Hey guys @carsandcameras! To prep a methanol motor for storage you don't need to clean out the carburetor. Before the last oil change, shut your fuel off and then pull the fuel line. Start the engine up.. once it starts pulling the remaining methanol in the the line, submerge the fuel line into a bottle of Marvel's Mystery Oil. When the oil starts being pulled into the carburetor, give it slightly higher RPMs so that your engine doesn't die. It will run very boggy until all of the fuel is completely gone from the carburetor. Now your carb and all fuel components plus your cylinder and crankcase have all been lubricated for storage all in one swoop! Hope this helps!
Well, it was made as an upper cylinder lubricant, back when oils didn't have our modern detergents, lube modifiers, viscosity control, etc. It's not necessary anymore, but the storage idea is great!
I don't want to put a damper on your beautiful dad engine building moment, but it is critical to have the dowel pins installed when checking your clearances. It is far less important when using that awesome cnc machined cover, but with a factory cover the dowels ARE the locator and the cheesy stock covers have huge loose fitting bolt holes. Otherwise a spectacular teaching job and a wicked sounding engine. Hang on tite!
I love these traditional style, old school minibikes. Like I had over 50 years ago! Small frame, small wheels, no suspension, tall skinny bars, and in the old days a 3hp Tecumseh or Briggs. Not the monster engines they make now!
Most people hear "Budget build" and confuse it with "Low cost build" everything is with a budget in mind. I do like how you try to explain it to people and not just go with the term alone. In certain classes a $500 build is a low budget build, then in a different class $3k is a low budget when others are spending upwards of $20k racing same people. Love your channel :)
Heck no!! Ruining a beautiful 2-stroke masterpiece to replace it with the most overdone engine swap in motorcycle history?? I say make a custom shifter bike with a completely custom chassis for a Busa, sir.
Switching to weekly uploads was such a good move for this channel, these videos are Incredible. Absolutely love the longer format videos like this with higher production quality, can't believe we get this content for free. Love you guys
In 2019 i bought an exact same stock doodlebug in brand new condition for 250. It instantly got a 212 HF and a torque converter and i was hooked (again) as it had been over 40 years since my last mini. In no time at all, well by the next summer, it goes 8 50s @74 with relative ease. These are so simple and fun. Wheelie bars are a must for cvt torque-a-verter minis if you wanna go quick. Mine carries the front for at least the first 100 feet on the bars. Had a hard time at the track at first trying not to red light beause the tiny front wheel was going up and over the beams. Eventually I figured out how deep to stage and figured it out. I later built an identical doodlebug with nearly the same mods but it runs a hilliard inferno centrifugal. Very interesting testing both minis with only difference being the clutch and drive system
I watch these mostly for entertainment but like to see you get more involved. I've learned over time to use an old main bearing that I grind down the od of of for easy removal and install to use for test fitting and 1st assembly of almost everything. Then I don't worry much about dirt and dust early on. I also don't put rings on.at this point - that lets me feel binding or tight spots easier. Then I disassemble everything, deburr, everything, remove bearing and scrub block in hot soapy water multiple times!!! Wipe bore with oil, install new bearing and seal and assemble. Once assembled put oil in and roll motor around every day or so and again when installing and you'll know oil is everywhere. Also, my theory on push rods is rocker should be level with head, and tip centered on valve tip at 1/2 of valve travel. That makes for the least stress on valve train in my eyes. Cool video!
I see near the end you swapped a set of stock mega moto style handlebars. As hard as ive tried to make them work, just can't seem to get drag bars to work on a doodlebug. They hit your knees and put you in the most awkward riding position ever which won't even allow you to make a pass. Both my drag doodlebugs have either the one piece fork bars like stock or a set off an old bmx bike from the 80s. Ive even tried flat drag handlebars with 6 inch risers and nope just can't get them to work. This whole build is right up my alley boys. Been watching this channel since early 2017 and love how y'all have kept the same vibe over the years.
Actually,if one nicks the cranks rod journal that crank is still usuable as long as the nick is recessed, or emery emory cloth smoothed and polished back up as a slight depression is fine as the crank and bearings do not actually touch one another when the engine is running.. Thin layer of oil separates them and all you've done is create a place where extra oil will fill in... I've seen and built many engines with cranks that had marks and they've lasted 1000s of passes,laps,or 100s of 1000s of miles... Small nicks,or scratches yes,but not 1/4" by 1/2" trenches...
You don’t have an oil pump so Ike’s plan to go with assembly lube is definitely the way to go, btw boys I may be wrong here but “lapping” flywheel is for making sure the press fit is exact, not for the binding effect exactly, we do the same thing at the machine shop to make a balancer fit, we hone it slightly so press isn’t too tight or too loose, just my 2 cents
The rod literally goes below the oil level in the crankcase. Assembly lube is pretty much pointless on these engines. You don't have to wait for oil to full up passages. It's instantly splashed on the first revolution. Just saturate the parts with the oil you'd use and you're good to go.
