Maintenance & Technical > KX500 Original

89 K5 w/ 02 KX 250 front end

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doordie:
You make a sleeve to older stem and then insert it to new clamp and use a bolt and loctite to secure it.

Have done it,works well even when you jump as "Bubba"!   :-D

don46:
I did cut the down tube, and replaced it with the downtube from an old k5 frame, it came out really well but the whole job was more work than I anticipated. The kx250 chassis is much easier to retrofit a 500 motor, the 250f chassis requires modification to the airbox, the right side of the frame to allow the clutch cover to be removed, and many small mods. it was a real pain in the you know what. The 250f air boot is to restictive and small, you have to install a 250 filter system and cut part of the airbox, I fabricated a piece of aluminum to allow the 250 filter to fit. Anyway good luck, if you would like to see pictures let me know an I'll get you some

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