Thread: Royal Purple?
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Old 14-02-2022, 09:39 AM   #7
Mr Gazza
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Join Date: May 2013
Location: Norwich
Bike: M900sie
Posts: 5,828
Well Ryan, in the technical department of Morris Oils picked up his mail this morning and promptly replied to me.

He confirmed that the EP80w90 does indeed contain Sulphur as part of the extreme pressure additives and kindly recommended that I don't use that in my gearbox.

He put me onto Golden film AG90 which will be safe.

I'm impressed with Ryan and Morris Oils for a prompt and sensible answer.. Well done.

So there's a tip for you to pass onto your classic riding mates Roger. Drain any EP gear oil out of your gearbox immediately and replace with AG90 or non EP oil. I've heard that a lot of folk are using ATF (automatic transmission fluid) in gearboxes with success, probably better than dissolving the bushes?
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