My man, great work! Stoked to see young dudes getting their hands dirty and funkin around on shit like this! Thank you also, for not having background music. 😂 This is the first of your videos I've seen and im about to check what's new 4 years later.
You’re looking good Ike. I’ve watched some over the past decade, but you guys’ new stuff is what I’ve been getting into the most! Thank you for everything you’ve done
I bought the same one right out of the back of a guy's truck for 60 bucks 2 years ago it was just red but it was a doodle dirt bug. I bought a 79 CC threw it on there for my son and he loves the dang thing. Does about 30. Love the channel benefit all the way back to the rat rod wagon 💯
I've got two Dirt Bugs and they're my favorite mini bikes. To me they're the quintessential mini bike. One of mine has a 302cc on it, the frame doesn't flex as much once you're sitting on it
Guys.. I wish you would have got it together enough to make a run around the Grand Prix. Yes I know it would have been at the bottom of the leaderboard but would have been really cool. You guys don’t have a 79cc on the leaderboard. Thanks for sharing!!
I remember when John built up his first project bike without Ike, it was something like a Z50. He kind of did it behind Ikes back, but I think he wanted to prove to himself that he could complete a job on his own. Ike walked in and saw the bike, and loved it! But I think was a little disappointed he wasn't included at the same time. Fast forward a few years, and John is building performance engines without thinking twice about it! Much love from Yorkshire, gods county ❤ UK
my first engine build was a zeda 80 firestorm, a bicycle 2 stroke. it's a good beginner engine, you'll learn a lot, and there's no valves so it's pretty simple. 200 bucks for a whole ass kit good luck fellas, that's a nice lookin build
It's always surprising how well am little 2 stroke can run. I wish the 49cc pocket bike engines had a robust trans on them like the bike kits... They have a flywheel fan cooling them and the bike kits tend to get hot. Otherwise, an eBay 49cc (40cc ish) engine is only $43 and there can be mods done to learn on. I have one, runs ok but needs a bigger jet out the box
Those amazon electric transfer pumps are amazing. still running the same D battery mine came with 2 years ago. Fills my kerosene heater in the winter, and my boat in the summer! haha
Hey ike, around 1:31:50 when a fresh engine gets hard to pull ive found the valves need to be lashed again to whatever spec you wanna run, especially with a little heat in the motor. Hot lash is even more important than cold lash. If you run the valves i bet it pulls like butter...lets see what happens...
Buddy and I just got an old kart. Yanked the Briggs off it and threw on a Predator 212. Got some issues to work through but it's a runner now. Floor pan need to be rewelded. It's 1/2 hanging off. Need to rig a return spring for the throttle. Also needs a spacer plate to raise the motor a but to tighten the chain. May end up extending the chassis 4-6 inches too.
I like your buddy's idea of supermanning it. I'd weld some pegs off the back or off the wheelie bars so you can lay out like a drag bike, so your not so squished up...definitely would be better for aerodynamics and way more stable when hitting high speeds for sure. Or just drag your feet off the back at least, to be more stable. Just my 2 cents... Love the build though, that thing looks sick too. 👍👍
You were talking about getting the intake fuel/air mixture down into the cylinder. If you had a thin brass, copper, or aluminum plate with fins that went horizontal across the opening. It would be secured by the gasket. Have the fins directed down but almost horizontal to assist in forcing the mix down.as an example make a plate 3/4" high and and enough to go across the opening, possibly to go to the bolts to index. Make 3, 1/4" fins to fold back so there is minimal resistance against the fins. My wife says I am a genius with a capital J.
Ike is the only thing that keeps me watching these videos, no offense to John but I like the advice from someone who actually knows what they are talking about. Not just big words and nonsense to sound good.
I can say for a fact this will hold 450 lbs easy. Me and my buddy used to double up on one of these in highschool and ride around our town took everything we threw at it to the point I had a rope to start it and a MTN dew bottle as a gas tank for a bit but then I tore it down gave it full suspension and Honda xr100 motor but sadly while waiting for parts like a new tank and seat someone threw it in the scrap 😂
Might be a good idea to add a pipe extension and a spigot to the oil drains for methanol engines, make it a lot easier to drain em. Maybe a set of boardtracker bars to get ike a little lower and further forward on the front end
That’s a dope, I did a 32/25 head on mine too but I bought mine from EC which was already smoothed out inside so I never had to mess with it. It had to be though because they sell it with the seats and valves already in it and I just replaced the valve springs and retainers with 55lb or 60lb dual springs. Oh and I got you beat on the black venoms because I got the 1.35 😂
Damn... The golf ball surface ❤❤❤ That was my Uncle Bills trick for restrictor plated briggs on racing gocarts, starting like at least 22 yrs ago.. Well thats whenni learned. He was also super of a course so wonder where the idea come from. Haha Shhh dont tell. Had to find things for that edge legal.. Minor cheat was to flex plate mildly for slight oval. Small engines, benfit frim small things. But mad love on that knowledge!!!
