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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Comet Primary Chain Case Leak
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<blockquote data-quote="Hugo Myatt" data-source="post: 16017" data-attributes="member: 99"><p>Are you sure it is a chaincase leak? Both the chain oiler and the engine breather chuck oil about in this area. Now there is a cunning recess forward of the gearbox sprocket between the inner chaincase casting and the drive side engine casting which is suitably placed to pick up any oil that happens to be flung forward. This can occur despite the cast in deflector forward of the sprocket on the back of the inner chaincase casting (Always supposing this is still there. Unfortunately this is frequently broken away due to a rear chain breakage at some time and the chain being wound up on the gearbox sprocket.). When stationary this recess will stealthily discharge its collected oil onto the ground giving every appearance of an oil leak. If you extend a digit below the chaincase and behind the inner casting and feel forward you will find this hidden recess and probably be rewarded with an oily finger.</p></blockquote><p></p>
[QUOTE="Hugo Myatt, post: 16017, member: 99"] Are you sure it is a chaincase leak? Both the chain oiler and the engine breather chuck oil about in this area. Now there is a cunning recess forward of the gearbox sprocket between the inner chaincase casting and the drive side engine casting which is suitably placed to pick up any oil that happens to be flung forward. This can occur despite the cast in deflector forward of the sprocket on the back of the inner chaincase casting (Always supposing this is still there. Unfortunately this is frequently broken away due to a rear chain breakage at some time and the chain being wound up on the gearbox sprocket.). When stationary this recess will stealthily discharge its collected oil onto the ground giving every appearance of an oil leak. If you extend a digit below the chaincase and behind the inner casting and feel forward you will find this hidden recess and probably be rewarded with an oily finger. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Comet Primary Chain Case Leak
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