Maintenance & Technical > KX500 Steel Frame Conversion (SFC)
my 03 kx 250/500 build
doorslammer:
hey guys
well as things go i bought a mates 2003 kx250. A little backstory, he bought it blown up, had the suspension serviced and resprung, and rebuilt it. it go 3 laps into a race and called it quits, they put it down to a crank they didnt replace, a new set of cases and crank and it was time for round two. the second tank in and i was following and it locked up hard, it got real sketchy watching it lock up through a whoop sectionwhile trying to find an exit :-o
anyway he was fed up with it and wanted it gone, considering it had all the suspension serviced and set-up for my weight i took it looking for another project :-D
anyways heres the carnage of the motor, not much worht keeping
and here is where it sits now after a quick clean, should be picking up a 95 500 motor late next week if im lucky
any input, tips or ideas, im open.
cheers Toby
The Flyin Hawaiian:
Glad to see more 03/04 KX250 conversions.
doorslammer:
thanks flyin, you post gave a heap of useful info.
anyways i picked this up tonight.
has a little weld on the clutch cover, bore measures 86mm.
still trying to work out what pipe to use. everyone seems to be happy using a cr5 pipe with the kx section welded onto it. why isnt anyone just modifying a kx pipe.
unfortunatly i couldnt get a pipe with the motor, so i havent got a front section to weld onto a cr pipe (unless a 250 pipe will work, i doubt it but i havent checked yet)
so has anyone used a kx500 pipe? did it take much to modify?
Marco810:
Nice looking build you got going, that 250 sure went out with a bang
I believe the K5 pipe is too high, you wouldnt be able to fit it through the frame under the shock reservoir. Ive seen pipes with the lower section of a kx5 pipe and upper section of a cr5 however. And just so you know a 250 pipe wont work with a 500, different stinger size ect
don46:
I used a KX pipe and modded it on my first two hybrids, then started using CR pipes, performance was about the same and ease of install was much easier. JFAB modded a stock desert pipe for an aluminum framed bike, there is a post here at KXriders about it, didn't look to bad
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