Grubee SkyHawk 4G T-Belt Drive V-Mount Kit, With HuaSheng 49cc Engine

I will chime in. Although a search of this forum would educate you. The engine from gasbike as of recent has some changes. They only rev to 6900 RPM VS 8200 that they should. In oorder to achieve the capable rpm of their motor you will need to order another flywheel and cdi to eliminate the rev limit. Also order another carb. I dunno if its just a smaller jet or not but it is dif also. A flywheel 26.95 cdi 16.95 carb 26.95 and you will have an engine running like bicycleengines.net. although I don't like the 5/8 shaft motors with the 4g box. Clutch is horrible on takeoff and clutch bell noisey at idle. I would go with dax motor then 4g for tapered shaft. Smooth and quiet. Unless you want to put yourself into a higher price bracket.