Keep a close eye out for used Arctic Cat snowmobiles from the early 70's. I think evinrude also made a rotary but I know know how much is available in terms of parts or info. I picked up a 72 panther that was in boxes but had a running Sachs 303 in november. Got it back together by January and rode it all winter. I feel like I stole it for $150 lol. They're out they're if you can figure out where to find them.
The "brap brap brap" idle noise is just amazing for an engine that small, i has to be streetported or bridgeported i think, really excited about this build.
This is gonna be an awesome bike to ride. I've got a Sachs 303 snowmobile and the power delivery is unlike anything else, plus as long as you always run the right premix and never put the wrong spark plug in, they'll outlast any 2 stroke and make comparable power.
@@nathancarr7588 Ya... I was Stupid i use to work at a motorcycle shop and "we" all thought they where "junk" as in useless... came with a Large semi truck load of bikes to part out... Back then ebay was around... i should have taken them home!!!
3:01 if you use it at the other side, I mean put the short side at the bolt and use the larger side to make it loose, it’s going to be loose more easy. As much distance you have at the application force point you can put much torque to make it loose. Love your content. Hi from Mexico
I was thinking the same thing! I wonder if they're doing some sort of jack shaft, or if the just threw it up there to get rolling. They can mess with different gear ratios using a jack shaft, but a straight shot from the clutch to the rear sprocket would be alot easier... I guess we'll see!
That's a pretty bold statement compared to cars and cameras and rather be welding and etc. They are good! And the first I have seen with a rotaty motor. But kind of far from kings.
Very cool motor I have a Uncle that is aEngineer, retired AirForce ,and a retired Commercial Airline pilot , he is super cool and has many inventions patented one of his things now is converting Rotary Mazda engines for Aircraft use I asked him why the older Mazda’s had a lot of engine failure by destroying the lining inside the engine he told me the main problem was inadequate cooling systems I don’t know if you can adapt some type of a external oil cooler ? On yours but I bet it wouldn’t hurt to do so of course on a mini bike if engine failure happens prematurely you can coast safely to another area unlike a airplane that may crash ?
@@27Zangle i got written up for nicking a hydrolic line on a ship thst splits in half to dumb dirt/sand to make beaches and it was part the line thst open and closes the ship. Long story short like 80 foot of hard line had to be replaced because they wouldnt allow us to splice in a fix so yeah for 100 thousand for hydrolic line refitting
@@27Zangle yeah was like 8 years ago if not more now i dont even weld for a living anymore only sometimes for repairs or fun good stuff tho a trait i think everyone should learn with the enviroment we currently live in all the metal around us nowdays tyer can easily he a senario in like a apocalyptic world where having and being able to weld something could save your ride or your life simply knowing how to weld. But this is almost every construction style job i guess knowing how to measure cut and weld all of it is important imo not to mention deeply satisfying turning a flat plate into this big machine that moves the worlds economy. Just feels epic idk how to explain it
You need the cross supports on the forks or the bike will weave though the turns as weight and g force acts more on inside spring more than the outside spring
That sounds bad, a rotory should rev alot higher, Even that power sounds low for its capacity. Id expect 12k rpm and 30hp min. Even a 4 stroke 160cc would do better than those numbers...
These engines came with 10 hp stock and a 6000 rpm limit according to their manual. I think that tese engines can rev a lot higher with a better carburetor, lighter flywheel, and the appropriate fuel mix.
@@felixf8924 - Looks like we have found to differing articles about their power and numbers. Interesting. Either way, I totally agree these engines could be tuned up.
Looks like it ought to be fun! I'm curious if that welded in 3/4 shaft actually runs true since you didn't really have any kind of jig to hold it in place when you welded it. I didn't see it, but I hope you welded the outside edge on that E-shaft adapter also!😉 What happened to the Hercules powered kart? Still running?🙂
Your sprocket for the rear tire might be on the wrong side, or are you guys putting in a jack-shaft? But other than that cool video so glad you guys are doing another Rotary build.I'll be waiting for the next video that you put out on this build. Good thing that I'm a subscriber and hit the notification bell to let me know when your next video is available. ( cheap plug your welcome)
I believe the rotary engine makes more power and torque at less rpm than a small capacity piston engine. VGA have licenses to use these as range extension motors for EV automobiles.
