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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Timing Gear Set Up
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<blockquote data-quote="Steve Morris" data-source="post: 133678" data-attributes="member: 3648"><p>OK, the plot thickens....</p><p></p><p>Last night i thought 'enough's enough', and retired for a cogitate.</p><p></p><p>On waking this morning i could maybe see things a little clearer and was thinking that the spindle is only about 0.001" off being a really tight cold fit and probably sufficient. So off i went to the garage for a review of yesterdays work and to take stock once again. I did notice on the end of the Cam spindle that is inserted there looked like what were wear marks, but on much closer inspection the were not...</p><p></p><p>I managed to 'scratch' a bit of what looked like the wear mark off, and then the sudden realisation set in the this was not a wear mark but a 'raised' marking, yes, it was the residue of what was probably loctite or some sort of glue.. A quick 'linnish' in the lathe using 1200 paper confirmed my fears, it was loctite, someones been here before...</p><p></p><p>So, cleaned off i inserted the cam spindle into the casing and it now wiggles around like the proverbial c*ck in a shirt sleeve......</p><p></p><p>So, Looking at a couple of other posts i have decided i need to replace the cam spindle and the exhaust follower spindle which is loose but not as much, with oversized replacements. Worse case scenario is i have to remove the engine and split the cases, best case scenario is i can get the whole engine up to a decent temp using a small space heater about 4ft away then using a hot air gun 'locally' heat the spindle area to try to obtain about 150 degrees or above after doing a dry run with the original spindles and the steady plate to get my reference markings etc, and leaving the spindles in the freezer overnight, i have a fair to slim chance. I know i will need to be fairly quick as the casing will cool down quite quickly as will the spindle heat up, but I'm sure that with a couple of practice runs and someone else to ride shotgun with me, i could be done.</p><p></p><p>Whilst I have everyones ear, I have measured the cam and exhaust cam follower spindles i have, which i have to assume are standard, and they measures 0.501" and 0.374" respectively. Can anyone please confirm is these are correct as standard?</p><p></p><p>Can anyone else confirm they have managed this repair also?</p><p></p><p>Looking at the worst case scenario, it wouldn't be the end of the world, as it is using a bit of oil and i suspect either guides/valve seals or rings sticking where the bike has been sat for years, plus there are a few minor oil leaks which i could do all in one hit, and i have the time at the moment...</p><p></p><p>Ill keep you all posted!</p></blockquote><p></p>
[QUOTE="Steve Morris, post: 133678, member: 3648"] OK, the plot thickens.... Last night i thought 'enough's enough', and retired for a cogitate. On waking this morning i could maybe see things a little clearer and was thinking that the spindle is only about 0.001" off being a really tight cold fit and probably sufficient. So off i went to the garage for a review of yesterdays work and to take stock once again. I did notice on the end of the Cam spindle that is inserted there looked like what were wear marks, but on much closer inspection the were not... I managed to 'scratch' a bit of what looked like the wear mark off, and then the sudden realisation set in the this was not a wear mark but a 'raised' marking, yes, it was the residue of what was probably loctite or some sort of glue.. A quick 'linnish' in the lathe using 1200 paper confirmed my fears, it was loctite, someones been here before... So, cleaned off i inserted the cam spindle into the casing and it now wiggles around like the proverbial c*ck in a shirt sleeve...... So, Looking at a couple of other posts i have decided i need to replace the cam spindle and the exhaust follower spindle which is loose but not as much, with oversized replacements. Worse case scenario is i have to remove the engine and split the cases, best case scenario is i can get the whole engine up to a decent temp using a small space heater about 4ft away then using a hot air gun 'locally' heat the spindle area to try to obtain about 150 degrees or above after doing a dry run with the original spindles and the steady plate to get my reference markings etc, and leaving the spindles in the freezer overnight, i have a fair to slim chance. I know i will need to be fairly quick as the casing will cool down quite quickly as will the spindle heat up, but I'm sure that with a couple of practice runs and someone else to ride shotgun with me, i could be done. Whilst I have everyones ear, I have measured the cam and exhaust cam follower spindles i have, which i have to assume are standard, and they measures 0.501" and 0.374" respectively. Can anyone please confirm is these are correct as standard? Can anyone else confirm they have managed this repair also? Looking at the worst case scenario, it wouldn't be the end of the world, as it is using a bit of oil and i suspect either guides/valve seals or rings sticking where the bike has been sat for years, plus there are a few minor oil leaks which i could do all in one hit, and i have the time at the moment... Ill keep you all posted! [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Timing Gear Set Up
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