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transmission jams up

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1984 Yamaha xt250, shifts through the years fine but more so than not it jams in fifth gear and I am not able to downshift , after much messing around by playing with the foot shifter and rocking the bike back and fourth it will allow me to down shift to first and then back to fifth fine untill it's time to down shift then it hangs up again. Any ideas ?

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Call dealer to confirm those will fit in your 84 bike. But that should be it. Tear down before ordering to confirm bent. Nice price!!!

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If the forks are worn as opposed to bent, they will be very obvious. The fingers/ears that engage the gear should show a light shiny spot where they touch, but heavily ground/galled and sloppy in the part of the gear where they ride will be really obvious. Usually, just one gets slightly bent then wears itself out bearing against the gear all the time.  

 

The one other  thing that can contribute to this is possible binding of any part of the shift linkage/shaft/etc.  Check that first.

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