Stupid question re crankshaft...

rzgkane · Post by **rzgkane** » Sat Feb 25, 2012 12:24 am

Ok, so I took apart a 305 engine today and have a question. What is the purpose of the second set of toothed gears on the crank right next to the timing chain sprocket?

CliffC · Post by **CliffC** » Sat Feb 25, 2012 1:52 am

By chance did you buy any books to show and tell how to take bike apart and/or put together. Silvers books are very good and cover just about everything you will run into. In answer to this question, it drives the oil pump. Cliff

rustywrench · Post by **rustywrench** » Sat Feb 25, 2012 1:52 am

One drives the oil pump and the other drives the timing chain. Rusty

rzgkane · Post by **rzgkane** » Sat Feb 25, 2012 2:11 pm

rustywrench wrote:One drives the oil pump and the other drives the timing chain. Rusty

Ahh, yes. Stupid me. This was a salvage motor and the oil pump was missing. I mistook the oil filter chain for the oil pump chain. Thanks for the reply.