Hi I have been thinking about going the bike engine route. I have however noticed that a lot of builders split there drive shaft so a reveres box can be fitted. My question is if you do not fit a reverse box is it of to use a single drive shaft or is it best to split it with some bearings and a connector in the middle.

You'll definitely need a two-piece driveshaft with a centre bearing, the distance between the bike output shaft and the diff on a conventional Locost is far too big to allow the use of a single piece driveshaft unless it was about 8" diameter!

Chris

how come you dont need a two piece draive shaft on a conventional engined car as the book sugests. is it just a mater of the hi rpms

Nope, if you have the same diff, the RPM of the driveshaft isnt any different in a BEC compared to any other engine, but if you think about it, in a normal car install, you have a nice long gearbox that stretches half way down the tunnel, so the propshaft only goes from the end of this to the diff. On a BEC, you don't have this gearbox in the middle as its all integrated into the engine casing, so the prop has to reach from the engine bay right the way back to the diff, about twice as far.

Chris

ok thanks for the info