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FJR Motorcycle Forums
Technical & Mechanical Problems
Intermittent Shifting Problem
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<blockquote data-quote="wfooshee" data-source="post: 740313" data-attributes="member: 6354"><p>But without applying some clutch, or moving the bike by walking it, if the dogs aren't lined up with holes in the gear hub, they will remain not lined up, the desired gear won't be selected, and the star cam will send you back to the previous gear (the gear you're "stuck" in) under its spring pressure. A stopped-in-gear bike <em>has</em> no load on the dogs other than what the open clutch applies by oil and friction drag. Both shafts are locked to the rear wheel by the fact that it's in gear. If the dogs are pointed at steel instead of holes, something on those shafts has to turn, just a little bit, and if it's stopped in gear that can't happen.</p><p></p><p>Yes, the bike passes through neutral every time you shift, but that doesn't turn the gear hub. Slipping the clutch with just a touch of friction zone while trying to shift will get the dogs turning during the shift, but it has to be light enough not to lock the gear you're trying to come out of. That may have been RadioHowie's fix. And it won't take much, just a few degrees on the shaft, to move the gear hub far enough to engage, and it'll probably be a rather clunky shift.</p><p></p><p>As for clutchless shifting, that applies to any non-synchro sequential transmission, but I'm not brave enough to force the shifter while loaded. Maybe it's going to go, maybe it'll bend my forks. But with unloaded throttle (not closed throttle!) shifts are smooth as glass and lightening fast.</p></blockquote><p></p>
[QUOTE="wfooshee, post: 740313, member: 6354"] But without applying some clutch, or moving the bike by walking it, if the dogs aren't lined up with holes in the gear hub, they will remain not lined up, the desired gear won't be selected, and the star cam will send you back to the previous gear (the gear you're "stuck" in) under its spring pressure. A stopped-in-gear bike [I]has[/I] no load on the dogs other than what the open clutch applies by oil and friction drag. Both shafts are locked to the rear wheel by the fact that it's in gear. If the dogs are pointed at steel instead of holes, something on those shafts has to turn, just a little bit, and if it's stopped in gear that can't happen. Yes, the bike passes through neutral every time you shift, but that doesn't turn the gear hub. Slipping the clutch with just a touch of friction zone while trying to shift will get the dogs turning during the shift, but it has to be light enough not to lock the gear you're trying to come out of. That may have been RadioHowie's fix. And it won't take much, just a few degrees on the shaft, to move the gear hub far enough to engage, and it'll probably be a rather clunky shift. As for clutchless shifting, that applies to any non-synchro sequential transmission, but I'm not brave enough to force the shifter while loaded. Maybe it's going to go, maybe it'll bend my forks. But with unloaded throttle (not closed throttle!) shifts are smooth as glass and lightening fast. [/QUOTE]
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FJR Motorcycle Forums
Technical & Mechanical Problems
Intermittent Shifting Problem
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