This is the kind of videos this community needs!!! Lots of people are scared of digging into their motors because they think it's a swiss watch with over 1000 moving parts. 20 thumbs up on this teardown.
Plain simple language w/o making the viewer feel like a child. Thanks so much for a great video. Watched 3 or 4 like this, altogether, this one gave me the confidence to go get er done.
Another tip buddy instead of heating the bearring housing put the bearings in the freezer overnight. Next morning pop right in almost no effort at all.
That's a fantastic method, but personally, I like to send my berrings to Antarctica and wait 3 years for them to be sent back, then freeze them in liquid nitrogen, THEN pop em' right back in.
This may be an old video but it's well worth it I just had to switch back over to a two-stroke after my four took a dump. If you know 2 strokes but watch this for a refresher play it at 2x speed trust me 😉
Great explanation, great camera view, very thorough, you didn't speed through. Thanks brother. I'll give you a A++ Viewed from over in Michigan. Great idea to with heating the housing up for the bearing to go into. That's using the ol nugget!!
How should i seperate the crank so i can replace the needle bearing? Do i need a press? Is there any other methods an average do it yourself with limited tools can use to get the job done?
Thank you bro I always thought taking a motor apart was some big complicated job I e never done it before was always scared to but now I watched this and it's that easy?? Thanks for the info much appreciated 👍
Thank you for making this video. Somehow got part of a piston ring inside the crank and froze the engine. Now I have to take it apart to get all of the pieces out.
Thanks for the video! I've started taking my motor apart but haven't finished yet! I've lost my bike so, that's probably why I haven't finished taking it apart! I'm not happy about that either! Because I had a lot of money into it
How you knocked out the clutch assembly from the drive side, can you do the same from the clutch gear? Such as leaving the drive gear alone (not taking the nut off either) and taking the clutch gear off and tapping it from the clutch gear so it comes out from the drive side
hay rob josh from the group...love how your describing each part of the video. Only thing is you could have explained each part to mod....maybe for another part?
I really enjoyed this breakdown of this engine I’ve broken down plenty of engines before like this the one thing that I’m tripping out on is where and what type of crank cases are those. They are beautifully colored crank cases Plus I don’t even know what the heck they’re called?????? I have looked up 80cc intake crankcases But nothing shows I would like to put a water cooled Engine cylinder head on my 2-stroke 80cc, but I need a crank case intake which seems impossible to find. HELLLLLLLLLLp!!!!........
I was taking mine apart (thank god for your video) but had a garter spring fall out at some point during splitting the crank. Do you know where it belongs to?
Rob, I've decided to finally build one of these engines myself, and you are literally the only person I'd ever take advice from concerning these engines, would you please tell me where I can get the best quality bearings possible for this engine?, thanks for sharing.
Hey my big gear ⚙️ and the shaft won’t come out dosent matter how har I hit it and it spins freely I smash it so hard I’m almost messing it up I don’t know what do do it’s just completely stuck in there almost need a hydrolic press to push it out
Heyyy soooo my motor had 2 thick washers and not a half thickness one on the magneto side. I wonder if you've ever seen that. Or if you as a builder think that's it's better to use 2 thick ones instead
My motor was top speed at 32 mph but when was ride at top speed it started to slow down now it only top speed is 22 mph do u know what the problem can be.
Have you ever done any work to the bottom end I’m getting a dio reed valve kit and wondering what I can do to my bottom end while I wait for my dio reed kit to be delivered
I know this is a late response to your post, but i have built a few of these motors for some kids that live close by. Try doing some case porting to match the transfer ports on the cylinder. I got one motor doing 47 mph with porting the cases and cylinder, plus an after-market exhaust pipe. I went up 2 sizes on the main jet and dropped the needle ( raised the clip ) on the carb one notch. The motor is reliable, but it is dangerous to ride at that speed because of the lack of brakes. Brakes on bikes are not made to stop a bike doing 47 mph. By the way i am a certified motorcycle and jet ski mechanic with numerous pro championships on motors i have built for racers. Jet Ski motors raced by my brother Tommy (the Bomber) Bonacci has 6 titles on my motors. Jeff "Chicken" Matiasevich (motocross and supercross) has a 125cc championship and a few wins in the 250cc class on the national events.These little bike motors and other motors always have room for improvement. Just be careful doing porting if you are not sure what you are doing because once you remove material you cant put it back.
