1991 Yamaha Timberwolf Will not go into 1st

[PvtTarget]

Will not go into 1st but if ya go past will go into maybe next gear. Will not shift into reverse. I have see others say that the shift cam assembly dowel worn or fall out. How do I get to this? Do I need to break case in half?

 

thanks for your help 

[Gwbarm]

I would first pull the side cover off and make sure the shifter cam assembly is working properly. Also check that the reverse cable is adjusted properly.

[Mech]

Yeah, check the reverse cable's good, adjusted, and has some spring tension from the lever. Check the lever moves.

[PvtTarget]

I took off the recoil side and the shift fork for forward and reverse works as it should. I am not sure which side the shifter cam is under. I see the case does split in half but there has to be an more easy way to see cam.

 

Thanks

[Mech]

If you go to Babbits spares they have pretty good exploded diagrams of all the parts, or a service manual will have much the same exploded view diagrams..

If the shifters are moving nicely but it's not engaging gear, it might be time to inspect the oil for metal chunks ?

Have you ridden the bike recently ? Did it get into low gear then ? It might have blown low gear, and that other gear you say it will go into might(presumably) be second.. ?

[Gwbarm]

Its on the clutch side just below the primary clutch. You should see it move when you push down the shift lever, check to make sure the bolt is in tight that holds it together and that all the pins are in place, and it hasnt jumped out of position.

[Mech]

If a pin has dropped out or broken(never happens) from the shift barrel, then it wouldn't go into the next gear up. The ratchet wouldn't move the barrel far enough to engage the next pin around. If the ratchet/self centering mechanism between the shift lever and the shift barrel was damaged I don't think it would move up into the second gear.

If the original description in post#1 is right, it's blown a cog..  I'd try some more tests to confirm it, and/or check the oil for metal.