Just noticed - during a cam-valve play adjustment- that the area behind the cover from the engine case "CDI" side to get to the cranckshaft "turning" bolt was full with engine oil....
I wonder if this is caused by a leaking crankshaft seal or maybe due to a too high oil level.
In the work procedures I do not see the task to drain the oil before removing this cover. Cover picture is attached below or see link :
(btw, this is not a picture of my bike, but one I found on google / this forum)
Oil came out the lower cover plate when I removed it.
The lower cover also has an o-ring. I therefore assume that a bit of oil behind is, is normal and expected...In fact there is a direct connnection to the distirbution chain "room" and therefore some oil will always enter this part of the case???
But in my situation, a rather large amount was in it... ca.. > 100 ml i guess..- not sure, it was.before I closed the cover again...and drained the oil in the normal way.
So, my questions are:
- - Is it normal that this amount of oil is behind it (Wat should the oil level be)
- - Could it be the crankshaft seal (leaking)?
- - In case the crankshaft seal has caused it, how severe is this? Safety Risk of engine jamming? So, must I replace it?
Replacing the Crank Shaft seal would mean almost compleet disassembly of the engine....
Thanks for sharing your experience!! or advise....