I am now the owner of PO55 OTS; and very happy with this lovely bike - apart from the mystery of the disappearing oil! There is no evidence of oil leaking, it does not smoke but at the end of every ride ( usually about 50 miles of gentle, Cornish lanes) I have to add at least 100ml of oil just to get the level visible in the sight glass. After the last ride out, it took 300 ml, which is starting to get a bit concerning. Any ideas as to where the oil is going and how to stop it would be greatly appreciated.
possible stem seals if it was piston rings you would see slight smoke have you changed the oil recently if not makes sure when you do put the specified oil not too thin like 5 w 40 put 10w 40 its mot using too much as tho its old oil too thin try it
Yep, I have changed oil and filter recently, and always use the recommended 10w 40 oil! As this bike has done very few miles since it's 350 conversion, I would be surprised if it was the valve stems; but always a possibility - I was hoping not to have to go groping around inside the engine!
