I once asked Mike Hodgert about using bike chain and he told me that "bike chain "flexes" too much and tends to cost power... as well as jumping off sprocket"

Now I have never used bike chain, but after aprox 20 years of experience I imagine Mike has a good idea about this so I believed him

almost everybody out here in the pacific northwest uses #35 chain.

Most of us use ETek motors and with that much power bike chain tends to snap. Bike chain is meant for the average human leg power not 2 hp. I have seen good athletes snap a bike chain and I have seldom seen any electrathon car make it through a race with bike chain.

The Super Coupe came with bicycle chain but it keep coming off under hard cornering. We switched to#35 go kart chain. We took a standard go kart hub and drilled it so it would bolt to the standard bicycle 6 hole disc brake hub. Different size go kart gears are cheap and easy to order.

i do not recommend bicycle chain but if you decide to try it, what is the diameter of the motor shaft? I think I keep the old sprockets.

Thanks for all your help, I've never made an Electrathon form scratch before, the one in my profile picture was made about 4-5 years ago by some of my schools alumni. When we got it it had a chain and the alumni told us not to touch it. Little did we know the sprocket was off center and rolled like an egg. It also had a very unique chain size. Thanks for all your help, ill defiantly look into the go-kart chains.