Hello everyone,
I have a problem where I do not know what to do:
The oil flow (return) on my bike is riddled with air bubbles. I never noticed this before, Iin my opinion this was not the case in the past. Since my oil lines are interrupted with a piece of clear plastic tubing which I have now replaced after a long time, you can now see the air bubbles in the return. Also, the oil pressure (I think) is not very high, if I take out the check valve in the camshaft cover and run it, I can easily hold the opening with my thumb.
So my question is, is this "normal" like this or do I have a problem with the oil pump? Of course I don't want to break anything, but I also don't dare to drive anymore....
I would be very grateful for any help.
Completely normal bubbles in scavenge line.
All British bikes have a larger capacity scavenge compared to the feed side.
Designed to keep the crankcase clear of oil.
If left for a few days, there will be a solid flow which will then become oil and air bubbles
Hi Rhyatt,
thanks for the quick answer. then I will go for a small ride this evening :)
If it doesn't have air bubbles in it when its running, then you're in trouble. Bubbles coming back in the return oil into the oil tank confirms oil is circulating.
Hi again, after riding the bike for about one hour it still is running, no strange noise from the engin or anything strange, so I think everything is ok. After changing from Magneto ignition to a Thorspark kit it runs much more stabel and doesn´t die when stoping at a red light. Even starts right away when hot.