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FJR Motorcycle Forums
FJR Parts & Accessories Discussions
Gen III Non-ES fork upgrade?
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<blockquote data-quote="Fred W" data-source="post: 1271273" data-attributes="member: 3828"><p>One thing that is not clear in the FSM spring specs is whether the K1 stage is "as installed" or on the raw uncompressed spring.</p><p></p><p>One big difference between the 1st Gen 2 stage spring and the 3rd Gen 2 stage spring is the length of the 1st stage is significantly shorter on the 3rd Gen, so it may be that the pre-load and bike weight (sag) takes up nearly all of the softer spring. If that were the case they would feel much more like the higher spring rate all of the time.</p><p></p><p>But there is good reason to be dubious of the FSM specs. For instance, on the 3rd Gen ES they claim to have two single rate springs with 2.0 kg/mm rates. That is ludicrous. Perhaps they meant the sum of the two is 2.0 kg/mm, which would be much more believable, but why change from the normal method of spring rate spec now? <img src="https://www.fjrforum.com/forum//public/style_emoticons/default/unsure.png" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>PS - I went back and fixed my Gen 2 typo. Thanks for the heads up, not that it really mattered much.</p></blockquote><p></p>
[QUOTE="Fred W, post: 1271273, member: 3828"] One thing that is not clear in the FSM spring specs is whether the K1 stage is "as installed" or on the raw uncompressed spring. One big difference between the 1st Gen 2 stage spring and the 3rd Gen 2 stage spring is the length of the 1st stage is significantly shorter on the 3rd Gen, so it may be that the pre-load and bike weight (sag) takes up nearly all of the softer spring. If that were the case they would feel much more like the higher spring rate all of the time. But there is good reason to be dubious of the FSM specs. For instance, on the 3rd Gen ES they claim to have two single rate springs with 2.0 kg/mm rates. That is ludicrous. Perhaps they meant the sum of the two is 2.0 kg/mm, which would be much more believable, but why change from the normal method of spring rate spec now? [IMG]https://www.fjrforum.com/forum//public/style_emoticons/default/unsure.png[/IMG] PS - I went back and fixed my Gen 2 typo. Thanks for the heads up, not that it really mattered much. [/QUOTE]
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FJR Parts & Accessories Discussions
Gen III Non-ES fork upgrade?
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