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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Burman Box Again
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<blockquote data-quote="brian gains" data-source="post: 114449" data-attributes="member: 3153"><p>I have end float in the main shaft so 3rd 24T must be free to revolve freely. However on the last rebuild the gear cam shaft did not have the 0.002" end float and did not revolve so I fitted a 0.030" for this reason where as when I had stripped down initiallt there was no inner case gasket at all.</p><p></p><p>However it should be noted that inner cam steel bush had worn considerably and the PO had shimmed out with hardened? washers and no doubt also omitted the gasket to take up end play. This all being negated by the newly machined inner steel bush, it is worth remarking that there is notable hydraulic damping when the gear cam shaft is pushed into the steel bush and this has to be compressed to bleed out trapped air.</p><p></p><p>Reading around the issue and taking advice here I shall check the plain plates for flatness, all measure at approx' 0.06" thickness. The fibre plates are all approx 0.17" thick and I shall check for flatness, scrub up on coarse sandpaper and clean with petrol or acetone. If this doesn't cure the issue I see a big spend and m/c off the road for foreseeable future 8-(</p></blockquote><p></p>
[QUOTE="brian gains, post: 114449, member: 3153"] I have end float in the main shaft so 3rd 24T must be free to revolve freely. However on the last rebuild the gear cam shaft did not have the 0.002" end float and did not revolve so I fitted a 0.030" for this reason where as when I had stripped down initiallt there was no inner case gasket at all. However it should be noted that inner cam steel bush had worn considerably and the PO had shimmed out with hardened? washers and no doubt also omitted the gasket to take up end play. This all being negated by the newly machined inner steel bush, it is worth remarking that there is notable hydraulic damping when the gear cam shaft is pushed into the steel bush and this has to be compressed to bleed out trapped air. Reading around the issue and taking advice here I shall check the plain plates for flatness, all measure at approx' 0.06" thickness. The fibre plates are all approx 0.17" thick and I shall check for flatness, scrub up on coarse sandpaper and clean with petrol or acetone. If this doesn't cure the issue I see a big spend and m/c off the road for foreseeable future 8-( [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Burman Box Again
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