The bt engines are really good long lasting engines I can't wait for them to come out with a 52 mm piston and a 54 mm piston set up my bullet train would still be running if I didn't get caught in the rain storm and burned the piston rings I was going like 4 miles full throttle
I watched the other video where you drilled the holes to balance the crankshaft. The motor o have is one of the cheap 80cc eBay engines, it’s the long rod 38mm stroke with the wrist pin that’s higher up.
These motors are assembled dry from the factory. You could add a couple drops of premix oil to each bearing and smear a little bit on the cylinder bore. That's what I've always done without knowing any better and I've never had an issue with my own builds.
Make sure you use a clamp mounting the carb to the frame after the hose, and maybe even clamp it off again between the carb and filter. I've seen a few race vids showing losses just because the carb popped off. It's a simple fix that costs a couple ounces.
I also appreciate your tips but for a minute I thought something's wrong with my phone but I guess you recorded it where it looks upside down.Thanks though bud.
So what happens if the threads on the small drive gear are stripped and your puller tool won't grip the threads how would you go about removing the Gear as it seems like it's seized on?
I have a question for you I Bought one of them new minaralli hybrid engine and stripped the engine block hole question 1 can I use a piece of 1/4 thread all stock course thread from home depo after drilling out a little bigger and re threading it or other idea was to drill it out and use a heli coil another TH-camr suggested drilling it out to 8mm but then I would have to drill out the cast iron cylinder all I got is a dam good cordless drill if that will work any assistance would be greatly appreciated thanks
If ya got any little machine shops around where ya live take it there. They have the proper tooling to do the job, and it will comeout looking great. Shouldn't cost ya a arm and.leg.either. I used to work at a machine shop where I live in Michigan and we used to get jobs like this off the street all the time. Look into it, you'll be happy ya did.
@@davidkooi9373 my friend I had to use a heli coil and it fixed it and then I did another one wasn't as good as the first one but it worked we have 2 machine shops nether one wanted to mess with it I even was going to ditch the 6mm stud bolts and put 8mm lesslikley to strip them out NOPE wouldn't even let me use there drill press and I'd pay them so I remembered when I was younger I stripped out a spark plug hole on my dirt bike and the macanic put in a heli coil and it worked that's where I came up with the idea but thanks for your help anyways stay safe
Now I could probably make and customize a case like the ones in the pic of this video but to be fair it wouldn’t be as purdy without the proper tools. How do I acquire such beauty to up my level of customization and color? Please 🙏
Hey man my sons racing one of these engines in his x1 pocket bike the thing moves and we are going to race it at Sandyhook. Lmk if you want to send us an engine and we can run your decal on our bike. Good luck and God Bless. Sincerely Richard
I could mount an 80 cylinder and piston on a 100 engine because in Romania there are no 100 cylinder and pistons, I want to point out that it fits in holes only that the 100 cc cylinder and piston is 50 mm and the 80 cc has 47mm? .
do you let your viewers that are not mechanically inclined? send you there 80cc motor for a video because I just got one and it runs but it's in parts I don't have time to mess with it however would you let me send my motor to you to fix.??? not sure how that works please let me know. I got a bike cycle to mount it to after and what would you charge me to do so and by the way love the videos bro.
the nut is soo tight that it walled out my tool and my shaft. it wasnt even the threads that was the problem. i cannot believe this. now i got to find a strong washer that fits in the tool in hopes i can get the bearing off.
Would you guys ship to New Zealand, I want to buy a decent quality kit as I pretty much got scammed by a local seller. Ended up paying 260 nzd for a 70cc engine that had 6mm studs and a nt carburetor :(
This is the kind of videos this community needs!!! Lots of people are scared of digging into their motors because they think it's a swiss watch with over 1000 moving parts. 20 thumbs up on this teardown.
Daniel Garris thanks man
This is my go to study guide everytime im about to do a rebuild .
its a good video
Plain simple language w/o making the viewer feel like a child. Thanks so much for a great video. Watched 3 or 4 like this, altogether, this one gave me the confidence to go get er done.
