BSA Owners' Club Workshop Discussions

The BSA Workshop => Singles => Topic started by: Tigerfeet on 30 Mar, 2026, 11:14

Title: pre-oiling the rockers C15
Post by: Tigerfeet on 30 Mar, 2026, 11:14
I am now at the stage of putting the fluids in. As part of this I though it would be useful to syringe some oil into the (short) copper rocker feed pipe using my 100ml syringe - before I connected the rubber section. I was surprised to find that this was seemingly impossible. It was as though there was a total blockage.

Thinking about it, the oil goes through the very narrow gap beween the rocker and the shaft - and if cold oil flowed freely through there it it wouldn't spread to all surfaces and pick up heat etc etc. So a certain amount of resistance is to be expected.  But I'm not convinced that any oil went in.

I've never tried this before - so have nothing to compare it with. Has anyone else tried this?
Title: Re: pre-oiling the rockers C15
Post by: rhyatt on 30 Mar, 2026, 11:56
All I did on my c15 was manually oil the rockers with a can before starting , then left the acorn nuts loose to let the return side oil enter the rocker pipe easily , then when the bike was ticking over and the return oil oozing from the acorn nuts banjos , nipped them up to direct the oil to the rocker spindles
Title: Re: pre-oiling the rockers C15
Post by: DAVE BRADY on 01 Apr, 2026, 20:32
Hi,

For bit of an oil boost on starting hold a finger over the return to the tank to restrict it bit.  This will push more oil to the rockers.

Dave.