Debate time! Smooth bore intake Or Dimple intake to allow the golf ball effect. Or swirl intake to improve the squish and swirl of the fuel air ratio for superior combustion
I used to be super careful with h engine builds like that, though that was before i had pulled multiple siezed motors out of the junkyard broke em loose and had them run for years without being opened up, they arent as sensitive to dust and dirt as you would think, bow of course its not ideal to run a ton of shavings or dirt through a newly built engine but it also isnt going to trash it like some engine builder lead you to believe either.
I had no idea mini bikes were on the rise. I'm 55 and in 1979 in 5th grade I used to go to the library nearly daily to look at the book, "Minibikes" and dream of owning one. I ended up buying a Honda XR80 and I was the coolest kid (to me, even though I was still a total dork). EDIT : WOW $80 for a running minibike !
Slitting the fork tube wont make it stronger. Just weld the axle plate on from both sides with full penetration. Cutting a slot for it weakens the fork tubing a LOT
Another things that's important to discuss when building an engine is ring gap. Metal expands when it get's hot and the last thing you want is for your rings to bind because they got to big for the bore. Most engine manufacturers have a rating for how large the gap should be which takes a lot of the guess work out of the job.
Modern performance ring technology has found opening up the 2nd ring gap slightly larger than the top compression ring keeps gasses from stacking up between the rings and works to reduce ring flutter and unloading the top ring from its land under wot high rpm
Incorporate a scatter shield and mount for the clutch. Get a longer bolt run a steel sleeve out of the clutch, put a bearing on it make an aluminum plate to mount the bearing on and attach it to the frame. It you want to get carried away run the plate from the crank and mount the tensioner on it them connect it to the rear axle.
WOW 💪. What an awesome video 👍. The only problem this Old Man from Washington NC had to watch it on my phone 😭. Internet down again so no 70 inch TV. Always looking forward to your videos. 🛵🧔💝💝
Ike, waiting for it to chunk a rod with your safety goggles hanging on your shirt! Damned glad I'm not the only one doing s-it like that lol. That little Doodlebug wants to be a chopper when it grows up. (extended forks with a skinny front wheel would really make it a custom and not a chopper, but everyone's been calling 'em choppers.)
@@richardhatt6541 the rake alone would stabilize the bike in a straight line. Those extender and raked forks used to be the trick for drag racing. And it does look cool 🙂
@@richardhatt6541 , I'd like to see Ike and John recreate the bikes from Easy Rider in mini form. They could dress the part and ride 'em in swap meets, car shows etc. Bet they'd have more fun that they'd think.
when installing any kind of washers where precision is needed don't grab just any washer. There is a big difference between tolerance machined washers and your standard bulk stamped washers the thickness can vary greatly.
I know it sounds insane, and that's because my dream bike IS INSANE. I wanna put a big ass KOHLER 2 cylinder engine on it, with a custom frame to fit the engine. I don't think there are many mods available for those, but I love those V-twin engines lol
here's a easy and useful tip, get a plastic cup what has the same diameter ( its can be funnel style cup also ) So at the bottom and at the top of the cup are same size, then you cut the part off you wanna use, pull it over the piston and slide the rings on,no more bending rings and you can also put in ring cap a plastic chips or make a wooden chips , what keeps ring so open at you can slide it in piston,many easy simple things to get stuff made..
A tip I got for you guys on them motors mix 2 stroke gas like 4 to 1 and run it through the pulse pump and the carb reving it up til it goes ritch and it’ll flush everything through the carb and piston the only down side is it will be hard to start
I remember as I kid that had a bonanza mini bike. We would shove stuff in the centrifugal clutch at the top of a hill get her going again. Yes that was after losing interest in lawn darts. But what’s funny the teacher in my wood shop lost a few of his fingers. What a great teacher of wood shop. Some may think he learned a lesson. I say he is why there is a warning not to replace a fan belt while motor is running.
5:55 put the little engine in one of those little razor dirt bikes from Walmart. Like the little 650. I think it would be an awesome cool build. as a matter of fact, the next time you come down to Texas swing through Louisiana and I will give you a fully assembled razor bike everything’s there. The batteries are dead but it is complete. I have a couple of them everything is stored inside. None of it is outside.
Ike, if you want to bump the trap speed up from 75 to 100 maybe you should take that air brake...I mean fender off the front. P.S. Dont forget to make a cheese grater cover. Rules.
Assembly lube for a mock up is a bad idea. It will attract debris and may keep you from seeing an issue. A dab of clay on that counterweight and rotate and it will show you how much clearance you have. A no noise check will only tell you it isn't hitting but heat and flex may allow contact in use. Figure a temp change etc and check if there's enough. I do like the "hands on tech" format and style of this video.