I have 4 Sachs rotaries of this type. I have a km3(mounted to the original lawnmower), km37,km48, and km24. I have fully restored all of them including machining the housings and replacing the seals. I have powder coated the bed of the lawnmower to original spec as well. I have completely rebuilt all of them and have manuals for all of them if you need any help or Manuals I can send them
The friction drive paws of the pull start on these engines are a pain. I replaced the original material with new rubber however you can also put a layer of tape inside the housing to help if the cord ever slips. The stock bing carbs on these are VERY restrictive. You can make a lot more power if you switch over to an after market carb. I prefer to keep mine original for restoration however they can make a lot more power
"I can't actually make anything, so I'll buy a bunch of prefabbed parts wherever possible and then some random bits together and call it job done." Cool idea for a minibike, but I don't know if I enjoyed watching this.
@@Metal-Possum Yes.,do you think I'm sub normal bicycle mechanics should be able to make a tube framed mini bike from scractch or are you a modern " mechanic" - a parts changer , there's a difference to old school bike mechanics (no offence intended) what's the problem ? If you can fix an internal rear hub 3 speed gearbox from the '70's you should be ok , ??...Cheers Trev
That’s going to be a really cool mini bike 👍
I’m digging the rotary! Thanks for posting guys 🙂
I always wanted to own one of those engines!
Q
Ive found a few but there like 500
th-cam.com/video/e5Xg0Sri2_g/w-d-xo.html
Keep a close eye out for used Arctic Cat snowmobiles from the early 70's. I think evinrude also made a rotary but I know know how much is available in terms of parts or info. I picked up a 72 panther that was in boxes but had a running Sachs 303 in november. Got it back together by January and rode it all winter. I feel like I stole it for $150 lol. They're out they're if you can figure out where to find them.
Hey bro do you no of an engine for sale
1:50 I couldn't stop smiling when I heard that rotary engine idling. lol
This engine should be on market worldwide
It does sound so cool would never think it was a mini bike
Sweet build! I've got a KM37 wankel, supposedly makes 6.5 hp at 5,500 RPM. Glad to see so many comments sharing the rotary obsession!
The "brap brap brap" idle noise is just amazing for an engine that small, i has to be streetported or bridgeported i think, really excited about this build.
Peripheral ports also brap, more than a bridgeport.
@@ralliartfanevoix I did not know about peripheral port, thank you for the info, could it be done from factory ?
@@xxtrengt8871 Some do, biggest way to tell is an intake runner on the housing, not on a side plate.
no rotor,no motor!!! love you guys. love the rotary content. go! go ! rotary!
"No rotor, no motor"? More like No apex seals, no compression. Am I right?
This is gonna be an awesome bike to ride. I've got a Sachs 303 snowmobile and the power delivery is unlike anything else, plus as long as you always run the right premix and never put the wrong spark plug in, they'll outlast any 2 stroke and make comparable power.
That idle sounds so sweet
Years ago (like 15)something i scrapped like 10 of those rotary engines!
Wish i knew something about them back then!
Wow
@@nathancarr7588 Ya... I was Stupid i use to work at a motorcycle shop and "we" all thought they where "junk" as in useless...
came with a Large semi truck load of bikes to part out... Back then ebay was around... i should have taken them home!!!
I don't belive it, you don't even throw out your used ass wipe. Look at your yard.
@@joeychaput Hey watch my last video , i brought out two trailer loads to the dump LOL!
I learned from my screw up to save pretty much everything.
@@starpuss lmfao thats good. You must have been busy. Its not a bad idea to keep things but you were getting bad there for a bit. Keep it up man.
Thing looks like a retro bike from back in the day with that rotary on it makes it seem futuristic
3:01 if you use it at the other side, I mean put the short side at the bolt and use the larger side to make it loose, it’s going to be loose more easy. As much distance you have at the application force point you can put much torque to make it loose. Love your content. Hi from Mexico
I have a 1970 El Tigre with an Azusa front end and a 212 swap. That bike is going to be nice!
So looking forward to the build keep up the good work guys!
I see the sprocket on the other side of the clutch and it kills me😂
I was thinking the same thing! I wonder if they're doing some sort of jack shaft, or if the just threw it up there to get rolling. They can mess with different gear ratios using a jack shaft, but a straight shot from the clutch to the rear sprocket would be alot easier... I guess we'll see!
th-cam.com/video/e5Xg0Sri2_gf/w-d-xo.htmlr
I honestly feel like a rotary is perfect for bike applications great power to displacement
Love the sound of that rotary engine.....
You guys are the go kart and mini bike rotary kings!
im the king at running 17.3 meters in 29 seconds while juggling my balls
@@Eetu_Veikkola so are you juggling your balls by running or are you literally trying to juggle your balls while running?
