Right Tom it's based on a modified Sportsman flyer frame. I cut the loop out, & used Pat's Harley bar & tank with 125cc 5 speed trans & Simplex dual spring fork. Both it and my Simplex use the Honda pushrod 125cc clone. The Peashooter has more engine mods & makes a lot of power. I designed a working "keystone/Marion" functional engine mount that drops with the engine and trans in one piece like the original race bikes. This bike and the Simplex (same motor but makes a few less horsepower, about 11 hp or so) both bikes can be pedaled, but are really small motorcycles riding on bicycle tech. I might one day change the rolling parts for motorcycle speed rated hub, brakes and speed rated tires. Really prefer the look of the bicycle stuff however.
The Harley is great fun, much lighter than the duplex framed Simplex & lively to ride, but with the stub exhaust ...it's a cop agitator so I seldom ride her. The Simplex with milder cam, compression and carb is easy to ride a slow speeds and just makes a throaty growl up to the point it comes on cam. I still want to put a sidecar on the Simplex. Just not bad enough to get on with it!
Rick C.