Slipping Clutch after oil change.

Statystyk1 · Jul 27, 2014

Hi I just changed the oil yesterday from Silkolene Comp 4 15W50 to Rock Oil Sigma 15W50 and my clutch is slipping when hard on throttle and then it bites and it makes the ride dangerous.Note I felt the clutch slip on the Comp 4 but it wasnt as bad as with the new oil.The bike was in garage for 6 years after I bought it Iv changed almost everything including new fork seals last week.But now another problem comes up I will bleed the slave cylinder today and check if it has any air in it (slave cylinder is aftermarket) and report back.

blinkey501 · Jul 27, 2014

What year is your bike?
I see you have posted in the RSVR section but is your bike an early mille?
The earlier bikes used semi synthetic oil up to a certain year and the later engines fully synthetic oil.
Putting fully synthetic oil in an earlier engine sounds just like the problems you are having, the clutches don't like it.
If this is what I think it is drain the oil and change to semi. Problem sorted

Statystyk1 · Jul 27, 2014

Its a gen 2 Mille R and It has a semi synthetic oil now Rock oil Sigma is semi synth. Thats why its weird for me.

blinkey501 · Jul 27, 2014

Statystyk said:
Its a gen 2 Mille R and It has a semi synthetic oil now Rock oil Sigma is semi synth. Thats why its weird for me.

Mmmm. If all you have done is change the oil then that's all it can be in my mind.
All oils have to meet certain specifications so maybe fully synthetic is required?
Seems a bit strange.

Statystyk1 · Jul 27, 2014

I bleed the clutch and the same thing happens I think its time to change the clutch.

Statystyk1 · Jul 28, 2014

Should i try the m6 washer mod before changing the clutch and springs ?

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