Friction mounts

[gphil]

My son has several good small engines 25cc's whatever. Wants to make a friction drive . I have no knowledge of these. I would guess the roller has to be a certain size for the engine etc. Anyway where to start looking for the engine mounts? As mentioned earlier, he has the engines and I said would try to steer him in the correct direction on getting a mount and here guessing rear drive. Thanks and hopefully you can point to a jobber who handles these. gphil.

 

[Agreen]

I made a friction drive 25cc weedeater once. Not the most thrilling ride, but enough for a few kicks. I forget how it mounted, but i made a sort of scissor pivot for the motor. There was a lever on the side, like a suicide clutch for engaging/disengaging the drive roller from the wheel. The roller was just a plain 7/8" socket attached to the flywheel.

It didn't last long. The amount of pressure required to keep the socket from free spinning was a lot, which fatigued the crankshaft and eventually broke it. It was awesome. Parts went everywhere. The flywheel came off and whizzed down the street in front of me.

 

[Trey]

Many different ways to accomplish this can be found here;

http://motorbicycling.com/forumdisplay.php?f=6

You'll have to sift through it all to find what will work for you.

Good luck, and keep us posted.

 

[curtisfox]

Welcome aboard. There are a lot of friction drive builds. Cannenball has done a lot
http://www.google.com/cse?cx=partne...495#gsc.tab=0&gsc.q=cannenball friction drive and there is a friction drive section...........Curt

 

[Trey]

Well damn... there is a friction drive section. I thought I looked.
Thanks Curt!

 

[curtisfox]

What is Kool is cannenball has built a new one using a three speed hub as a drive roller,and Silverbear has fallowed and built his version................Curt