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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
1951 Black Shadow Restoration
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<blockquote data-quote="greg brillus" data-source="post: 132898" data-attributes="member: 597"><p>Referring to Vic's comments about the lubrication of the output shaft bushes.......Some have drilled a small hole through the side of the shaft somewhere where the double gear slides, though this is not easy on a very hard shaft.......I generally cut a scroll into the larger G16 bush to assist "Feeding in" some oil......This can cause an oil leak as the smaller outer bush has no seal.......Sometimes I would push this bush inward a bit more and use a small "O" ring in the groove held by the small cup washer that holds the kickstart ratchet into mesh. The available end float of the input shaft will let some oil migrate in to the bushes as well.......It is quite important to check this end float before the G 2 cover door is installed, usually push the door fully home and hold in with a couple of cover screws, then pull the shaft in/out to see what you have.........A good 0.5 mm is plenty........The plunger springs are too strong........I generally squeeze them in the vice until they are coil bound, this will shorten them by about 2 mm, and this makes the shift much better........Polishing around the outer of the camplate and taking a bit off the point of the plunger helps a little. I have struck shifting issues where the bevel gear pressed into the camplate was not fully home (due to a small bur) probably as it broached it's way in.......If you spun the camplate on the G 34 spindle, it would wobble like a swash plate.......this causing a tight spot on one of the selector forks as it rotates.......As always, lots of things to check</p></blockquote><p></p>
[QUOTE="greg brillus, post: 132898, member: 597"] Referring to Vic's comments about the lubrication of the output shaft bushes.......Some have drilled a small hole through the side of the shaft somewhere where the double gear slides, though this is not easy on a very hard shaft.......I generally cut a scroll into the larger G16 bush to assist "Feeding in" some oil......This can cause an oil leak as the smaller outer bush has no seal.......Sometimes I would push this bush inward a bit more and use a small "O" ring in the groove held by the small cup washer that holds the kickstart ratchet into mesh. The available end float of the input shaft will let some oil migrate in to the bushes as well.......It is quite important to check this end float before the G 2 cover door is installed, usually push the door fully home and hold in with a couple of cover screws, then pull the shaft in/out to see what you have.........A good 0.5 mm is plenty........The plunger springs are too strong........I generally squeeze them in the vice until they are coil bound, this will shorten them by about 2 mm, and this makes the shift much better........Polishing around the outer of the camplate and taking a bit off the point of the plunger helps a little. I have struck shifting issues where the bevel gear pressed into the camplate was not fully home (due to a small bur) probably as it broached it's way in.......If you spun the camplate on the G 34 spindle, it would wobble like a swash plate.......this causing a tight spot on one of the selector forks as it rotates.......As always, lots of things to check [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
1951 Black Shadow Restoration
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