1976 yamaha yz 125 not shifting properly.not staying in gear

SOURCE: '95 Yamaha YZ 125 clutch - stays in gear when clutch is pulled in

hey dude,, just thought id come in and give u some tips or 3,, i take it when u pull clutch lever in, and try and change gear it feels like your foot will snap b4 it goes in gear,, if that makes sense,, firstly mate,is to make sure the clutch cable slides freely ,easest way is to take cable off and just grab 1 end and make sure it isnt sticky,, if so dip one end of the cable in a bit of old oil ,,whilst holdin the other end ,pull and push the cable inner, this will **** up a bit of lubricant inside the cable ,, keep doin this each end till free to move, ,,next step if the cables ok,,, and may need help if u dont no,drain the oil out,,and as u r sat on the bike is to remove the clutch casing on the right hand side of the moter,where the bottom end of the cable goes,remove the casing being carefull not damage the gasket,,then u will see clutch plates and friction plates housed,, undo the 7 or 8 spring loaded bolts carefully take the first fibre plate out then metal friction plate then another fibre plate and so on,, wen u take the 1st plate out place that on the bench ,stacking each plate on top of one another, cause they have to go back in as they came out,,wen out,,u need a piece of wet n dry paper ,or fine emery,,and just wipe round both sides of the fibre plates taking the shine off them,as u put them back in,, put casing back on with a decent gasket,, oil back in cable on, make sure cable has no free play on the lever so wen u r about to pull lever in it bite straight away,, start her up, warm it up and try it,,any probs still il eat my shoe,, take care m8

SOURCE: 03 YZ 250 won't shift into 3rd

You have a bent shift fork. The repair means removing the engine from the frame then tearing it down into about 75 parts which will then allow the bent shift fork to be replaced. This is not a job for the amature mechanic. Wish I were there with you to guide the repair.

SOURCE: How much shuld I ask for???

Without bent forks the bike would sell for about $1500. With the shop charge of $900 to fix the forks and a buyers hesitation to purchase a bike with problems, it will probably sell for $500 as a fair price.

I don't get paid for my answers but I do take pride in them, and I am only trying to help. So if you will, > > A “very helpful” rating for this answer? Thanks!

SOURCE: Yamaha Raptor Shifting

Hi there,

Well, it seems like there is a problem with the shift return spring; it's on the backend of the gear, Seems broken or not attached properly, so first of all do this check.

Good Luck!!
Thanks

SOURCE: how do i decode yamaha yz 125 engin id number

You don't decode it. It is only a production run series number. Mororcycles are like cars in that respect. It is the frame number, AKA the "VIN number", is what carries all the information. Call a dealer with the frame number and he can tell you year, paint color, specific model and more. They may have a problem if the bike is too old. Yamaha changed to a newer code system a few years back.
Can I get a “very helpful” rating on this answer?