You actually wanna have the rockers with a slight angle downward on the pushrod side. Hope that helps. Love the videos. You guys got me into engine building and mini bikes
My drag car has been on methanol for several years now. I love everything about it, however every time I have ever took my motor out to freshen it along with everyone I know. It’s always good to break it in and seat the rings on gasoline first then make the switch. It’s pretty common practice
[ yes, I am a pedant, an Autistic one :-P ] 35:00 - Fugal, petal means inward... ED To avoid in future, just say 'angular momentum' it's science. NB Look up Centrifuge and it's purpose for a reminder.
Atomization doesn't happen on a rough surface. I think what Ike was trying to explain is actually called boundary layer effect, which makes the air flow better in a port with rough surfaces since a layer of air "sticks" to it and smooths turbulence. It has nothing to do with fuel atomization, which happens in the needle jet orifice where it enters airstream in the carb.
Slick intake finish = puddling/loosing the atomization. Think of it as water running off your windshield after being squirted (more of a mist) out of the squirters. You want as much surface area to your air/fuel mixture as you can get. When your mixture “puddles” you loose tons!
"boundary layer" applies to smooth surfaces too. Has to do with the speed or velocity of air passing over a surface, faster you go the greater the boundary layer effect. A rough surface in the intake track is to help maintain air/fuel atomization and trying to prevent fuel from dropping out of atomized homogenous mixture back into inefficient droplets that won't burn in their own without oxygen. Again velocity plays a big part in this too, but boundary layer occurs no matter if surface is smooth or rough
When I was buying all my parts over the winter for my build I’m starting on now, I decided to do a 236 but when I went to buy the crank I found that you can actually get a 59mm crank pushing you to 241. So I’ll be running my 241 on premium gas and I have a Nitrous set up specifically for small engines
Hey guys @carsandcameras! To prep a methanol motor for storage you don't need to clean out the carburetor. Before the last oil change, shut your fuel off and then pull the fuel line. Start the engine up.. once it starts pulling the remaining methanol in the the line, submerge the fuel line into a bottle of Marvel's Mystery Oil. When the oil starts being pulled into the carburetor, give it slightly higher RPMs so that your engine doesn't die. It will run very boggy until all of the fuel is completely gone from the carburetor. Now your carb and all fuel components plus your cylinder and crankcase have all been lubricated for storage all in one swoop! Hope this helps!
I do the same thing to my engine I mix mine 50/50 gas and marvels mystery oil
Rumor's been told that to this day, even Derek at Vice Grip Garage doesn't know what's in it! *IT'S A MYSTERY!* 🤣
😂😂😂@@RRRIBEYE
Well, it was made as an upper cylinder lubricant, back when oils didn't have our modern detergents, lube modifiers, viscosity control, etc.
It's not necessary anymore, but the storage idea is great!
Keep the updates coming. 😮 Thanks for sharing!!!!!!😮😊🎉
Engine build AND bike build in one episode? Heck yeah! Apologies for the late upload!
Yea were mad about the free content lol
I don't want to put a damper on your beautiful dad engine building moment, but it is critical to have the dowel pins installed when checking your clearances. It is far less important when using that awesome cnc machined cover, but with a factory cover the dowels ARE the locator and the cheesy stock covers have huge loose fitting bolt holes.
Otherwise a spectacular teaching job and a wicked sounding engine.
Hang on tite!
Port matching gets rid of the "Speedbumps".
Worth the wait!
I love these traditional style, old school minibikes. Like I had over 50 years ago! Small frame, small wheels, no suspension, tall skinny bars, and in the old days a 3hp Tecumseh or Briggs. Not the monster engines they make now!
Thanks for the invite, boys! Had a blast working with yall on this mean mini!
I kind of prefer these later upload times. Home from work, get to kick back and relax!
Like you can't save and watch it anytime you want.
I prefer to watch these in one sitting. And also like to comment within the first few minutes as well.
Exactly!!
Exactly
Most people hear "Budget build" and confuse it with "Low cost build" everything is with a budget in mind. I do like how you try to explain it to people and not just go with the term alone. In certain classes a $500 build is a low budget build, then in a different class $3k is a low budget when others are spending upwards of $20k racing same people. Love your channel :)
Really would love to see you guys build a old school style chopper mini bike from scratch .
this would be awesome, id love to see a clean mini chopper build from these guys
That odyssey is sitting there just waiting for a hyabusa engine 😁
Heck no!! Ruining a beautiful 2-stroke masterpiece to replace it with the most overdone engine swap in motorcycle history?? I say make a custom shifter bike with a completely custom chassis for a Busa, sir.
