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Tornado said:

Seems the UK brand CopaSlip would be similar to NeverSeez or just any anti seize product. I followed Mick Hemmings advice from his gearbox dvd and just left gaskets dry. No leaks. On timing cover I chickened out and used blue Hylomar dressing. I know it does not harden and find it quite good.

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Just be ultra sparing if you use blue hylomar because it falls off in shards into the oil

baz said:

Just be ultra sparing if you use blue hylomar because it falls off in shards into the oil

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I've never seen it harden to form shards....just stays goopy. Even under the tube's cap, where its been sitting on the air exposed side of the cap/metal neck for at least 3 decades now, still tacky and goopy. Could it be a different version you are referring to?

The stuff that was on the timing cover flange when I disaasembled last week, black hardened and crusty....i think maybe that Aviation Gasket Sealer stuff....that had overhangs on inside edges which crumbled off with forcing when I was scraping flange clean.

Hello htown16

Are you sure the clutch is working correctly and primary and rear chains are adjusted ok?

A worn clutch centre - very 'notchy' - and a couple of bent clutch plates caused me similar problems. But once replaced with new items the gearbox has been surprisingly good since.

Andy