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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Replace Rear "76 Koni" Damper on Series B (2501)? Advise please
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<blockquote data-quote="greg brillus" data-source="post: 132377" data-attributes="member: 597"><p>Its all about available travel........The Vincent does not have much front or rear.......If you have a small amount of travel then the way to control it is with strong springs, or else it will readily bottom........I choose the strongest of the range of springs in the front end, as using the weaker springs bottom too easily........remember the 45 lb springs are way softer than the stock Vincent springs. To use a strong/stiff shock absorber is the wrong way to fix the problem as you are using the shock absorber to "Mask" the spring strength.......If you read up on bike suspension from the guru's they all say that you should use as strong a spring that will do the job with minimal pre load as is possible and a shocker unit that will control the spring oscillations without limiting the behavior of the springs.........I have ridden Comets that have had the modified front end done, using the AVO damper up front, the fork action was way too rigid, with no suppleness at all........The back end is no different, you have to increase the suspension travel there to get a softer ride, this generally means the rear chain looks like it will fall off with the bike unladen.......Of course the fully sprung rear seat is the real answer there. There are limits to what can be done, folk who really struggle with it have mostly given up on old bikes and ride their electric start BMW's now........well that's what I've seen here locally anyway.</p></blockquote><p></p>
[QUOTE="greg brillus, post: 132377, member: 597"] Its all about available travel........The Vincent does not have much front or rear.......If you have a small amount of travel then the way to control it is with strong springs, or else it will readily bottom........I choose the strongest of the range of springs in the front end, as using the weaker springs bottom too easily........remember the 45 lb springs are way softer than the stock Vincent springs. To use a strong/stiff shock absorber is the wrong way to fix the problem as you are using the shock absorber to "Mask" the spring strength.......If you read up on bike suspension from the guru's they all say that you should use as strong a spring that will do the job with minimal pre load as is possible and a shocker unit that will control the spring oscillations without limiting the behavior of the springs.........I have ridden Comets that have had the modified front end done, using the AVO damper up front, the fork action was way too rigid, with no suppleness at all........The back end is no different, you have to increase the suspension travel there to get a softer ride, this generally means the rear chain looks like it will fall off with the bike unladen.......Of course the fully sprung rear seat is the real answer there. There are limits to what can be done, folk who really struggle with it have mostly given up on old bikes and ride their electric start BMW's now........well that's what I've seen here locally anyway. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Replace Rear "76 Koni" Damper on Series B (2501)? Advise please
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