Zeke NoScooter_8 you’re welcome. Thanks for watching
This man knows exactly what he is doing and talking about..for sure
Thanks man
Thank u bro we need Your tips
Another tip buddy instead of heating the bearring housing put the bearings in the freezer overnight. Next morning pop right in almost no effort at all.
I think it's a little faster to just heat it up
@@giovanniminotte2951 Or you can toss the bearings in the freezer right when you pull em out?
I'm a big fan of using the freezer to make things fit :P
That's a fantastic method, but personally, I like to send my berrings to Antarctica and wait 3 years for them to be sent back, then freeze them in liquid nitrogen, THEN pop em' right back in.
@@issaacxxx6202 damn you made me spill my coffee I laughed so hard.
Ive done a few engine rebuilds, and I really wish i had known some of these tips long ago lol! Thanks a lot!
Nicholas Boettcher no worries. Hope it makes it easier
I kid you not, this is theasiest and most simplest video to do follow. Thank you
This may be an old video but it's well worth it I just had to switch back over to a two-stroke after my four took a dump. If you know 2 strokes but watch this for a refresher play it at 2x speed trust me 😉
Great explanation, great camera view, very thorough, you didn't speed through. Thanks brother. I'll give you a A++
Viewed from over in Michigan. Great idea to with heating the housing up for the bearing to go into. That's using the ol nugget!!
Hope it helps some of you
Hey dude are the clutch slammer tools sold out
How should i seperate the crank so i can replace the needle bearing? Do i need a press? Is there any other methods an average do it yourself with limited tools can use to get the job done?
I can't wait to get my new motor from you... Happy new year Rob man.
Definitely will be saving this video in my favorite tab. Thanks for sharing sir!
The ONE Having The Key glad you enjoyed it
Thank you bro I always thought taking a motor apart was some big complicated job I e never done it before was always scared to but now I watched this and it's that easy?? Thanks for the info much appreciated 👍
Bro I been a 2 stroke fan since I can remember and man I love the simplicity of these engines I just wish they would make them with better quality
Thank you for the tips, extremely helpful.
Thank you for making this video. Somehow got part of a piston ring inside the crank and froze the engine. Now I have to take it apart to get all of the pieces out.
Damn I wish there was more videos like this one teaching how to do the motors clean apart.
Thanks for the video! I've started taking my motor apart but haven't finished yet! I've lost my bike so, that's probably why I haven't finished taking it apart! I'm not happy about that either! Because I had a lot of money into it
Thanks Rob.
this is an excellence video .thumbs up.
Awsome tutorial brother subscribing
no problem boss
I'll absorb the info for the future, thanks, and oh yeah ima need that gold cnc case u got their buddy, 😆
squad. u the man rob.
Awesome video thanks!!!
cool Vidoe , Thanks For the content and Tips
Thanx, very constructive.
it killed me when he said "super simple" at the end
Great stuff, subscribed. To put the jug back on the piston does it just slide back on or do the rings need to be compressed?
Thank u for the info
Thank you
You can also use a rubber mallet to remove the clutch rod assembly without mucking up the edges.
Thanks
Bro, Thanks
Very helpful video.😁
How you knocked out the clutch assembly from the drive side, can you do the same from the clutch gear? Such as leaving the drive gear alone (not taking the nut off either) and taking the clutch gear off and tapping it from the clutch gear so it comes out from the drive side
Zeda Motorsports When you were removing the clutch what tool did you use?/what brand/model is it?
What a great video! Any chance you'd make an assembly video?
is there a governor in 80cc or 100cc engines? if so where are they and what do they look like?. can i take them out?
Do a vid of your daily work process that would be cool
Thx 👍🏻
Were did you get that purple lower case at were can I order one from
hay rob josh from the group...love how your describing each part of the video. Only thing is you could have explained each part to mod....maybe for another part?
my engine proper mechanically broke today, going to to her apart to see what broke! exciting
Do you mind telling me we’re you got the aluminum body from ?
