can too much engine oil cause clutch slip?

[T ALP]

To answer the question - No. Much more likely to be something else - stretched cable, clutch needs adjusting, too much play at lever etc etc. Not really convinced about the oil argument. I use Synta semi-syth 10W/40 - a decent VW car oil - with no issues. I don't buy the argument that bike oil is fundamentally different, but each to his own...

But the oil that causes a problem for wet clutches has the friction inhibitors in it.

I had a rotax 500 engine one time with a bad clutch slip I changed the oil to a diesel and it improved right away I just put it down to the detergent content cleaning the plates. ------ Chris

[Cabby]

The slip you describe sounds exactly like mine a short while before the clutch finally went.

It would have lasted a while longer if we hadn't been off roading in Dent at the national.

Price it for a clutch fairly soon.........'course, I could be wrong....

[StumpyFingers]

But the oil that causes a problem for wet clutches has the friction inhibitors in it.

I had a rotax 500 engine one time with a bad clutch slip I changed the oil to a diesel and it improved right away I just put it down to the detergent content cleaning the plates. ------ Chris

The Army used to use Oil Mineral Detergent in its Rotax engines, with no detrimental effects.
As for clutch slip with too much oil, that is something I have not heard of, however I have heard of clutches being near the end of their life slipping either the plates or the springs, also if they are incorrectly adjusted.
While pulling the lever in and letting it back out watch the end by the engine to see if it moves smoothly.

[MCsanandreas]

i did find the reciept for the oil change and it looks like semi-synth car oil has been used.
that could be the prob,am also going to check adjustment to see if that makes a difference.