60cc BMX with Vertical Shaft Friction Drive
- Thread starter VlamBallas
- Start date
Dan
Staff
Yes Joe! Been looking for one for 3 yrs! Only "perfect" ones I have found are big bucks and cost prohibitive.
Got an old snow thrower and am someday gonna take it apart to see what the reduction is. My thinking is they are already mass produced and a dime a dozen as you can find old snow throwers being scraped or trashed.
Got an old snow thrower and am someday gonna take it apart to see what the reduction is. My thinking is they are already mass produced and a dime a dozen as you can find old snow throwers being scraped or trashed.
wayne z
Active Member
Most worm gears have a large reduction, and if you had only2 to 1 ratio you would need about a 5" pulley.
. Worm gears won't coast like normal gears,when you cut the throttle,the bike will stop fast.
Easier to find is a 1 to 1 ratio 90 deg box from a mower deck.
Might could adapt one from a small angle grinder, not sure of the ratio though
. Worm gears won't coast like normal gears,when you cut the throttle,the bike will stop fast.
Easier to find is a 1 to 1 ratio 90 deg box from a mower deck.
Might could adapt one from a small angle grinder, not sure of the ratio though
ferball
New Member
Just as a note for lawn mower engines, I remember reading somewhere once that many mowers use the blade to act as a counter balance to the flywheel, and is you plan on running it with out a blade you could/should install a different flywheel that takes into account the absence of the blade. I could be talking out my butt so any one feel free to jump on me and correct me if you know more about this..
VlamBallas
New Member
You are indeed correct dear sir. Though the motor runs without a flywheel, will have to see how it performs under load, before spending some dough on a heavier flywheel..
The build was slightly delayed due to the freeking cold weather, I dont have a workshop and working outside was painfully cold.
Tonight my engine is going on the mount. Had a tough time finding the right material,
The build was slightly delayed due to the freeking cold weather, I dont have a workshop and working outside was painfully cold.
Tonight my engine is going on the mount. Had a tough time finding the right material,
NEAT TIMES
New Member
Vlam
It is cool having a member from your location and doing a build thread also!! Thanks for sharing it with us. Enjoy.
Ron________________
It is cool having a member from your location and doing a build thread also!! Thanks for sharing it with us. Enjoy.
Ron________________
VlamBallas
New Member
Thanx NEAT TIMES,
Though this build is a serious pain in the cheeks most to the time, spend a lot of time swearing at the thing lol, I think its gonna be so worth it in the end.
The biggest pain, is trying to get that blade head? off the shaft, i can get it to budge, not even a millimeter. Any suggestions?
COMPLETELY UN-RELATED
But still fun, My first kit build.
My boss brought the thing to work today, and I volunteerd to put it together for him.
I gotta say, kit builds are pretty shweet, very easy to build. Took me but a few hours to get it up and running.
This is a 66cc, Personally I prefer a little more juice. This one doesn't have much kick.
Though this build is a serious pain in the cheeks most to the time, spend a lot of time swearing at the thing lol, I think its gonna be so worth it in the end.
The biggest pain, is trying to get that blade head? off the shaft, i can get it to budge, not even a millimeter. Any suggestions?
COMPLETELY UN-RELATED
But still fun, My first kit build.
My boss brought the thing to work today, and I volunteerd to put it together for him.
I gotta say, kit builds are pretty shweet, very easy to build. Took me but a few hours to get it up and running.
This is a 66cc, Personally I prefer a little more juice. This one doesn't have much kick.
cannonball2
Well-Known Member
I have pulled em with a gear puller. Bottom a high strength bolt in the shaft leaving enough bolt above the blade adapter to allow the adapter to move and pull in a normal fashion. Heat helps, but becareful of the crank seal. It also helps to drill a depression in the bolt head to keep the puller centered. Next move is to split it with a die grinder.
VlamBallas
New Member
Sounds like a plan. We've got a hub puller at work, should do the trick. So far I'm hoping I dont need to grind it off, thats the last option..
rustycase
Gutter Rider
I recall, in the past, cutting the shaft above that mounting hub.
Without benefit of an effective right-angle drive, repurposed from something else, I would consider a long belt to make the transition from vertical to horizontal. It does work, and excessive power is not lost.
You could employ a pusher-trailer.
Good luck with your project!
rc
Without benefit of an effective right-angle drive, repurposed from something else, I would consider a long belt to make the transition from vertical to horizontal. It does work, and excessive power is not lost.
You could employ a pusher-trailer.
