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FJR Motorcycle Forums
Technical & Mechanical Problems
Setting sag and preload on new fork springs?
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<blockquote data-quote="sath182" data-source="post: 1324992" data-attributes="member: 29607"><p>To answer your question directly, adding spacer length increases preload. That's why RaYzerman19's insistence on getting the calculations correct is so important. Did you start by measuring the depth of the fork cap with the preload adjuster in the middle of it's range? Walk us through your calculations.</p><p></p><p>Also, Oil level affects the air pressure inside the tube. As the suspension is compressed the air acts like a spring. More oil = Less air = Stiffer spring. If you have too much oil then the system can hydro lock before you reach full travel. The after market springs probably have more submerged volume as well as being stiffer so you need more room and less assistance from the air spring.</p></blockquote><p></p>
[QUOTE="sath182, post: 1324992, member: 29607"] To answer your question directly, adding spacer length increases preload. That's why RaYzerman19's insistence on getting the calculations correct is so important. Did you start by measuring the depth of the fork cap with the preload adjuster in the middle of it's range? Walk us through your calculations. Also, Oil level affects the air pressure inside the tube. As the suspension is compressed the air acts like a spring. More oil = Less air = Stiffer spring. If you have too much oil then the system can hydro lock before you reach full travel. The after market springs probably have more submerged volume as well as being stiffer so you need more room and less assistance from the air spring. [/QUOTE]
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FJR Motorcycle Forums
Technical & Mechanical Problems
Setting sag and preload on new fork springs?
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