KX Riders

Maintenance & Technical => KX250 / KX125 => Topic started by: 81cr450 on September 12, 2013, 06:53:47 AM

Title: swingarm fitment
Post by: 81cr450 on September 12, 2013, 06:53:47 AM

Can I put the swingarm off of a 99 250 on a 1993 kx250. I'll use all the rear brakes & wheel off the 99. Appreciate any input

Title: Re: swingarm fitment
Post by: KevinTwoStk on September 13, 2013, 10:11:01 AM

I would check the PivotWorks website to see if the swingarm bearing kit is the same for the '93 and '99 KX 250 models. If so, then the swingarm should bolt between the engine and the frame without issue.

I would also check to see if the Pivotworks linkage kit is the same for those two bikes. Even if it's the same, the length of the two dogbone links between the swingarm and the shock-mount link (L-shaped, runs between the frame, shock, and dogbones) might be different and throw off the head angle one way or another.

Title: Re: swingarm fitment
Post by: k2000x on September 13, 2013, 10:29:07 AM

with some mods you can 93 swingarm pin is 15mm the 99 is 17mm

Title: Re: swingarm fitment
Post by: sandblaster on September 13, 2013, 10:38:39 AM

(http://www.oem-cycle.com/forum/download/file.php?id=1232)

(http://i644.photobucket.com/albums/uu165/oemcycle/KX250%20KAWASAKI%201999%20KX%20250%2099/SWINGARMPIVOTPIN.jpg)

don't think the swing arm pivot pin will be a problem.
I am concerned about the geometry but I have never tried it..

Title: Re: swingarm fitment
Post by: 81cr450 on September 13, 2013, 01:09:33 PM

Thanks guys. Have a line on a bike but needed to know if what I "need" will work. If it dont work I guess I could sell it on ebay  :roll:

Leverage ratio should be an easy figure right? It'd work like the adjustable links , kinda.

Title: Re: swingarm fitment
Post by: motopunk on September 14, 2013, 12:56:03 AM

Quote from: k2000x on September 13, 2013, 10:29:07 AM

with some mods you can 93 swingarm pin is 15mm the 99 is 17mm

the 17mm swingarm pivot-bolt came in 93! 

there is another problem ...there are still the brackets, that hold the linkage!
  in 94 came the newer frame without these brackets and since 94 is the engine smaller and came the bigger and longer bearings...
so you can not use the 99 swingarm in the 93... but u could use a 93 swingarm in a 99 with the right bushings between swingarm and the smaller engine cases...
 its the same thing like putting a  k5-engine in a 94 and newer 250-frame. you need the older swingarm or a real good welder ...  :wink: