Maintenance & Technical > KX500 Aluminum Frame Conversion (AFC)

2008 kx450f with '86 kx500 motor, bad idea??

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byron909:
been told by a few that this motor is not a good candidate for a aluminum frame swap. was wondering why? not worried about not having the center powervalve. other than that and the 5 spring clutch, what is so different?

was planning to start this project soon, maybe need to put on back burner untill a newer engine is found?
thanks for any help.

jfabmotorsports.com:
Need I repeat my self!  :roll:

http://www.kxriders.com/forums/index.php/topic,5982.0.html

byron909:
thanks, but i figured i'd ask in the appropriate place. why is the older cylinder more bulkier?? the parts thing is no big deal, i have a few spares for this motor. anyway, it seems the some of the major items interchange with 89 up, i don't care about having the latest engine design if i don't have to, but if there is another reason than i should i'm all for it.
thanks

don46:
The reality is that very few items interchange with 89 and up. tranny shafts are different, crank is different, clutch setup is different.  you could use the ignition if you have it complete, the right cover would work, reeds will work, intake manifold is different, cases are different. There are more parts that are different than there are the same.

kaw rider:
The real problem is finding spare parts or new parts when something breaks or wears out.

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