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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Modified Steering Stem
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<blockquote data-quote="davidd" data-source="post: 78019" data-attributes="member: 1177"><p>Just to supply some reference, Paul Thede in his book Motorcycle Suspension Bible, states: "Our testing shows that the ideal sag is about 1/4 to 1/3 of the suspension's total travel." John Bradley in his book "The Racing Motorcycle" states, 25% (Paul Thede mentions 25% as the racing set up and 33% as the street set up.)</p><p></p><p>Laney Thornton suggested 50% in his first manual on his suspension, but later changed it to 30% in later printings. </p><p></p><p>I believe the logic behind these numbers is a concern that the fork should not "top off" during use. There seems to be a fear that if the fork tops off during riding that the front wheel will loose its ability to absorb bumps and that would lead to serious traction problems. Very small bikes (125cc and under can be set up with less sag, mostly because they are so light that the rider provides most of the sag.</p><p></p><p>David</p></blockquote><p></p>
[QUOTE="davidd, post: 78019, member: 1177"] Just to supply some reference, Paul Thede in his book Motorcycle Suspension Bible, states: "Our testing shows that the ideal sag is about 1/4 to 1/3 of the suspension's total travel." John Bradley in his book "The Racing Motorcycle" states, 25% (Paul Thede mentions 25% as the racing set up and 33% as the street set up.) Laney Thornton suggested 50% in his first manual on his suspension, but later changed it to 30% in later printings. I believe the logic behind these numbers is a concern that the fork should not "top off" during use. There seems to be a fear that if the fork tops off during riding that the front wheel will loose its ability to absorb bumps and that would lead to serious traction problems. Very small bikes (125cc and under can be set up with less sag, mostly because they are so light that the rider provides most of the sag. David [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Modified Steering Stem
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