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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
What oil to put in the gearbox?
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<blockquote data-quote="Simon Dinsdale" data-source="post: 1081" data-attributes="member: 58"><p>If you are going to use EP90 gear oil use the GL4 specification and not the GL5. Virtually all EP90 sold is to GL5 spec and are based on sulphur and/or zinc and it is this which attacks the bronze bushes.</p><p></p><p>My other interest is a Triumph GT6 which use EP90 to GL4 in the diff and gearbox with bronze bushes as recomended by the factory, owners club and well known gearbox builders who all say avoid GL5. It is this info which was concluded in the Velocette discussion forum as well.</p><p></p><p>Unfortunately GL4 spec is not as easy to get hold of.</p><p></p><p>Regards,</p><p>Simon.</p></blockquote><p></p>
[QUOTE="Simon Dinsdale, post: 1081, member: 58"] If you are going to use EP90 gear oil use the GL4 specification and not the GL5. Virtually all EP90 sold is to GL5 spec and are based on sulphur and/or zinc and it is this which attacks the bronze bushes. My other interest is a Triumph GT6 which use EP90 to GL4 in the diff and gearbox with bronze bushes as recomended by the factory, owners club and well known gearbox builders who all say avoid GL5. It is this info which was concluded in the Velocette discussion forum as well. Unfortunately GL4 spec is not as easy to get hold of. Regards, Simon. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
What oil to put in the gearbox?
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