Originally posted by RPC
and is a xxx-s spur gear the same as the xxx-4? if not it has a blue spur gear in it does anyone know what tooth that is?, thanks.
Nope, they are different. The XXXS uses the spur gear and the drive pulley molded together (unless you get aftermarket gear adapters) and the XXX4 uses a spur gear with a slipperhub and drive pulley attaching to it. If it is a 64 pitch it would be a 128 tooth or if it is a 48 pitch it would be a 92 tooth spur.