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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Wheels
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<blockquote data-quote="A_HRD" data-source="post: 45999" data-attributes="member: 49"><p>Kurt,</p><p></p><p>David is right on both counts. </p><p></p><p>But first jack-up the engine near the front (or use your 2 propstands as a front engine centre-stand by removing the 5/16 BSF bolt on the left side of the front engine plate). </p><p></p><p>Having got the wheel clear of the ground, simply rotate it and check visually for up-and-down or side-to-side run-out at the rim. If there is nothing more than about 15-20 thou, its unlikely to be that causing the severe sensation you describe. </p><p></p><p>Now look at the rim and establish whether there is a tyre-clamp fitted. There will likely be one of them 4 spokes away from the schraeder valve and two protruding bolts to hold wheel-weights further around the rim. Originally the 2 bolts held lead weights of variable size to balance-out the effect of the clamp and valve. This is likely to be the area of your problem. A simple static balance of the wheel (best with the brake-plates removed) is all you need to do. </p><p></p><p>If this is all OK, I would then turn my attention to the front hydraulic damper which is simple to remove. If it is a std Vincent one - it likely has no oil left in it!! And the seals are probably shot. It might be worth sending off to exchange for a refurbished one.... or you could try to do the work yourself. There is a mod out there for improving the sealing arrangement..... </p><p></p><p>Hope this helps.</p><p></p><p>Peter B</p><p>Bristol, UK.</p></blockquote><p></p>
[QUOTE="A_HRD, post: 45999, member: 49"] Kurt, David is right on both counts. But first jack-up the engine near the front (or use your 2 propstands as a front engine centre-stand by removing the 5/16 BSF bolt on the left side of the front engine plate). Having got the wheel clear of the ground, simply rotate it and check visually for up-and-down or side-to-side run-out at the rim. If there is nothing more than about 15-20 thou, its unlikely to be that causing the severe sensation you describe. Now look at the rim and establish whether there is a tyre-clamp fitted. There will likely be one of them 4 spokes away from the schraeder valve and two protruding bolts to hold wheel-weights further around the rim. Originally the 2 bolts held lead weights of variable size to balance-out the effect of the clamp and valve. This is likely to be the area of your problem. A simple static balance of the wheel (best with the brake-plates removed) is all you need to do. If this is all OK, I would then turn my attention to the front hydraulic damper which is simple to remove. If it is a std Vincent one - it likely has no oil left in it!! And the seals are probably shot. It might be worth sending off to exchange for a refurbished one.... or you could try to do the work yourself. There is a mod out there for improving the sealing arrangement..... Hope this helps. Peter B Bristol, UK. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Wheels
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