Switching to weekly uploads was such a good move for this channel, these videos are Incredible. Absolutely love the longer format videos like this with higher production quality, can't believe we get this content for free. Love you guys
In 2019 i bought an exact same stock doodlebug in brand new condition for 250. It instantly got a 212 HF and a torque converter and i was hooked (again) as it had been over 40 years since my last mini. In no time at all, well by the next summer, it goes 8 50s @74 with relative ease. These are so simple and fun. Wheelie bars are a must for cvt torque-a-verter minis if you wanna go quick. Mine carries the front for at least the first 100 feet on the bars. Had a hard time at the track at first trying not to red light beause the tiny front wheel was going up and over the beams. Eventually I figured out how deep to stage and figured it out. I later built an identical doodlebug with nearly the same mods but it runs a hilliard inferno centrifugal. Very interesting testing both minis with only difference being the clutch and drive system
I watch these mostly for entertainment but like to see you get more involved. I've learned over time to use an old main bearing that I grind down the od of of for easy removal and install to use for test fitting and 1st assembly of almost everything. Then I don't worry much about dirt and dust early on. I also don't put rings on.at this point - that lets me feel binding or tight spots easier. Then I disassemble everything, deburr, everything, remove bearing and scrub block in hot soapy water multiple times!!! Wipe bore with oil, install new bearing and seal and assemble. Once assembled put oil in and roll motor around every day or so and again when installing and you'll know oil is everywhere. Also, my theory on push rods is rocker should be level with head, and tip centered on valve tip at 1/2 of valve travel. That makes for the least stress on valve train in my eyes. Cool video!
Well John knows as much as my wife about building engines Good thing for Ike and Google
I see near the end you swapped a set of stock mega moto style handlebars. As hard as ive tried to make them work, just can't seem to get drag bars to work on a doodlebug. They hit your knees and put you in the most awkward riding position ever which won't even allow you to make a pass. Both my drag doodlebugs have either the one piece fork bars like stock or a set off an old bmx bike from the 80s. Ive even tried flat drag handlebars with 6 inch risers and nope just can't get them to work.
This whole build is right up my alley boys. Been watching this channel since early 2017 and love how y'all have kept the same vibe over the years.
Laying down some aluminum foil under the drain plug helps direct the oil a little better. You can shape it. I saw it on TH-cam. 😂.
I’m stoked that you guys bought the fl350r odyssey 😊can’t wait to see you guys ride it they are a blast.
Waiting to see the continuance of the development of the DRAG RAIL!!!
Actually,if one nicks the cranks rod journal that crank is still usuable as long as the nick is recessed, or emery emory cloth smoothed and polished back up as a slight depression is fine as the crank and bearings do not actually touch one another when the engine is running.. Thin layer of oil separates them and all you've done is create a place where extra oil will fill in...
I've seen and built many engines with cranks that had marks and they've lasted 1000s of passes,laps,or 100s of 1000s of miles... Small nicks,or scratches yes,but not 1/4" by 1/2" trenches...
You don’t have an oil pump so Ike’s plan to go with assembly lube is definitely the way to go, btw boys I may be wrong here but “lapping” flywheel is for making sure the press fit is exact, not for the binding effect exactly, we do the same thing at the machine shop to make a balancer fit, we hone it slightly so press isn’t too tight or too loose, just my 2 cents
The rod literally goes below the oil level in the crankcase. Assembly lube is pretty much pointless on these engines. You don't have to wait for oil to full up passages. It's instantly splashed on the first revolution. Just saturate the parts with the oil you'd use and you're good to go.
My man, great work! Stoked to see young dudes getting their hands dirty and funkin around on shit like this! Thank you also, for not having background music. 😂 This is the first of your videos I've seen and im about to check what's new 4 years later.
im bedridden and bored Over an hour episode is exactly what I needed
Feel better my man!
Me too waiting for hip to heal😊
The thought of pushing those forks at 100 miles an hour is more than vaguely terrifying.
You’re looking good Ike. I’ve watched some over the past decade, but you guys’ new stuff is what I’ve been getting into the most! Thank you for everything you’ve done
This is the exact color of the first mini bike I ever built I started watching you guys to learn how to build it
That’s a rad mini bike . It’s going to be fun to speed test it.
I bought the same one right out of the back of a guy's truck for 60 bucks 2 years ago it was just red but it was a doodle dirt bug. I bought a 79 CC threw it on there for my son and he loves the dang thing. Does about 30. Love the channel benefit all the way back to the rat rod wagon 💯
I've got two Dirt Bugs and they're my favorite mini bikes. To me they're the quintessential mini bike. One of mine has a 302cc on it, the frame doesn't flex as much once you're sitting on it
I mean credit where it's due, but john is really riding that Paul dude's shock.😂
You turned it from the Doodlebug, to the Doodle Bob... Me Hoi Minoy... XD
Are we ever going to get new kart build videos again? Or is this strictly a mini bike channel now
Guys.. I wish you would have got it together enough to make a run around the Grand Prix. Yes I know it would have been at the bottom of the leaderboard but would have been really cool. You guys don’t have a 79cc on the leaderboard. Thanks for sharing!!
