We just completed the Grubee Skyhawk installation of the engine and kit on a Diviate Nerve bike (the very last one available from the factory) and it went great. The H engine started on one pull, ran smooth, throttled smoothly, and was surprising quiet. Much less than a lawn mower. I used only grease on the internal gears. It all worked well excpet for the kill switch, which seemed to be shorted out, so we removed it. We are working on solving the lighting problem and have a little ways to go. At the end, we expect to have a street legal kit to offer full lighting/horn-turn signals, the works, so the bike may be licensed to ride anywhere as a moped. Mike S