Maintenance & Technical > KX500 Steel Frame Conversion (SFC)

kx250f frame

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91kawifive00:

--- Quote from: The  Flyin Hawaiian on October 20, 2011, 11:14:35 AM ---I agree that the 99-02 would be a little easier. Plus there seem to be more rollers or donor bikes available from those years. There also seems to be alot more info out there for that conversion. Not much was out there for the 03/04. I was lucky in that my 04 250 donor was my race bike since new and I traded my brother inlaw my DR350/435 dualsport for his blown up 500. I sold off most of the parts from the 500 and the conversion probably only cost me about $500 or so. I also have so many parts in stock that it cut the cost down considerably. For the 03/04 the headstay on the head itself has to be cut down and the frame mount should be centered with it. Actually not much more work than the 99/02 chassis. The 05/07 KX250 frame changed quite abit, its narrower (I have a 07 KX250) and may be a tighter fit. I think it would still work though.

--- End quote ---

awesome. thank you for the information. im gonna start lookin for 99-02 frame. maybe ill get lucky and find a cheap roller but ill most likely end up just getting a frame off ebay and building it up. im very curious as to what parts i can use off my 500 to save a little money?

jonny500:
http://www.kxriders.com/forums/index.php/topic,8032.90.html
take a look at this page of my thread junk man made a post saying he used the forks swingarm and wheels. he used a 97 500, remember the forks change in size about 94 what year is your 500. shame your not in the u.k i have alot of left overs from my build

91kawifive00:

--- Quote from: jonny500 on October 21, 2011, 04:56:48 AM ---http://www.kxriders.com/forums/index.php/topic,8032.90.html
take a look at this page of my thread junk man made a post saying he used the forks swingarm and wheels. he used a 97 500, remember the forks change in size about 94 what year is your 500. shame your not in the u.k i have alot of left overs from my build

--- End quote ---

his bike looks great. i have a 91 kx500 i would be using for this build. yea im all the way in new jersey. i doubt there is anyone in my area from the forum. sucks

91kawifive00:
im really freakin excited about this build. im sure im gonna need a little guidence along the way but hey thats how you learn right. soo correct me if im rong, so far im understand that im gonna have to

- drill the rear mount to 17mm
- cut spacers to (45.2mm)
- swing arm narrowed about 8mm on each side (39.7mm)
- head stay removed, and fab a new one to front of motor
- cut and move front mount, bottom fits fine as is
- modify cr500 pipe to clear water pump. weld kx flange on cr pipe?
- mod tank or use shorty plug

anything else im forgetting or any type of comments before i try and tackle this would be greatly appriciated guy's. once again thanks fellaz

91kawifive00:
and being that my bike is a 91 will the whole tripple tree assembly and suspension fit the 99-02 frame? the linkege and rear shock? or would i have to find a set from that year?

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