I remember when John built up his first project bike without Ike, it was something like a Z50. He kind of did it behind Ikes back, but I think he wanted to prove to himself that he could complete a job on his own. Ike walked in and saw the bike, and loved it! But I think was a little disappointed he wasn't included at the same time.
Fast forward a few years, and John is building performance engines without thinking twice about it!
Much love from Yorkshire, gods county ❤ UK
First late drop has people’s anxiety heightened 😂
Great episode guys!
Micro cart all the way guys. Next project!!
my first engine build was a zeda 80 firestorm, a bicycle 2 stroke. it's a good beginner engine, you'll learn a lot, and there's no valves so it's pretty simple. 200 bucks for a whole ass kit
good luck fellas, that's a nice lookin build
It's always surprising how well am little 2 stroke can run. I wish the 49cc pocket bike engines had a robust trans on them like the bike kits... They have a flywheel fan cooling them and the bike kits tend to get hot. Otherwise, an eBay 49cc (40cc ish) engine is only $43 and there can be mods done to learn on. I have one, runs ok but needs a bigger jet out the box
Really like this format. Been watching as a enthusiast of engineering I follow you as I do grind hard plumbing keep up the good work
Those amazon electric transfer pumps are amazing. still running the same D battery mine came with 2 years ago. Fills my kerosene heater in the winter, and my boat in the summer! haha
Have a good time guys and as always be good be safe
Hey ike, around 1:31:50 when a fresh engine gets hard to pull ive found the valves need to be lashed again to whatever spec you wanna run, especially with a little heat in the motor. Hot lash is even more important than cold lash. If you run the valves i bet it pulls like butter...lets see what happens...
Buddy and I just got an old kart. Yanked the Briggs off it and threw on a Predator 212. Got some issues to work through but it's a runner now. Floor pan need to be rewelded. It's 1/2 hanging off. Need to rig a return spring for the throttle. Also needs a spacer plate to raise the motor a but to tighten the chain.
May end up extending the chassis 4-6 inches too.
I like your buddy's idea of supermanning it. I'd weld some pegs off the back or off the wheelie bars so you can lay out like a drag bike, so your not so squished up...definitely would be better for aerodynamics and way more stable when hitting high speeds for sure. Or just drag your feet off the back at least, to be more stable. Just my 2 cents...
Love the build though, that thing looks sick too. 👍👍
Extended forks also help keep the front wheel down during hard acceleration (drag racing)
You were talking about getting the intake fuel/air mixture down into the cylinder. If you had a thin brass, copper, or aluminum plate with fins that went horizontal across the opening. It would be secured by the gasket. Have the fins directed down but almost horizontal to assist in forcing the mix down.as an example make a plate 3/4" high and and enough to go across the opening, possibly to go to the bolts to index. Make 3, 1/4" fins to fold back so there is minimal resistance against the fins. My wife says I am a genius with a capital J.
hell yeah the good ol doodlebug! such a fun little mini bike
Ike is the only thing that keeps me watching these videos, no offense to John but I like the advice from someone who actually knows what they are talking about. Not just big words and nonsense to sound good.
🤣😂🤣😂🤣😂😂 you think 🤣😂🤣😂Ike knows what he's talking about 😂🤣😂😂😭😭😭😭😭 holy crap man.
I can say for a fact this will hold 450 lbs easy. Me and my buddy used to double up on one of these in highschool and ride around our town took everything we threw at it to the point I had a rope to start it and a MTN dew bottle as a gas tank for a bit but then I tore it down gave it full suspension and Honda xr100 motor but sadly while waiting for parts like a new tank and seat someone threw it in the scrap 😂
Might be a good idea to add a pipe extension and a spigot to the oil drains for methanol engines, make it a lot easier to drain em. Maybe a set of boardtracker bars to get ike a little lower and further forward on the front end
That’s a dope, I did a 32/25 head on mine too but I bought mine from EC which was already smoothed out inside so I never had to mess with it. It had to be though because they sell it with the seats and valves already in it and I just replaced the valve springs and retainers with 55lb or 60lb dual springs. Oh and I got you beat on the black venoms because I got the 1.35 😂
Just a FYI I never put lube on a shaft where it fits in a ball roller or needle bearing unless the shaft also acts as the inner race .
WOOOOOOO!!!!! Much love from Texas guys! Austin area here and we love ya!
Cool build , it would be cool to see a revival of the cross cart I believe it's the one with the honda motorcycle engine.