I really enjoyed this breakdown of this engine I’ve broken down plenty of engines before like this the one thing that I’m tripping out on is where and what type of crank cases are those. They are beautifully colored crank cases Plus I don’t even know what the heck they’re called?????? I have looked up 80cc intake crankcases But nothing shows I would like to put a water cooled Engine cylinder head on my 2-stroke 80cc, but I need a crank case intake which seems impossible to find. HELLLLLLLLLLp!!!!........
Man where can I get a red anodized case like those on your desk?
I was taking mine apart (thank god for your video) but had a garter spring fall out at some point during splitting the crank. Do you know where it belongs to?
We're can I find these beautiful blocks for the 2 stroke chinadoll
Rob, I've decided to finally build one of these engines myself, and you are literally the only person I'd ever take advice from concerning these engines, would you please tell me where I can get the best quality bearings possible for this engine?, thanks for sharing.
A bearing shop will match these bearings for you 😊
Hey my big gear ⚙️ and the shaft won’t come out dosent matter how har I hit it and it spins freely I smash it so hard I’m almost messing it up I don’t know what do do it’s just completely stuck in there almost need a hydrolic press to push it out
How do you take the top off if it has no head bolts
What can I do if the drive sprocket is bent the tool doesn’t go in
should i grease the inner clutch bearings........ ....
Also I’m using a Mikuni carb and my motor is like the Frankenstein
what type of engine is that? do you know which model. i'd like to get one like it
How do I take lower crank arm needle bearing out
whats the tool that u use to get the gears out.
Is there a gasket for the crank vase
My clutch doesn’t have a bucking bar. Can somebody please tell me why. I don’t understand how the clutch will engage without the bucking bar
Hey man, why the heck does it look like there’s 2 gaskets (one one each side) for the crank case?
Please tell me we're I get the custom block
Bro what are the bore and stroke specifications
Heyyy soooo my motor had 2 thick washers and not a half thickness one on the magneto side. I wonder if you've ever seen that. Or if you as a builder think that's it's better to use 2 thick ones instead
Where can I get one of those anodised crankcases?
My motor was top speed at 32 mph but when was ride at top speed it started to slow down now it only top speed is 22 mph do u know what the problem can be.
Have you ever done any work to the bottom end I’m getting a dio reed valve kit and wondering what I can do to my bottom end while I wait for my dio reed kit to be delivered
I know this is a late response to your post, but i have built a few of these motors for some kids that live close by. Try doing some case porting to match the transfer ports on the cylinder. I got one motor doing 47 mph with porting the cases and cylinder, plus an after-market exhaust pipe. I went up 2 sizes on the main jet and dropped the needle ( raised the clip ) on the carb one notch. The motor is reliable, but it is dangerous to ride at that speed because of the lack of brakes. Brakes on bikes are not made to stop a bike doing 47 mph. By the way i am a certified motorcycle and jet ski mechanic with numerous pro championships on motors i have built for racers. Jet Ski motors raced by my brother Tommy (the Bomber) Bonacci has 6 titles on my motors. Jeff "Chicken" Matiasevich (motocross and supercross) has a 125cc championship and a few wins in the 250cc class on the national events.These little bike motors and other motors always have room for improvement. Just be careful doing porting if you are not sure what you are doing because once you remove material you cant put it back.
The bt engines are really good long lasting engines I can't wait for them to come out with a 52 mm piston and a 54 mm piston set up my bullet train would still be running if I didn't get caught in the rain storm and burned the piston rings I was going like 4 miles full throttle
I watched the other video where you drilled the holes to balance the crankshaft. The motor o have is one of the cheap 80cc eBay engines, it’s the long rod 38mm stroke with the wrist pin that’s higher up.
Same thing
Great Video! When its all back together what kind and amount of oil do you suggest for the bearings and crankcase??
🤣🤣🤣
These motors are assembled dry from the factory. You could add a couple drops of premix oil to each bearing and smear a little bit on the cylinder bore. That's what I've always done without knowing any better and I've never had an issue with my own builds.
so you pretty much beat the clutch gears back on with a rubber mallet?
Could you tell me how for you would recommend mounting a carburetor behind the motor with a rubber hose.
Make sure you use a clamp mounting the carb to the frame after the hose, and maybe even clamp it off again between the carb and filter. I've seen a few race vids showing losses just because the carb popped off. It's a simple fix that costs a couple ounces.
