S
sunofjustice
Guest
Originally, the idea to mate a pocketbike engine via p.b. sprocket and chain TO a used "happytime"(sans upper cyl, rod and crank).............using JUST the gearbox portion of the engine casing was my idea. This would allow usage of a 26" bicycle wheel ...........the usage of various pocketbike sprockets to fine-tune the gearing...............and still use a mountainbike frame. I admit to procrastenating ..........about putting this post up.......but the bike I wanted to try this on......I was peddling to work with until I get my blue oni 's (other 70cc mtb) "franken engine" back together again. (new bushings dont fit) Anyway............the drive sprocket on the pocketbike (p.b.) drives the p.b. sprocket ( probably 80t to 98t)..........the sprocket would need an adapter of some sort to mount it to. On my p.b. spoiler project.....................I used a lawnmower pulley and CUT a smaller pulley out of it with a dremmel .......and bolted it to the rim. Using this same method.........an adapter can be bolted to the happytime block.......where the magneto magnet once resided. A heavy duty bolt.........would then be used to mate the small bevel gear on the happytime................to the p.b. sprocket. I've been thinking about this scenario alot.............since most other engines need either: a 20" wheel, a rack/mount ring drive , or jackshafts requiring welding. I rather come at a problem .........with LOW BUCK/ HIGH CONCEPTS.