Damn... The golf ball surface ❤❤❤ That was my Uncle Bills trick for restrictor plated briggs on racing gocarts, starting like at least 22 yrs ago.. Well thats whenni learned. He was also super of a course so wonder where the idea come from. Haha Shhh dont tell. Had to find things for that edge legal.. Minor cheat was to flex plate mildly for slight oval. Small engines, benfit frim small things. But mad love on that knowledge!!!
Debate time!
Smooth bore intake
Or
Dimple intake to allow the golf ball effect.
Or
swirl intake to improve the squish and swirl of the fuel air ratio for superior combustion
I used to be super careful with h engine builds like that, though that was before i had pulled multiple siezed motors out of the junkyard broke em loose and had them run for years without being opened up, they arent as sensitive to dust and dirt as you would think, bow of course its not ideal to run a ton of shavings or dirt through a newly built engine but it also isnt going to trash it like some engine builder lead you to believe either.
Definitely one of the most explained educational videos you have put out. Thanks guys
O wait why didn't you show the ring compression
I had no idea mini bikes were on the rise. I'm 55 and in 1979 in 5th grade I used to go to the library nearly daily to look at the book, "Minibikes" and dream of owning one. I ended up buying a Honda XR80 and I was the coolest kid (to me, even though I was still a total dork). EDIT : WOW $80 for a running minibike !
Far from running.... was rusted out & locked up. The opposite of running.
Slitting the fork tube wont make it stronger. Just weld the axle plate on from both sides with full penetration. Cutting a slot for it weakens the fork tubing a LOT
It sounds like a nitromethane burning one cylinder which is obscure but you can hear the sound of the fuel, amazing that motor can do that! 💪
Another things that's important to discuss when building an engine is ring gap. Metal expands when it get's hot and the last thing you want is for your rings to bind because they got to big for the bore. Most engine manufacturers have a rating for how large the gap should be which takes a lot of the guess work out of the job.
Yeah, I was waiting for this to be mentioned in the video.
They come pre sized and have too big a gap for methanol so nothing needed to be done there.
Modern performance ring technology has found opening up the 2nd ring gap slightly larger than the top compression ring keeps gasses from stacking up between the rings and works to reduce ring flutter and unloading the top ring from its land under wot high rpm
Watching you guys at the track is going to be awesome. That is one wicked machine. Good luck and be safe. I will see you later.
Mini bike transformed in nice project. It has a cool stance it has potential until you put thru the shake down check n do list 👍.
i picked up a old mini bike with a Briggs 5hp flathead for $80 myself lol it sat for 10 years started 2nd pull. Building the engine sounds fun
Incorporate a scatter shield and mount for the clutch. Get a longer bolt run a steel sleeve out of the clutch, put a bearing on it make an aluminum plate to mount the bearing on and attach it to the frame. It you want to get carried away run the plate from the crank and mount the tensioner on it them connect it to the rear axle.
WOW 💪. What an awesome video 👍. The only problem this Old Man from Washington NC had to watch it on my phone 😭. Internet down again so no 70 inch TV. Always looking forward to your videos. 🛵🧔💝💝
John, take out the two oil drain plugs and scrub them out with an oil gallery brush.
Ike, waiting for it to chunk a rod with your safety goggles hanging on your shirt! Damned glad I'm not the only one doing s-it like that lol. That little Doodlebug wants to be a chopper when it grows up. (extended forks with a skinny front wheel would really make it a custom and not a chopper, but everyone's been calling 'em choppers.)
In the beginning I was thinking make it a chopper to lower it and make it look cool.
@@richardhatt6541 the rake alone would stabilize the bike in a straight line. Those extender and raked forks used to be the trick for drag racing. And it does look cool 🙂
@@richardhatt6541 , I'd like to see Ike and John recreate the bikes from Easy Rider in mini form. They could dress the part and ride 'em in swap meets, car shows etc. Bet they'd have more fun that they'd think.
I noticed a swap meet Honda Oddysey in the background!!!!
Death trap should be this one’s name 😂 and make a small boat from the 79cc kne of those like long tails with the king shaft drive
when installing any kind of washers where precision is needed don't grab just any washer. There is a big difference between tolerance machined washers and your standard bulk stamped washers the thickness can vary greatly.
Damn Johnny,
You're pretty smart there. Not just a pretty face/ drag race record setter.
Haha i remember building an engine and needing to compress the rings before it would go in. Not easy.
I know it sounds insane, and that's because my dream bike IS INSANE.
I wanna put a big ass KOHLER 2 cylinder engine on it, with a custom frame to fit the engine.
