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leisure67 Started a new thread 1981 Yamaha YZ125 frame

11/12/2014 9:29am
Hey everyone, Can any one tell me if a 1982 YZ125 frame is the same as a 1981? I would like to replace the frame on my '81 because it has some pretty good battle scars at the rear. See a lot of '82's for sale but not many '81's. Appreciate any help. Todd
This forum thread has 24 replies.

leisure67 Started a new thread 1983 YZ125 power valve

5/17/2013 3:22am
Hey everyone, Recently bought an '83 YZ125 that had no top end power. Found that the power valve was not functioning & badly worn in several places. Anyone know where I could find one? Need the valve & the linkage but the governor is fine. Appreciate any help.
This forum thread has 13 replies.

leisure67 Added a reply to 1983 YZ125 power valve

5/17/2013 3:22am
I did order all the new parts listed above & should get most if it delivered on Saturday. They still haven't gotten the BOSS, COLLAR so I dont know when I will get that. I'll give Beach Yamaha a call & see if they have that part. Thanks for the help!!

leisure67 Added a reply to 1983 YZ125 power valve

5/12/2013 1:14am
Need a set of foot pegs & a kick starter. Pretty complete other than that. Need a seat for the '81 too if you happen to have one... or parts of one? Give me a call. Thanks!

leisure67 Added a reply to 1983 YZ125 power valve

5/9/2013 3:40am
Ordered the new parts. Will see how tight the linkage is with the new parts. Thanks for the help guys. Yamaha Motor - 5X4-1131A-00-00 VALVE 1 $117.66 1 On Order Scheduled to Ship Friday MAY 10, 2013(due from manufacturer) Ship Method FEDXGR Yamaha Motor - 5X5-11937-00-00 BOSS,COLLAR $7.53 1 On Order Scheduled to Ship Friday MAY 10, 2013(due from manufacturer)...

leisure67 Added a reply to 1983 YZ125 power valve

5/8/2013 4:53am
Looks like the reason for the linkage being loose where it attaches to the power valve is because it is missing a piece part. Part # 26 (boss,collar) is MIA which would explain why it wore out.

leisure67 Added a reply to 1983 YZ125 power valve

5/8/2013 3:42am
I have found them thru Yamaha but didnt want to spend that much on it. A big reason I was thinking about a used one is because I will also need the linkage that goes to the governor. The spot where it attaches to the power valve is worn badly. Appreciate the tip on the dots... I did not know...

leisure67 Added a reply to 1981 Yamaha YZ125 frame

3/10/2013 3:23am
I have replaced everything in the steering tube, except the obsolete inside out backwards seal, with new Yamaha parts. Thought maybe i would get lucky & the the old obsolete seal wouldnt leak if I cleaned everything up really good... I was wrong. It still leaks a little. I am going to prove the fact that I have very little...

leisure67 Added a reply to 1981 Yamaha YZ125 frame

3/8/2013 6:52am
There are 3 places that the upper back has been welded back onto the frame. Looks like it was broken off or at least partially broken off? The loop(?) that is under the seat is bent up pretty bad as well. Dont have any pictures here now but can get some. Never heard of Marks Motorcycle Swapmeet. Will check it...