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FJR Motorcycle Forums
Technical & Mechanical Problems
Driveshaft Effect
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<blockquote data-quote="garyahouse" data-source="post: 977352" data-attributes="member: 20946"><p>If it were driveshaft effect or torque steer, then you'd notice more of a pronounced difference under acceleration than you did on steady cruise or decel. However, that would NOT explain why I've never experienced this on my FJR...</p><p></p><p>Torque steer was a result of early front drive vehicles with dissimilar length front axles. Not a factor on the FJR.</p><p></p><p>Driveshaft effect typically causes the rear end to jack up under accel, and visa versa under decel. Mama Yamma did a great job with the FJR's design. This is not much of a factor on the FJR, and dead sure wouldn't cause what you're describing.</p><p></p><p>Check your tire pressures. 41-42 front? Check your front tire wear. More wear on the left? I know that sounds strange, but I've seen this a couple times... that the front tire has a more pronounced flat area on the left side. Why? Who knows. But I've seen it. That would cause the bike to pull left ever so slightly. I assume that with the front wheel in the air, the steering head turns freely. I assume there have been no accidents causing twisted or bent forks??</p><p></p><p>Gary</p><p></p><p>darksider #44</p></blockquote><p></p>
[QUOTE="garyahouse, post: 977352, member: 20946"] If it were driveshaft effect or torque steer, then you'd notice more of a pronounced difference under acceleration than you did on steady cruise or decel. However, that would NOT explain why I've never experienced this on my FJR... Torque steer was a result of early front drive vehicles with dissimilar length front axles. Not a factor on the FJR. Driveshaft effect typically causes the rear end to jack up under accel, and visa versa under decel. Mama Yamma did a great job with the FJR's design. This is not much of a factor on the FJR, and dead sure wouldn't cause what you're describing. Check your tire pressures. 41-42 front? Check your front tire wear. More wear on the left? I know that sounds strange, but I've seen this a couple times... that the front tire has a more pronounced flat area on the left side. Why? Who knows. But I've seen it. That would cause the bike to pull left ever so slightly. I assume that with the front wheel in the air, the steering head turns freely. I assume there have been no accidents causing twisted or bent forks?? Gary darksider #44 [/QUOTE]
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FJR Motorcycle Forums
Technical & Mechanical Problems
Driveshaft Effect
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