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Slipping Clutch CB750 DOHC

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AndyS

Slipping Clutch CB750 DOHC

Hi I have a CB750C 1981, the clutch was slipping when I was in second gear at around 4000 revs. It was find in all other gears and generally worked great apart from the slip in second. I have just replaced the clutch fiction plates and springs only to find the problem is still there - still in second gear but at 5000 revs and it only slips when pulling away hard ish. If I pull away nice and gentle it does not slip but anything other than gentle it slips. The engine oil is Motul 4T 5100 10w40 and is rated MA2 which is good for a wet clutch. The oil is semi synthetic. Any help would be good.

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Re: Slipping Clutch CB750 DOHC

Administrator

Is it clutch slip, or jumping in, and out of gear?
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1976 CB 750-A X 2
1977 CB 750-A X 4
1977 CB 750-K
1976 CB 750 F
1981 CB 750
1966 Kawasaki SG 250
1981 KZ 750 LTD
1973 CB 350
1979 CM 185 Twinstar
1982 Honda XL 80
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AndyS

Re: Slipping Clutch CB750 DOHC

Thanks for the quick reply. The bike does not jump out of gear it just slips. If I am nice and gentle all is ok but if I try to accelerate normally it slips. As the clutch is new including the springs and the adjustment is good, the only other thing is oil - I am using Motul 4T 5100 which is rated at MA2 and is suitable for wet clutch. I am now stuck.

TOOLS1

Re: Slipping Clutch CB750 DOHC

Administrator

Usually if a clutch is slipping, it slips in all the gears, and is most notable in the higher gears.
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AndyS

Re: Slipping Clutch CB750 DOHC

Just slips in second - pulls nice in first and then has a stumble in second. Other gears are also fine. Hope this is not a big problem!