Posts
19
Joined
8/14/2019
Location
Monroe, NC
US
Edited Date/Time
12/5/2020 8:09pm
I am currently tearing down a new to me yz125 and noticed a few things that look off on first glance.
1. The first thing I noticed was that the subframe rails were spread out further than I expected at the top mounting location (photo 1). The previous owner had "solved" this by simply adding 3-4 washers to take up the slack but I want to address the actual issue.
It seems as if the subframe is bent but if I remove the washers and tighten down the upper bolt so that the subframe rails straighten out, it bends the support bracket between them.
Can anyone post up some photos of their subframes where they mount at the top of the frame for comparison?
2. The exhaust side plastics seem to be rubbing the exhaust due to their angle but from review, they seem to be in the correct location and the exhaust may be misaligned. I went over the exhaust hanger and it looks to be correct and unbent. The bike has the Polisport restyle kit currently and there does seem to be a small cutout in the airbox plastic to allow clearance but its still not nearly enough in the currently install.
From the couple photos I have seen of other bikes with the restyle kit, the exhaust should not contact the plastics nor airbox at all.
Has anyone seen these specific issues and if so, what was the solution? Thanks in advance.
1. The first thing I noticed was that the subframe rails were spread out further than I expected at the top mounting location (photo 1). The previous owner had "solved" this by simply adding 3-4 washers to take up the slack but I want to address the actual issue.
It seems as if the subframe is bent but if I remove the washers and tighten down the upper bolt so that the subframe rails straighten out, it bends the support bracket between them.
Can anyone post up some photos of their subframes where they mount at the top of the frame for comparison?
2. The exhaust side plastics seem to be rubbing the exhaust due to their angle but from review, they seem to be in the correct location and the exhaust may be misaligned. I went over the exhaust hanger and it looks to be correct and unbent. The bike has the Polisport restyle kit currently and there does seem to be a small cutout in the airbox plastic to allow clearance but its still not nearly enough in the currently install.
From the couple photos I have seen of other bikes with the restyle kit, the exhaust should not contact the plastics nor airbox at all.
Has anyone seen these specific issues and if so, what was the solution? Thanks in advance.
Anyone familiar with the differences in the '02-'04 and '05+ subframes?
The Shop
Being a poor man and, poor people have poor ways, I'd just place a Stainless washer on the right side that is slightly thicker than the recess that's been created by the subframe wear to the main frame and closes the left side gap then pull the subframe over and bolt it up. Then you might try laying it on the right side and giving a few good foot presses around the left side seat bolt area and see if the silencer lines up a little better.
The damage is done to the frame and even with a new subframe it's still not going to want to bolt up correctly without a shim on the right side frame mount anyway.
With the polisport restyle kit it will rub your exhaust. You need to cut a little more away.
Its not perfect but I at least understand why its like that now. I will pick up a solid washer of the correct size to replace the stack of washer currently used and just ride it like it is as dishing out $700-$800 for a new frame and subframe is not worth it at this point.
Post a reply to: Possibly bent subframe on yz125