You ever checked out a company called Dyno Cams? they grind cams and might be able to help you out so you don't run out ever. They make cams for small engines to your specs. mild to wild. They are in the south I could give you the address if you want it. I used them for my go kart alcohol racing cams.

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norms-iron-works.tripod.com
motor assisted bicycle engine headlights that work off of your white power wire. check it out