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FJR Motorcycle Forums
Technical & Mechanical Problems
Fork Oil
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<blockquote data-quote="Fred W" data-source="post: 1067508" data-attributes="member: 3828"><p>Don't put 7 wt oil in a stock fork. You will not be happy.</p><p></p><p>Traxxion recommends a heavier weight oil only because they open up the orifices as a part of their re-valving package (to improve high speed damping). With the stock fork orifices putting heavier oil in will just make the fork a brick.</p><p></p><p>And I reject the non-sense that the stock oil thins quickly. It is thin when it is new (intentionally) and doesn't thin from there all that much. Some of the stuff that comes out of the suspension tuners (second hand) is laughable.</p><p></p><p>Cheap(est) fork upgrade is to just replace the wimpy stock fork springs with something more suitable for the bike (and your) weight. Service the fork and replace the oil with something close to the stock watery Yamaha 01 oil. A spring with about a .95 - 1.1 kg.mm rate should be good depending on your own heft and how much (or how many) you intend to carry regularly.</p></blockquote><p></p>
[QUOTE="Fred W, post: 1067508, member: 3828"] Don't put 7 wt oil in a stock fork. You will not be happy. Traxxion recommends a heavier weight oil only because they open up the orifices as a part of their re-valving package (to improve high speed damping). With the stock fork orifices putting heavier oil in will just make the fork a brick. And I reject the non-sense that the stock oil thins quickly. It is thin when it is new (intentionally) and doesn't thin from there all that much. Some of the stuff that comes out of the suspension tuners (second hand) is laughable. Cheap(est) fork upgrade is to just replace the wimpy stock fork springs with something more suitable for the bike (and your) weight. Service the fork and replace the oil with something close to the stock watery Yamaha 01 oil. A spring with about a .95 - 1.1 kg.mm rate should be good depending on your own heft and how much (or how many) you intend to carry regularly. [/QUOTE]
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FJR Motorcycle Forums
Technical & Mechanical Problems
Fork Oil
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