I don't think there are many mods available for those, but I love those V-twin engines lol
here's a easy and useful tip, get a plastic cup what has the same diameter ( its can be funnel style cup also ) So at the bottom and at the top of the cup are same size, then you cut the part off you wanna use, pull it over the piston and slide the rings on,no more bending rings and you can also put in ring cap a plastic chips or make a wooden chips , what keeps ring so open at you can slide it in piston,many easy simple things to get stuff made..
a general rule of thumb is 86-88% of the valve size for the port throat size, too large and air velocity will drop
I was waiting all day for a video
A tip I got for you guys on them motors mix 2 stroke gas like 4 to 1 and run it through the pulse pump and the carb reving it up til it goes ritch and it’ll flush everything through the carb and piston the only down side is it will be hard to start
Uncle Ike strikes again😅
I remember as I kid that had a bonanza mini bike. We would shove stuff in the centrifugal clutch at the top of a hill get her going again. Yes that was after losing interest in lawn darts. But what’s funny the teacher in my wood shop lost a few of his fingers. What a great teacher of wood shop. Some may think he learned a lesson. I say he is why there is a warning not to replace a fan belt while motor is running.
5:55 put the little engine in one of those little razor dirt bikes from Walmart. Like the little 650. I think it would be an awesome cool build. as a matter of fact, the next time you come down to Texas swing through Louisiana and I will give you a fully assembled razor bike everything’s there. The batteries are dead but it is complete. I have a couple of them everything is stored inside. None of it is outside.
That clutch is the leg grinder 5000 :) I was waiting for Ike to forget and slide his leg back slightly and get bit 😱
Fastest way, I learn to start an engine, take the spark plug out, put some brake cleaner in the head and put the plug back in and pull
Starts every time
Feature length fun. Great build lads.
I just did a similar thing but with a 20 dollar scrap yard find I've posted a couple shorts about it
Never napped so good i actually enjoyed this ran it back and all
Ike, if you want to bump the trap speed up from 75 to 100 maybe you should take that air brake...I mean fender off the front.
P.S. Dont forget to make a cheese grater cover. Rules.
Assembly lube for a mock up is a bad idea. It will attract debris and may keep you from seeing an issue. A dab of clay on that counterweight and rotate and it will show you how much clearance you have. A no noise check will only tell you it isn't hitting but heat and flex may allow contact in use. Figure a temp change etc and check if there's enough. I do like the "hands on tech" format and style of this video.
You actually wanna have the rockers with a slight angle downward on the pushrod side. Hope that helps. Love the videos. You guys got me into engine building and mini bikes
you guys should really pave a mini drag strip on the land
Is it me or is John getting a bit sassy.
For real
He best put respect on IKEs name for real
Ok yeah I noticed that too..getting a lil too big for his britches
I noticed years ago that this channel had a slightly gay vibe to it....? I don't care lol
Yes.
Yes and no.
I hope the frame does not flex too much when you test it on pavement with some traction. Can't wait to see it go down the track.
My drag car has been on methanol for several years now. I love everything about it, however every time I have ever took my motor out to freshen it along with everyone I know. It’s always good to break it in and seat the rings on gasoline first then make the switch. It’s pretty common practice
i really wanna see a video on that blue car
[ yes, I am a pedant, an Autistic one :-P ]
35:00 - Fugal, petal means inward...
ED
To avoid in future, just say 'angular momentum' it's science.
NB Look up Centrifuge and it's purpose for a reminder.
When I picture a mini bike I picture a doodlebug
Thank you for the details and miss Charlies but you guys are still great 👍👍
I love Ike but he looks just like Ricky Bobby
Just saw the shelf of beans fits in perfectly
Atomization doesn't happen on a rough surface. I think what Ike was trying to explain is actually called boundary layer effect, which makes the air flow better in a port with rough surfaces since a layer of air "sticks" to it and smooths turbulence. It has nothing to do with fuel atomization, which happens in the needle jet orifice where it enters airstream in the carb.
Slick intake finish = puddling/loosing the atomization. Think of it as water running off your windshield after being squirted (more of a mist) out of the squirters. You want as much surface area to your air/fuel mixture as you can get. When your mixture “puddles” you loose tons!
I think fuel suspension is the better term
"boundary layer" applies to smooth surfaces too. Has to do with the speed or velocity of air passing over a surface, faster you go the greater the boundary layer effect. A rough surface in the intake track is to help maintain air/fuel atomization and trying to prevent fuel from dropping out of atomized homogenous mixture back into inefficient droplets that won't burn in their own without oxygen. Again velocity plays a big part in this too, but boundary layer occurs no matter if surface is smooth or rough
You know Ike is an idiot right?
Yup, it's called surface turbulence. I have seen companies do cnc steps in the intake and exhaust runners to help reduce turbulence turbulence
When I was buying all my parts over the winter for my build I’m starting on now, I decided to do a 236 but when I went to buy the crank I found that you can actually get a 59mm crank pushing you to 241. So I’ll be running my 241 on premium gas and I have a Nitrous set up specifically for small engines
Ike (23:30/24:50) Just easin' the tension, baby. Just easin' the tension! Lol. Carl Weathers/Happy Gilmore. Great job guy's.
2:17 Haha Ike, I saw it, I feel ya man!