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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: 98655" data-attributes="member: 597"><p>Your friends Comet..........I used a pair of 45 lb springs with 25 mm cut off each spring and an original Armstrong damper which was very soft in its action. I also tried a Thornton shocker which worked very well, but as it is mine and they are now becoming unavailable, I am not prepared to part with it. The simplest test I can tell all of you to try on your bikes with this mod............Ride it down a slight down hill section with the engine off, (not running) get up to some speed, say 30 plus KPH and hit the brakes and see how the front behaves. With a soft shock absorber, if the springs are too weak, the front will bottom quite easily. If you have weak springs and a strong acting shock absorber the front end will feel quite rigid, most likely not bottom .............This is not the springs but the shocker absorbing the forward load, this is not correct, and the front end will feel too stiff. The reason it is good to do this test with the engine not running is you can more easily hear and feel what is going on without any clatter from the engine.</p></blockquote><p></p>
[QUOTE="greg brillus, post: 98655, member: 597"] Your friends Comet..........I used a pair of 45 lb springs with 25 mm cut off each spring and an original Armstrong damper which was very soft in its action. I also tried a Thornton shocker which worked very well, but as it is mine and they are now becoming unavailable, I am not prepared to part with it. The simplest test I can tell all of you to try on your bikes with this mod............Ride it down a slight down hill section with the engine off, (not running) get up to some speed, say 30 plus KPH and hit the brakes and see how the front behaves. With a soft shock absorber, if the springs are too weak, the front will bottom quite easily. If you have weak springs and a strong acting shock absorber the front end will feel quite rigid, most likely not bottom .............This is not the springs but the shocker absorbing the forward load, this is not correct, and the front end will feel too stiff. The reason it is good to do this test with the engine not running is you can more easily hear and feel what is going on without any clatter from the engine. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Modified Steering Stem
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