i think the 20" wheels takes away from some of the top speed because most bikes with 24" or 26" wheels seem to get a little more top speed than what we're getting with the 20" wheels. the problem is that a lot of the engines stamped 48 and 49cc are actually 72cc, when you remove the head you can measure the bore size and you will notice that almost every engine stamped 48cc that I have come across is actually 72cc.

Similar to an engine for a scooter or goped, you simply pull the starter chord and hit the throttle to go!c. = more bottom end torque) but i can catch him once we get going and stay side by side with him at 25-28 mph. Is it needed to have a freewheel attached to the sprocket, as on many bikes, or can the sprocket be attached straight to the back wheel?

I usually answer questions and help people in this forum in the evening, so if you let me know that you purchased the kit online through this forum I may not see the message in time. Also, will the predicted battery time /mileage be increased Significantly in general from coasting, and if so by how much?If you play around on the calculator with the weight of the vehicle you will notice that it has no effect on the power that is required on flat ground to propel a vehicle at any speed. Also, I am unsure how to connect the fuse to the battery pack and in general, wiring the fuse, key switch, battery pack, and controller together.

Disclaimer: Operating a bike, motorized bicycle or bike with a bicycle engine kit installed involved some risk of serious bodily injury.Now I know I can just replace the 38mm cylinder and bore easily, however, I was wondering if this would be a good time to try to upgrade to a 44mm big bore kit. I can make the kit without the sprockets and chain and you could decide on that when you pick the kit up if you want.