Sounds ominous.. Hi, my name is Lewis, I'm building an old bike that I've had since '97 into a motor assisted bicycle. The bike itself being an 1987 Nishiki 26" wheel size, 21" frame size commuter that I've hacked into a beach sand rider . I'm also using an old 2 cycle engine I've got on hand, an early 80's vintage SRM-Echo 30 cc weedeater engine. It has a built in auto clutch and is in pretty good condition, plus there's a few replacement bits to be found on Ebay to keep it running for a few years. The build is already been in slow, methodical development. It's going to be set up as a friction drive using a bike rack on the back with a jackshaft/belt reduction to a bearing carrier/friction drum, with some modifications to the rack and bike frame that allow the bike to be put back into a pedal power with the removal of a few bolts and nuts, I want just a single engine control, (throttle) while keeping the rack and the rest of the bike unaffected. The engine is old school in power and running about 1.0~1.1 HP and more of a low speed torque engine than a high RPM like the Tanaka's and Mitsu's. It has a big flywheel cooling fan and heavily shrouded engine, it's never had any cooling problems. Not that Oregon that this would be a problem, our biggest worry here is the salt air and damp. Cheers!