Maintenance & Technical > KX500 Aluminum Frame Conversion (AFC)

How well do you like your KX250F/K5 conversion

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sandblaster:
Since I had to cut some of the length off the new frame rails I used the scrap piece to test fit the new rails.
To make it fit smooth and clean I filed two of the four corners from the test piece so that it would fit the radius of the frame guide:



Once I filed a small bit from the two corners I was able slip the test piece in easily.

sandblaster:
Once I tuned up both frame rail guides I set the frame straight up to look at how well the new frame rails would fit.
Then I noticed that the frame rail guides are actually pigeon toed inward.



I took a look at the original carriage and sure enough the frame rails were bent to compensate for this.



It's hard to see but if you look close you will see the original rails are bent out.
Since the replacement rails are straight, they will not make full contact all the way back.
However, this is not a problem as there is plenty of weld surface.

sandblaster:
So, you remember this guy?



Well after a visit with Mr, Sawzall and the grinder, it looks like this:



sandblaster:
This gives you a really nice purchase point for the frame rails:

jholt:
Looking good Now get to welding so you can get this baby together.  I got to ride mine this weekend and what a blast you will be like a kid in a candy store when you get her together. I spent half the day at the track talking about it and the other half riding....  These thing really draw some attention and if they dont in the pits once you hit the track everyone starts going what is that thing cause it don't sound like a 250


all I can say it was fun building but once complete its twice as much fun..

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