Author Topic: Oil Return C15  (Read 212 times)

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Oil Return C15
« on: 17 September, 2021, 07:30:20 »

I've a 1965 C15.

I rebuilt it last year and got it running this year after having it tucked away for a bit. I fitted a remote oil filter at this point too. When I first got it running, the timing was a bit off and I needed to replace the piston rings and the exhaust valve. It ran ok and the oil return and everything was okay.

After taking the top end off to hone the cylinder, replace the rings and replace the exhaust valve, I've since put it back together and there's no oil returning to the tank. I'm pretty sure it's getting to the top end as it's visible at the little cover on the side of the rocker cover. I am a little concerned and haven't ridden the bike because of this.

Does anyone know what the issue might be, please?
1965 BSA C15
1970 BSA B25 (US spec.)
2004 Aprilia Tuono