Maintenance & Technical > KX250 / KX125
2004 KX 125 Rebuild
DP3601:
I recently took on the project of rebuilding a 2004 KX 125. I have completed everything except the motor. I am in need of some help or suggestions as to a problem:
It runs great at low to mid rpm's. When you really get the rpm's up in the higher range there is what feels like a serious vibration coming from the motor. First thought was loose motor mounts. But nothing was loose. I also pulled the top end to look at the crank as well as the both engine covers to see if I could feel any play in the bearings. Any ideas what this might be?
Any help would be appreciated.
Foxx4Beaver:
did you actually measure the play in the big end bearing on the crank?...it could be past it's service limit.
does the magneto/flywheel look ok?
DP3601:
--- Quote from: Foxx4Beaver on January 15, 2016, 01:02:25 AM ---did you actually measure the play in the big end bearing on the crank?...it could be past it's service limit.
does the magneto/flywheel look ok?
--- End quote ---
The flywheel looks brand new, in really good shape. I did not measure the play. How would you go about measuring the play. Im kind of a rookie at this...
Foxx4Beaver:
with feeler gauges...I couldn't tell you what the service limit is on an '04, the manual I have doesn't go that high...but in the one I have, the service limit is .70mm for side clearance...and .10mm for radial clearance....but that's for a 1990.
you can either call your local Kawie dealer for the specs, or wait a little while, and someone on here might be able to tell you.
wondering if it could possibly be clutch related too...unfortunately, you may end up having to completely break it down to find the culprit...but see if anyone else has some advice before going too far yet.
DP3601:
--- Quote from: Foxx4Beaver on January 15, 2016, 01:24:29 AM ---with feeler gauges...I couldn't tell you what the service limit is on an '04, the manual I have doesn't go that high...but in the one I have, the service limit is .70mm for side clearance...and .10mm for radial clearance....but that's for a 1990.
you can either call your local Kawie dealer for the specs, or wait a little while, and someone on here might be able to tell you.
wondering if it could possibly be clutch related too...unfortunately, you may end up having to completely break it down to find the culprit...but see if anyone else has some advice before going too far yet.
--- End quote ---
Thanks for the information, it is very much appreciated.
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