Slipping/worn clutch help

[Howie]

Weren't the "good ol'" oils SG?

AFIAK, SH is fine, but SG certainly is the safest auto oil for a wet clutch, can't go wrong with a JASO MA rating.    At least through '06 Ducati still recommended SE, SF or SG, so they agree with you, Norm.  I have seen I doubt you will find SE or SF on a store shelf anywhere.  Ummm...I'm going to modify my advice after looking at a Mobil 1 4T.  The bottle says both SG and SH.  Maybe SH oils need extra additives to qualify for SG also, not sure.  IMO, the bottle should say SG or MA for a wet clutch.

I usually use moto specific oil because the few $ more over 2-3K miles is, to me, cheap insurance.  Before the SJ and newer standards took place Mobil 1 car oil was fine with me.

[Norm]

Check out tractor oils. I'm told that they are exempt from all the regs and have all the old formulas.

[Howie]

Check out tractor oils. I'm told that they are exempt from all the regs and have all the old formulas.

Diesel also, a reason for the popularity of Shell Rotella.  Phosphorus has been reduced to improve catalytic converter life.  I'm not sure why zinc was reduced, maybe the same reason.

[LA]

Oil smoil. If you could measure the stack height, you would probably find that it is way short - your clutch plates are warn to the point that it slips now.

Oils can affect operation for sure, but at 12,500 mi. you're probably up for a new set of clutch plates.

LA

[MrFryMoto]

i had the same exact issue on my '03 620 - only that it wasn't due to a different oil change

in the end, it turned out to be clutch springs - the plates were fine

...just a thought, and another area to check (but if you are going that far, might as well replace the plates too)

[Langanobob]

in the end, it turned out to be clutch springs - the plates were fine

What springs did you use for replacements? 

Thanks.

[MrFryMoto]

What springs did you use for replacements? 

Thanks.

i ended up using a Barnett plate/spring setup for a while - but it always had shifting issues. So in the end i swapped my stock plates back, and used the barnett springs

worked like a champ

[Howie]

50K miles on my original wet clutch, no slipping yet (Knocking on wood).  A buddy has a bout 70K on his original wet clutch.  Another buddy put about 36 K on his dry clutch monster before it started slipping, what a racket it was making though.

[Langanobob]

So in the end i swapped my stock plates back, and used the barnett springs

Thanks, if I run into trouble down the road this info will save me some duplication of effort.

[prudolph]

Thanks for the info guys, unfortunately Im back at school for a few weeks so it might be a while before I get a chance to take a look at it. Like in all the trouble shooting I do im gonna go for the cheapest easiest fix first. Generally that fixes it. Ill post up after I change out the oil.

[prudolph]

Hey all,
So I finally made it home from school(few days before finals ... ) and changed out the oil.  It seems to working perfect again. Thanks for all the info.