That's a pretty bold statement compared to cars and cameras and rather be welding and etc. They are good! And the first I have seen with a rotaty motor. But kind of far from kings.
Nuu-Age1 but those guys haven’t even touched a rotary. Bbr knows what their doin’!
Very cool motor I have a Uncle that is aEngineer, retired AirForce ,and a retired Commercial Airline pilot , he is super cool and has many inventions patented one of his things now is converting Rotary Mazda engines for Aircraft use I asked him why the older Mazda’s had a lot of engine failure by destroying the lining inside the engine he told me the main problem was inadequate cooling systems I don’t know if you can adapt some type of a external oil cooler ? On yours but I bet it wouldn’t hurt to do so of course on a mini bike if engine failure happens prematurely you can coast safely to another area unlike a airplane that may crash ?
Who else noticed the back rim is on backwards😂🖐
That was the first thing I noticed.. I just wonder how long it took them to realize this mistake
Exotic_Bmx04 they might plan to install a jack shaft for gear reduction? That rotary will probably need it!
Friggin epic.
Really unique build! Absolutely love the little rotary engine!!
Nice build
Totally dig it
Needs a nice teardrop tank on top and it will be perfect. Looks great guys. Ive never seen a rotary MB before.
"you can see how small of a package this is" yea thats what she said.....................sorry you lobbed it out there and I had to go for it lol
Love the engine killer build.
I want to do one of these so bad great work guys this is so cool
Thanks for the video
That is so sick👍👍👍👍
You guys are awesome!!!
You guys have GOT to bring that to Pate!! Honestly I just want to race it on my kart LOL.
I love your intro
Cant wait to see this rip.
That rear sprocket lol, that should be fun. Good work, keep it up
Turbocharge it with draw through setup
Wish I could hear it running at the end ...sweet build👍
loving the style on this one. huge points for the rotary too. such a great combo, looking forward to the future vids!
That thing at idle sounded sickk
I love it!
That’s awesome!!!
Looking forward to this... 👍🏻👏🏻
It's A Masterpiece!
Next thing to bring into your shop is a lathe. Then you can just make any drive flange you need.
I miss the El tigre I sold. This one is lookin Awesome!
CooooooooL
This would be an awesome frame for an electric bike
Nice video
Love the cool content you guys have... plus the best intro... 👍
EFI TURBO!!!!!!!!!
Can’t wait. Considering trying a torque converter too?
That's f'n rad
you guys are in for a surprise when you find out the price and wait time to get the frame chromed!!! but it will be sick!!!!!
richie gerardi no doubt when the price quote comes back, they will be changing their plan. My guess is over $2000 to chrome it.
@@724x4acchevy it will be worth every penny
First sledge I ever drove was my Grandpa's 1970 Arctic Cat with the Wankel. He had to replace the rotor sliders like every 1,500 miles
When you weld near fuel tank cover it with a water soaked rag
Or anything with rubber as well. I have welded on tractor-trailers with air ride and would hate to burn a hole into one of those bags.
@@27Zangle i got written up for nicking a hydrolic line on a ship thst splits in half to dumb dirt/sand to make beaches and it was part the line thst open and closes the ship. Long story short like 80 foot of hard line had to be replaced because they wouldnt allow us to splice in a fix so yeah for 100 thousand for hydrolic line refitting
@@makoshark40 - Ouch.
@@27Zangle yeah was like 8 years ago if not more now i dont even weld for a living anymore only sometimes for repairs or fun good stuff tho a trait i think everyone should learn with the enviroment we currently live in all the metal around us nowdays tyer can easily he a senario in like a apocalyptic world where having and being able to weld something could save your ride or your life simply knowing how to weld. But this is almost every construction style job i guess knowing how to measure cut and weld all of it is important imo not to mention deeply satisfying turning a flat plate into this big machine that moves the worlds economy. Just feels epic idk how to explain it
You need the cross supports on the forks or the bike will weave though the turns as weight and g force acts more on inside spring more than the outside spring
They will probably weld that metal fender on there, that will give it back some support.
@@Mardy72 right the old structural fender trick
Apparently, these had roughly 8 horsepower and a 5k rpm redline.
That sounds bad, a rotory should rev alot higher, Even that power sounds low for its capacity. Id expect 12k rpm and 30hp min. Even a 4 stroke 160cc would do better than those numbers...
