Friction Modifier contaminated clutch plates.

[gregr]

I made a huge mistake and put Schaefer's semi-synthetic 7000 race oil in my GS1150E. It caused severe clutch slippage. So I drained it out, ran cheap oil through it to fulsh it out and replaced the fiber plates with new stock plates. That fixed the slippage.

My question is, is there a way to decontaminate the clutch discs? They are well withinspecsas to thickness. Or, should I just throw them away?

[Nessism]

I'm surprised you had problems. Have you ever changed the clutch springs? I'm not sure about cleaning the plates but I'd soak them in cleaning solvent (like paint thinner) and give them another try (with new springs).

[gregr]

I'm surprised you had problems. Have you ever changed the clutch springs? I'm not sure about cleaning the plates but I'd soak them in cleaning solvent (like paint thinner) and give them another try (with new springs).

I put new Barnett HD (Green) springs in with the new plates. I'm going to try your suggestion and soak them in solvent and then re-soak them in oil before putting away as spares. If needed in one of the other 1100's or 1150's I will try them along with HD springs.

Thanks,
Greg

[Mysuzyq]

Same thing happened when I used Amsoil 0W-40 synth.....it would slip a bit at high revs. No modifiers listed in that oil as well. As Ness said, the culprit was 27 year old springs getting tired. Changed the springs, scuffed up the driven (steel) plates, and put the same drive plates back in (original 1982 items!) and no hint of a slip now, though I switched to Castrol Grand Prix conventional m'cycle oil (only a bit more money than regular GTX). I'd leave it alone if all is well now, but if it begins slipping even with the new plates, spend $10 on new OEM springs and ride happy.....keep the Schaeffer clutch plates for spares, as they should work fine (the 7000 bike oil has no modifiers in it).

[Nessism]

Over on the Bob is the Oil Guy forum there are several people using Energy Conserving oils in their motorcycles without problems. As long as the clutch springs are good you are usually okay.

[TheCafeKid]

I put EC oil in my now EX GK once......



ONCE.....



Started slipping instantly. Drained and replaced, and cleaned the plates with emery board and resoaked...Helped, but it was never the same.. BTW, it had brand new springs.