Hitchcocks Forum

I'm still trying to sort my oil flow problems in my 1951 350 bullet.
There might be an issue with the oilways.

You can see on the right hand side of the timing cover (feed pump) two oilway holes but, looking at the crankcase, there is only one corresponding opening.

Is this crutial?

The problems I've been having so far have been with the scavange side where I installed a new pump body.

Have you got a 350 bullet engine with a circa 1950 model G timing cover. Sure there was a difference re the number of holes.

May be talking rubbish of course..

I don't think you are talking rubbish, Gwilly, the right hand opening goes to the oil pump surface but the opening in the pump body, only one in the feed side, does not meet up with the opening, if that makes sense. Meaning that the extra oilway comes and goes from nowhere to nowhere which shouldn't have an adverse effect on lubrication.
I've put it all back together and am getting oil out of the rocker feed union which means the scavenge pump is pulling oil out of the crankcase which means oil is getting into the crankcase from the feed pump. Simples - I hope!

The extra hole isn't just an access hole for a drilling operation during manufacture is it? Just a thought.

I just did the timing on my 1947 model G 350 and it has the 3 holes. The way i understand it is that oil is also pumped to the base of the cylinder barrel (about 10-15mm from the bottom at the rear. I recently had my barrel resleaved and they didnt drill the hole in the barrel so im pretty sure my oil is pumped into a dead end too. Im not 100% on this. I also would like clarification on this, does it matter if oil doesn't get pumped directly to the barrel? I dont think modern bikes have this feature.... or do they?

I should think the barrel oilway is not really needed, they stopped doing it sometime in the early 50s anyway. Modern oils and pistons and rings should be able to cope and you won't use so much oil!

REgards, Mark

I was hoping that was the case