Maintenance & Technical > KX250 / KX125
2004 KX 125 Rebuild
DP3601:
Has anyone put the SSS forks off of a YZ onto the front of your bike? These are always said to be some of the best forks. Just curious what I can find for information on this or what anyone has done out there.....
SuperWes:
I also have a 2004 kx125. Enjoyed reading your posts and I've also been reading
http://www.vitalmx.com/forums/Moto-Related,20/2005-KX125-Build,1295539?page=2 posts on Vitalmx. I'm currently slightly modifying mine. It already has a FMF exhaust with the stock muffler when I bought it, which I'll most likely keep on it. I'm installing a Boyesen Rad Reed cage and rejetting it. It had V-Force valves (first version) and has 12T front and 51T rear sprockets.
Next upgrades: replace chain (w/ RK GB520MXU) and sprockets (don't know if I'll go with 12 or 13 tooth front), sliders and chain guide (w/ TM Designworks kit), and install Fasst rear brake return spring and brake clevis.
I don't do much track riding anymore, mostly woods riding, and this has been a fun lightweight bike to ride. This bike makes my last bike, a '98 KX250, feel like a tractor.
Next year, I'll plan on having my suspension re-done, probably by Pro-Circuit.
DP3601:
--- Quote from: SuperWes on December 26, 2016, 11:37:40 AM ---I also have a 2004 kx125. Enjoyed reading your posts and I've also been reading
http://www.vitalmx.com/forums/Moto-Related,20/2005-KX125-Build,1295539?page=2 posts on Vitalmx. I'm currently slightly modifying mine. It already has a FMF exhaust with the stock muffler when I bought it, which I'll most likely keep on it. I'm installing a Boyesen Rad Reed cage and rejetting it. It had V-Force valves (first version) and has 12T front and 51T rear sprockets.
Next upgrades: replace chain (w/ RK GB520MXU) and sprockets (don't know if I'll go with 12 or 13 tooth front), sliders and chain guide (w/ TM Designworks kit), and install Fasst rear brake return spring and brake clevis.
I don't do much track riding anymore, mostly woods riding, and this has been a fun lightweight bike to ride. This bike makes my last bike, a '98 KX250, feel like a tractor.
Next year, I'll plan on having my suspension re-done, probably by Pro-Circuit.
--- End quote ---
Its been a fun bike to work on. I have plans for it now that we are in the new year. I am looking at a new set of wheels, powdercoating the frame and getting some carbon fiber from lightspeed.
I have found that I like the gearing stock but if I ride anything tight I do throw on a one tooth bigger sprocket to pull me around. I am not your typical 150 pound 125 rider!
You cant go wrong with suspension from pro circuit but for less money I have been VERY impressed with Enzo. It is some of the best suspension I have ever used. It helps they have a local place I can drop it off and not have to ship.
SuperWes:
I found out last month that my KX125 that I purchased as an '04 is actually an '03. It really bugs me when I purchase an ATV or dirtbike when there is no title or records available. I still enjoy riding it more than the old '98 KX250 I had. One way to distinguish between the '03 and the later models is that there's an extra hole in the swingarm in the later models where the suspension linkage hooks up. I'm still keeping an eye out for an '04 or '05 and this '03 that I have would make a nice spare bike and for friends to use.
DP3601:
Wanted to see if anyone has an answer on this one. The hose that comes off the side of the cylinder where the valves are is starting to pour out black oil. I opened this up and it is full of oil. Any ideas what would be causing this?
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