TLDR: Just like you don't want your exhaust to hang too far without bracing, the same goes for your intake.
I also appreciate your tips but for a minute I thought something's wrong with my phone but I guess you recorded it where it looks upside down.Thanks though bud.
Can you do a video how to install a new clutch shaft
Where can I buy the anodised engine housings
What case is that in the background
Do I have to grease the bearings
So what happens if the threads on the small drive gear are stripped and your puller tool won't grip the threads how would you go about removing the Gear as it seems like it's seized on?
Try heating it up.
What is the clutch removal tool??
Awesome video and awesome tool you created for nocking out the clutch shaft. How did you make that tool?
green machine55 cut down some straight bar on the lathe
I have a question for you I Bought one of them new minaralli hybrid engine and stripped the engine block hole question 1 can I use a piece of 1/4 thread all stock course thread from home depo after drilling out a little bigger and re threading it or other idea was to drill it out and use a heli coil another TH-camr suggested drilling it out to 8mm but then I would have to drill out the cast iron cylinder all I got is a dam good cordless drill if that will work any assistance would be greatly appreciated thanks
If ya got any little machine shops around where ya live take it there. They have the proper tooling to do the job, and it will comeout looking great. Shouldn't cost ya a arm and.leg.either. I used to work at a machine shop where I live in Michigan and we used to get jobs like this off the street all the time. Look into it, you'll be happy ya did.
@@davidkooi9373 my friend I had to use a heli coil and it fixed it and then I did another one wasn't as good as the first one but it worked we have 2 machine shops nether one wanted to mess with it I even was going to ditch the 6mm stud bolts and put 8mm lesslikley to strip them out NOPE wouldn't even let me use there drill press and I'd pay them so I remembered when I was younger I stripped out a spark plug hole on my dirt bike and the macanic put in a heli coil and it worked that's where I came up with the idea but thanks for your help anyways stay safe
Now I could probably make and customize a case like the ones in the pic of this video but to be fair it wouldn’t be as purdy without the proper tools. How do I acquire such beauty to up my level of customization and color? Please 🙏
I can't get the engine block to slide off only the top part with the spark plug
What happened to Iron sleeved cylinder?
Hey man my sons racing one of these engines in his x1 pocket bike the thing moves and we are going to race it at Sandyhook. Lmk if you want to send us an engine and we can run your decal on our bike. Good luck and God Bless. Sincerely Richard
I could mount an 80 cylinder and piston on a 100 engine because in Romania there are no 100 cylinder and pistons, I want to point out that it fits in holes only that the 100 cc cylinder and piston is 50 mm and the 80 cc has 47mm? .
my crank on the side of the mag is stripped, dont know what I can do now.
Just bought one of these engines for my bike. Kinda wish they had a centrifugal clutch, that would make them a bit easier to use.
You can get the centrifugal clutch on ebay for like 40 dollars last i checked.
Only one spacer/shim on that one side of the crank???
do you let your viewers that are not mechanically inclined? send you there 80cc motor for a video because I just got one and it runs but it's in parts I don't have time to mess with it however would you let me send my motor to you to fix.??? not sure how that works please let me know. I got a bike cycle to mount it to after and what would you charge me to do so and by the way love the videos bro.
You said it’s a m8x10 nut for crank shaft and magneto nut
Cool
Grip it, rip it, watch it go!
damn my engine keeps breaking
Grade 8 m6 bolts hold up as good as a mild steel m8
the nut is soo tight that it walled out my tool and my shaft. it wasnt even the threads that was the problem. i cannot believe this. now i got to find a strong washer that fits in the tool in hopes i can get the bearing off.
how much does it cost for you to make such an engine for me?
Dude you're the shit
Would you guys ship to New Zealand, I want to buy a decent quality kit as I pretty much got scammed by a local seller. Ended up paying 260 nzd for a 70cc engine that had 6mm studs and a nt carburetor :(
tree man yes we ship all over the world
Great videos se learn more about they dissasemble thanks hope a vídeo well explained ay your assemble thanks Mr,Say hello Joe & Bros ,suscribe.
Why do you have 12 motors to take apart? Are you going to modify new motors in some fashion?