@@christianbuczko1481 - I believe it was made for industrial use.
th-cam.com/video/e5Xg0Sri2_g5/w-d-xo.html5
These engines came with 10 hp stock and a 6000 rpm limit according to their manual. I think that tese engines can rev a lot higher with a better carburetor, lighter flywheel, and the appropriate fuel mix.
@@felixf8924 - Looks like we have found to differing articles about their power and numbers. Interesting. Either way, I totally agree these engines could be tuned up.
Looks like it ought to be fun! I'm curious if that welded in 3/4 shaft actually runs true since you didn't really have any kind of jig to hold it in place when you welded it. I didn't see it, but I hope you welded the outside edge on that E-shaft adapter also!😉 What happened to the Hercules powered kart? Still running?🙂
Epic
Excited for this one 🔥
Hey, I just picked up that same frame, but without the rear shock, seat part. Any idea where I can pick those parts up?
Jesus loves YOU! He care about you and even died for you and for your sins! You need to repent and trust in Him!
Damn brother get a haircut hahaha love the channel!
Subscribing for the rotary!
Can you turbo a single rotor rotary engine easier than a single cylinder piston engine? Would love to see that!!!!!
Ahhhh yeeeaaahh dude can't wait to see it braaap around....Mabey even turbocharged ???
Yessss
Your sprocket for the rear tire might be on the wrong side, or are you guys putting in a jack-shaft? But other than that cool video so glad you guys are doing another Rotary build.I'll be waiting for the next video that you put out on this build. Good thing that I'm a subscriber and hit the notification bell to let me know when your next video is available. ( cheap plug your welcome)
I have a friend that make one about a year ago and it worck great
Oh yessss
I've had 2 of these engines but I'm in the Netherlands and there are no minibikes here so I never used them, did make a bunch of profit tho!
OMG YES
nice 👍
I'd like to see that rig setup with a converter belt drive.
This will go like hell btw! :D
You could put a amr300 supercharger on that it be a beast
I believe the rotary engine makes more power and torque at less rpm than a small capacity piston engine.
VGA have licenses to use these as range extension motors for EV automobiles.
I have 4 Sachs rotaries of this type. I have a km3(mounted to the original lawnmower), km37,km48, and km24. I have fully restored all of them including machining the housings and replacing the seals. I have powder coated the bed of the lawnmower to original spec as well. I have completely rebuilt all of them and have manuals for all of them if you need any help or Manuals I can send them
The friction drive paws of the pull start on these engines are a pain. I replaced the original material with new rubber however you can also put a layer of tape inside the housing to help if the cord ever slips. The stock bing carbs on these are VERY restrictive. You can make a lot more power if you switch over to an after market carb. I prefer to keep mine original for restoration however they can make a lot more power
Where did u buy the engine I've been looking for one for years any info would be much appreciated. Thanks
YEAH BOIIIII
Rob dahma approved
👍🏾👍🏾👍🏾👍🏾
Paint it orange and name it Dorito
It looks twisted up. Are you sure you want to do that? God speed boys.
turbo Turbo TURBO *TURBO*
and how are you running the motor to wheel with sprocket on wrong side of rear wheel? just a question is all
Part 2 we’ll be adding a jackshaft
Nice! Sprocket on the wrong side?
We’ll be adding a jackshaft in Pt. 2
Build Break Repeat ahh yes. Good idea. Love the rotary!
I noticed that too I thought it was just for mocking up purposes
Back to the future
SHWEEEET !
If you looked at the thumbnail you'd see they used a jack shaft. The rim is not on backwards.
"I can't actually make anything, so I'll buy a bunch of prefabbed parts wherever possible and then some random bits together and call it job done."
Cool idea for a minibike, but I don't know if I enjoyed watching this.
Alex... aren't you mechanaclly minded ??.....Trev New Zealand
@@trevinskiking2165 I'm a bicycle mechanic, if that means anything. :)
@@Metal-Possum Yes.,do you think I'm sub normal bicycle mechanics should be able to make a tube framed mini bike from scractch or are you a modern " mechanic" - a parts changer , there's a difference to old school bike mechanics (no offence intended) what's the problem ? If you can fix an internal rear hub 3 speed gearbox from the '70's you should be ok , ??...Cheers Trev
I think it will need a wheelie bar!
Oooooo
Where did u get the engine
He looks like happy Gilmore in the beginning of the movie
Dorito powered mini bike
Holy shit talk about big hair!!
Someone know where i can get all the sealings for a km 48?
you guys need to get a tachometer to see how high it revs