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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: 79703" data-attributes="member: 597"><p>Chris, I have actually just installed a set up on a Shadow that has brand new spring box cases on it. I noticed that the new cases when assembled with say a pair of the 36 lb springs from Norman, that the cases are about 10mm longer end to end than original cases. I chopped the springs down by about 25 mm each and even when installed the front end was basically topped out. Now shortening these springs by say 25 mm will automatically up the spring rate to near 40 lb's. My suggestion to you is try shortening the springs by somewhere between 25 and even 50 mm each, then use packers to return the bike to the correct static height we have talked about and try it again. If the springs were say 50 mm shorter the spring rate would be about 45 lb's each and this would make a big difference as far as the bike near bottoming under heavy braking. Or else just replace one spring with an original and give that a try. I change the spring on the left side, as this is easy using the tommy bar as a windlass, you can get a result quite quickly. The ride quality will not change by much, but the ability for the suspension to not bottom out is very important. I can apply my front brakes very hard and the suspension still follows the bumps in the road surface. Cheers...........Greg.</p></blockquote><p></p>
[QUOTE="greg brillus, post: 79703, member: 597"] Chris, I have actually just installed a set up on a Shadow that has brand new spring box cases on it. I noticed that the new cases when assembled with say a pair of the 36 lb springs from Norman, that the cases are about 10mm longer end to end than original cases. I chopped the springs down by about 25 mm each and even when installed the front end was basically topped out. Now shortening these springs by say 25 mm will automatically up the spring rate to near 40 lb's. My suggestion to you is try shortening the springs by somewhere between 25 and even 50 mm each, then use packers to return the bike to the correct static height we have talked about and try it again. If the springs were say 50 mm shorter the spring rate would be about 45 lb's each and this would make a big difference as far as the bike near bottoming under heavy braking. Or else just replace one spring with an original and give that a try. I change the spring on the left side, as this is easy using the tommy bar as a windlass, you can get a result quite quickly. The ride quality will not change by much, but the ability for the suspension to not bottom out is very important. I can apply my front brakes very hard and the suspension still follows the bumps in the road surface. Cheers...........Greg. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Modified Steering Stem
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