I am 2 weeks into slowly assembling my kit onto a 20+ year old bike. Have had some challenges but am taking my time. Reading lots of tips here in the forums. Thank-you all for the great information. I have the "80cc" unit from PowerKing or Zoom (whichever they are best known by). Already had to reverse the gear, adjust the clutch, replace a bad brake cable (brakes are a good thing I understand) picked up my loctite, modify front mount (frame diameter larger at front). I am at the chain stage and need to locate my dremel tool. Looking forward to completing soon. Plans are to add a boost bottle as well and a better seat for comfort. I hope to partially commute with it once completed.