CLUTCH PROBLEM

[bmwalfaone]

Hello,
I am a newbie to this forum. I have a 1989 NT650 with 11,000 miles. I have owned it for a few years and about 5,000 miles. Just yesterday the clutch started slipping under full throttle above 6,000rpm. Interestingly it only happenned in 3rd gear. I am using Castrol GTX 10W40. Fresh oil change. I have a new set of Barnett plates. Should I just install them? How about the springs?
Thanks for your help!

[Doc]

Only in third? and no other gear over 6000? Huh? odd.


If you have the Barnett you might as well throw it in there, and while your at it get a couple heavy duty springs to put in there as well.. oh and a shift kit.

[Stevenjhow]

And make sure you don't use regular motor oil....I was told that regular motor oil saturates the clutch discs. Maybe it's just a sales pitch to buy "motorcycle" motor oil, but that is what I have been told. Definitely get different springs, it makes a big difference

[TJStoner]

i think the reg motor oil issue is the additive "moly" in the oil....causes some issues with slippage...not a prob on dry clutches of course , hence the reason ducati uses moly in the oil they use....

[DefTrap]

I use ordinary car 10w40 mineral oil in mine. No issues.

[LeftRightLeftThrottle]

http://motorcycleinfo.calsci.com/Oils1.html

I read this and believed it, now I run rotella synthetic 5w-40 but you could probably run baby oil in a honda and never break it.

[Tusk]

I would also chime in to give an oil change to something like Shell's Rotella-T. And see what happens.

However when my clutch started slipping at full throttle from 4th to 5th I knew it was time...... um, but that was at around 42K miles! I'm also the original owner. If the Previous Owner was a limp wristed clutch dragger.... It may have been abused.