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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Modified Steering Stem
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<blockquote data-quote="greg brillus" data-source="post: 108421" data-attributes="member: 597"><p>It generally uses most of the travel left in the spring cases.......I have only ever chopped about 15 to 20 mm off one machines cases, the lower halves where like a knife edge at the top and jamming on full compression. All other bikes I have left the cases untouched, although I do go to a lot of trouble to make sure they do not bind or jam when fully compressed. I have tried pretty much all springs and shocker combinations........ If you install the springs as they are, the front end will be topped out, there is too much pre-load........... So once the springs are shortened enough for this not to happen, then the front end will easily bottom out on heavy bumps and braking. If people are using the weaker springs, and are happy with the results, that's great, but I will say that it is definitely the shock absorber that is taking up a lot of the load. If you disconnect the front shock absorber and ride the bike, it will readily bottom out without much of a bump and applying the front brakes. The singles will definitely feel softer and better rider comfort than the twins on account of the extra 30 Kg's in weight...........I tried using softer springs on mine and it did feel softer, but would bottom quite easily. Perhaps if I chopped some of the cases down it might handle the softer springs, but I really don't want to do that .........I'm very happy with my bike..........It is at the rear of the bike that the bigger gain would be made to ride comfort, say a fully sprung seat, but I'm still working on that one ........Lets not forget that the main gain from this change to the front end was safety first ........The handling and braking are also significantly improved .......These are the most common comments I get from riders who I have helped out with this mod.</p></blockquote><p></p>
[QUOTE="greg brillus, post: 108421, member: 597"] It generally uses most of the travel left in the spring cases.......I have only ever chopped about 15 to 20 mm off one machines cases, the lower halves where like a knife edge at the top and jamming on full compression. All other bikes I have left the cases untouched, although I do go to a lot of trouble to make sure they do not bind or jam when fully compressed. I have tried pretty much all springs and shocker combinations........ If you install the springs as they are, the front end will be topped out, there is too much pre-load........... So once the springs are shortened enough for this not to happen, then the front end will easily bottom out on heavy bumps and braking. If people are using the weaker springs, and are happy with the results, that's great, but I will say that it is definitely the shock absorber that is taking up a lot of the load. If you disconnect the front shock absorber and ride the bike, it will readily bottom out without much of a bump and applying the front brakes. The singles will definitely feel softer and better rider comfort than the twins on account of the extra 30 Kg's in weight...........I tried using softer springs on mine and it did feel softer, but would bottom quite easily. Perhaps if I chopped some of the cases down it might handle the softer springs, but I really don't want to do that .........I'm very happy with my bike..........It is at the rear of the bike that the bigger gain would be made to ride comfort, say a fully sprung seat, but I'm still working on that one ........Lets not forget that the main gain from this change to the front end was safety first ........The handling and braking are also significantly improved .......These are the most common comments I get from riders who I have helped out with this mod. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Modified Steering Stem
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