Briggs and Stratton Bike

Here's another Briggs & Stratton FWD bike. YouTube - homemade moped, front wheel drive motorbike
This video is nearly 20 yrs. old now.
The bike is made of bed frame "angle iron", 4 hp B&S, a kart/minibike clutch and a rear minibike wheel.
The only problems it has is that vibration reduces the life of headlight bulbs and makes rear view mirrors useless; both solvable problems. A vertical chainline makes chain tension more critical. I should add a tensioner but I use shims under the engine instead.
Click "more from dennbecr" on the Youtube page to see a pusher trailer, skate pusher & sailbike.
 
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The French built Solex bikes were front wheel (FRICTION) drive with a 50cc 2 stroke. I am in the final stages of restoring one - will post some pics when done. Probably not as much torque as that beast you have however...
 
I like the idea of putting the pulley on the outside of the fork, guess that would work on the back too. The local hardware store has a lot of different sizes of those pulleys but it's hard to find the tin bolt to the spokes pulleys. I was thinking about welding 2 rims togather , using one for the tire and the other for a pulley. 20 mph is fast enough for me on a bicycle.
 
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