Might as well toss this up here! 
I've wanted to do this since I was a boy in the mid sixties. Now that I am past the bailing wire stage, thought I'd give it a go.
Schwinn mid size frame, stretched the drop out to fit a Moped 16" wheel. I wanted the drum brake, and standard sprocket. Mounted 20X2.125 BMX tires on it. Front end is the Monark you will find on Ebay for about $200. The seller is easy to deal with. The threaded neck he sent was too short, so he's sending another one. I machined some bronze bushings in the rockers, and will do the remaining rockers later. Front rim is used, but nice BMX 20" and sports the same BMX tire.
Engine is a 64 Briggs, one of two engines @superflea gave me last year. For a year, I thought it was a 5HP, but it's a 4, which are harder to find. Replaced every component in it, but the crank. Had to machine the crank end on the mag size because it was too long for the recoil ball clutch deal, and I had to machine that clutch deal as well, because the recoil drive hit it, and machined the recoil drive, so now it all fits together and rolls smooth. Need a couple more parts and I'll fire it up and finish sissifying it.
Seat post is cut. It will stay that way, probably a saddle type going on it. Down tube is cut, and I will reverse the piece I cut off and weld it to the down tube for a reverse curve to handle the weight of the motor plate in front. This will sport a jack shaft, but not sure yet on drive system.
I've wanted to do this since I was a boy in the mid sixties. Now that I am past the bailing wire stage, thought I'd give it a go. Schwinn mid size frame, stretched the drop out to fit a Moped 16" wheel. I wanted the drum brake, and standard sprocket. Mounted 20X2.125 BMX tires on it. Front end is the Monark you will find on Ebay for about $200. The seller is easy to deal with. The threaded neck he sent was too short, so he's sending another one. I machined some bronze bushings in the rockers, and will do the remaining rockers later. Front rim is used, but nice BMX 20" and sports the same BMX tire.
Engine is a 64 Briggs, one of two engines @superflea gave me last year. For a year, I thought it was a 5HP, but it's a 4, which are harder to find. Replaced every component in it, but the crank. Had to machine the crank end on the mag size because it was too long for the recoil ball clutch deal, and I had to machine that clutch deal as well, because the recoil drive hit it, and machined the recoil drive, so now it all fits together and rolls smooth. Need a couple more parts and I'll fire it up and finish sissifying it.
Seat post is cut. It will stay that way, probably a saddle type going on it. Down tube is cut, and I will reverse the piece I cut off and weld it to the down tube for a reverse curve to handle the weight of the motor plate in front. This will sport a jack shaft, but not sure yet on drive system.
