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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: 79701" data-attributes="member: 597"><p>Chris, I think the short answer might well be "Yes" but it is probably not that simple. From what I have read on the internet about springs/rates it seems that the rate changes almost universally by the amount of coils you remove, and generally the first coils do not count, as the end is nearly butted up to the next coil of wire which causes this first coil to be inactive. I must say that I have been quite active in the "Cutting" of springs to get a desired result, and as David rightly discovered, it is easier to start with a short spring and simply pack it up if necessary. Though I will say that in all of the new stem installations I have done so far, all have had pre-load on the springs, even Neal's Comet had about 20 mm of pre-load on "Cut down springs" with what I would say have about 45 lb rates which gives approximately the same rates I have in my twin but my springs have about 50 mm of pre-load. Though Neal's Comet has an original Koni shock absorber which has less travel than the Thornton I have on my twin. Cheers...........Greg.</p></blockquote><p></p>
[QUOTE="greg brillus, post: 79701, member: 597"] Chris, I think the short answer might well be "Yes" but it is probably not that simple. From what I have read on the internet about springs/rates it seems that the rate changes almost universally by the amount of coils you remove, and generally the first coils do not count, as the end is nearly butted up to the next coil of wire which causes this first coil to be inactive. I must say that I have been quite active in the "Cutting" of springs to get a desired result, and as David rightly discovered, it is easier to start with a short spring and simply pack it up if necessary. Though I will say that in all of the new stem installations I have done so far, all have had pre-load on the springs, even Neal's Comet had about 20 mm of pre-load on "Cut down springs" with what I would say have about 45 lb rates which gives approximately the same rates I have in my twin but my springs have about 50 mm of pre-load. Though Neal's Comet has an original Koni shock absorber which has less travel than the Thornton I have on my twin. Cheers...........Greg. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Modified Steering Stem
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