Have you noticed any clutch slippage using automotive oil's?

 

This was the only time I have encountered any clutch problems. Pick Here
When that happenned, I was running the Yamaha 10w-50 lube, by the next weekend I had switched to Maxima. No probs after that.

 

yamalube 10/50 or 20/40, no problems whatsoever

 

Thank's gary660R. What oil have you liked the best so far?

 

Have 70 hours on bike and have been using straight Valoline 20-50 for the last 50. did have slippage before I changed from Yamaha oil. I also use a A/C Delco filter #2057.

 

If I had my druthers and had easy access (<---key words)to the 15w-50 Maxima, I would run it exclusively. Another catch with the Maxima oil is it runs about $10 a quart. I could ride reasonably hard for a period, step off, and hold my hand on the cylinder head with this stuff. Probably a tad of overkill though (is that really possible???)...actually, they advertise that it's overkill.

 

yamalube 20/40.

 

My bike is number 59x (can't quite remember). I have been using AMSOIL 10W40 synthetic motorcycle oil (no anti-friction modifiers). No problems of any kind with about 85 hours of use.

 

Correct me if I'm wrong (I'm not a Raptor owner), but I thought that the transmission failures were due to some sort of manufacturing problem/mistake in the early production runs involving reverse and second gear? Why would running a different oil have any bearing on that? Shouldn't it be solely because of the use and harsh engagement of reverse and/or second?

I believe there was a large discussion here when the Raptors were first released regarding the serial numbers... I forget what the number was that the second production run started on (which was the run that fixed the tranny problem), but I'm pretty sure that there was a definite point; many people before it had experienced problems, but no one afterwards had encountered any such difficulties.

 

Bel-Ray semi-syn. 20-50 summer,10-40 winter. Have used it in my Rotax for years and my engine builder said, whatever your doing, keep it up. No problems with the Raptor.