Question about 2001 Yamaha SR 125

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Gear selection problem

Since a slight slow speed fall, while my wife is learning, the gears do not work well. Intermitently we cannot select 2nd gear and sometimes not at all, even from stationary. I have had side case off and find spring, selector fork seems to do the job but the circular selector thing with the lobes on seems to just hold at top of lobe, and or at the neutral lobe. Can flick it round with screwdriver. Took clutch plates out but could not get basket off without I think a special tool, and found that the gear lever operation could select 2nd but again sometimes would stick. Reassemebled and played with clutch lever tension but that did not sem to make much difference. Gear selection 3-5th and return 5-1 no problem. Dealer said check spring and selector arm fork aligns, and it appears to do so. There is slight float across the engine as the gear arm shaft passes left to right but that has no effect either loose or pushed. There were no bits in bottom of engine as I drained oil out and checked with a magnet. I need help as to problem and if as i think i do get it to a decent mech.

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  • grsimp Sep 28, 2009

    Now fixed. Simple. The gear lever was bent up allthough you couldnt tell. Two people looked at bike on Sunday and noticed gear selector did not move through the arc properly. took lever off and moved it down two splines. Job done.

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  • 58 Answers

The shifting fork shaft, that the shifter actually connects to is probably bent. it might be impossible to see the bend with the human eye, but just a slight bend will make it makfunction. replace it.

Posted on Oct 15, 2009

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