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1989 KX 500 engine for AF conversion

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Hey Guys

does anyone know much about the KX500 1989 engine - does it have the powervalve or did that come after 89 in later models?

I got a potential 89 that i could get hold of to put into a KX450F roller - my mate blew his 450 up and is not wanting to go thru the pain of fixing it. So i got a chance to do the conversion, has anyone got some more info on this?

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89 - 04 are pretty much the same engine. It has 3 KIPS valves. Slight changes here and there over the years.

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It's the engine with 3 valve's . Do you have every thing to make the 500 run ? If not you need the get the right cdi for that year . Every thing else is the same .

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yeah ive got a running 89 KX5 where the probably needs a once over to check out the seals and jug condition maybe also the bearings and possibly the gearbox - cause its been standing for 4 yrs and run around the back yard every second weekend - but ive yet to see it run or even rev out so we'll see

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