Good luck with your project!
rc
VlamBallas
New Member
Due to the serious lack of funds for this project, I decided to go sponge of the steel and tools at work, and go with the simpler is better approach. Made some good progress today:
Drilled out 2 shweet pieces of rubber, to be used on the roller. Measuring 2" in diameter, I have yet to drill out the center, but cant find the rights size bit.
Finished the engine mount, and built the sliding clutch, fitted the springs. Works very well.
Closer look at the clutch, as it should engage the wheel
Closer look at the clutch. as it should disengage.
Next stop will be to fit the whole assembly to the bike. And attempt to connect the clutch cable to the slider. More updates soon!
Drilled out 2 shweet pieces of rubber, to be used on the roller. Measuring 2" in diameter, I have yet to drill out the center, but cant find the rights size bit.
Finished the engine mount, and built the sliding clutch, fitted the springs. Works very well.
Closer look at the clutch, as it should engage the wheel
Closer look at the clutch. as it should disengage.
Next stop will be to fit the whole assembly to the bike. And attempt to connect the clutch cable to the slider. More updates soon!
NEAT TIMES
New Member
Vlam
neat & clean looking mount!
Ron
neat & clean looking mount!
Ron
cannonball2
Well-Known Member
Intriguing to say the least! The crank could be a 7/8", however Hondas were also 25mm, I guess it depends on how close the engine was cloned.
VlamBallas
New Member
It is indeed a 7/8" crank, the problem is finding something stuff in that size.. As everything is in metric sizes..
cannonball2
Well-Known Member
22mm should work.
VlamBallas
New Member
Put the whole drive together today, with the excption of the roller, clutch worked pretty well. 'till I realised I had the thing mounted on the wring effing side, So that'll take a good few hours to properly fix.. Swapped it around, to the right side, but that takes away most of the space needed for the roller.
So next few days will be fixing todays mess, lol.
NEAT TIMES
New Member
Vlam
Yes the rotation is confusing, fools a lot of people. I had a buddy build a backwards bike !! Was not what he wanted. It has happened to others, your not alone.
Ron
Yes the rotation is confusing, fools a lot of people. I had a buddy build a backwards bike !! Was not what he wanted. It has happened to others, your not alone.
Ron
NEAT TIMES
New Member
DAN
I feel proud to know you, don`t know of anyone else that could do that with a throttle. Can you post some pics.
thanks, Ron
I feel proud to know you, don`t know of anyone else that could do that with a throttle. Can you post some pics.
thanks, Ron
Dan
Staff
Really gotta make me relive this, eh? Really was funny, even at the time. No pics but reported my self
;http://motorbicycling.com/f37/new-honda-50-a-6577-2.html#post67453
"Removed the governor. Built a really cool and elaborate throttle with great/perfect back tension. It had a pulley wheel guide. It was perfect and looked cool. I finished every thing today and carried the point beach/honda/grubee up from the celler. So dang proud of my self. Then I grabbed the pull cord and had that old fimaliure thought and feeling. "What if it won't start" Imeaditaly followed by; "what if it does" Snork.
It roared to life on the first pull. Then just went full bore. Smoke came from the gear box and the rear tire spun madly. I quickly shut it down. I turned the idle screw down and fired her back up. Same thing.....
Go look up the carb in the manual. Nuton. Look all over the carb and feel with my hands looking for some mechinisum to slow it down. Nuton.
Carol is looking on with great pity and concern and offers to hold the bike while I try to start it again. As I bend to give her a yank (the bike, not Carol) it dawned on me. I fire her up and twist the throttle. She calms right down. My Beautiful and awesome throttle assembly is bassackwards"
The cool part of mistakes like that, is ya never do it again. Well, for the most part, lol.
;http://motorbicycling.com/f37/new-honda-50-a-6577-2.html#post67453
"Removed the governor. Built a really cool and elaborate throttle with great/perfect back tension. It had a pulley wheel guide. It was perfect and looked cool. I finished every thing today and carried the point beach/honda/grubee up from the celler. So dang proud of my self. Then I grabbed the pull cord and had that old fimaliure thought and feeling. "What if it won't start" Imeaditaly followed by; "what if it does" Snork.
It roared to life on the first pull. Then just went full bore. Smoke came from the gear box and the rear tire spun madly. I quickly shut it down. I turned the idle screw down and fired her back up. Same thing.....
Go look up the carb in the manual. Nuton. Look all over the carb and feel with my hands looking for some mechinisum to slow it down. Nuton.
Carol is looking on with great pity and concern and offers to hold the bike while I try to start it again. As I bend to give her a yank (the bike, not Carol) it dawned on me. I fire her up and twist the throttle. She calms right down. My Beautiful and awesome throttle assembly is bassackwards"
The cool part of mistakes like that, is ya never do it again. Well, for the most part, lol.