KX Riders

Maintenance & Technical => KX500 Original => Topic started by: JBlinky67 on March 17, 2005, 06:33:13 PM

Title: KX500-250 Conversion
Post by: JBlinky67 on March 17, 2005, 06:33:13 PM

Anyone done, or seen, a KX500 engine in a newer KX250 chassis? How difficult would this be? I would love to buy a 500, but the thing is SOOO outdated. Although I don't blame Kawi for never updating it. Any ideas?

Title: KX500-250 Conversion
Post by: Timbowe on March 17, 2005, 06:38:11 PM

Check the search out. Rocket science an outfit that supply a kit to Kx500 a alloy frame 250. Theres a few threads floating around here.

Title: KX500-250 Conversion
Post by: reknelb on March 18, 2005, 01:21:02 AM

I believe the rocket science kit was a steel 250 frame modified to accept the 500 engine and other parts? It used the 250 plastics so it looked alot newer cosmetically. I really cant find any decent info on it so I'm not 100% sure. I'm going to get a 2000 or newer rolling chassis (any brand) and transplant the kx500 engine. Hopefully I will find a roller by the end of summer and start the swap.

Title: KX500-250 Conversion
Post by: Ramski on March 18, 2005, 03:45:37 PM

The one RocketScience Racing Kit/Bike that I saw did not impress me.  After seeing a few CR500AFs, the RocketScience Kit looked like a Monster Garage production.  The Service Honda 500s look like they are from Honda and look sweet.  I'm waiting for the new KX450f and have someone put a KX500 motor in it.  Now that'll be SWEET!!!

Title: KX500-250 Conversion
Post by: reknelb on March 19, 2005, 01:43:20 AM

Quote from: Ramski

The one RocketScience Racing Kit/Bike that I saw did not impress me.  After seeing a few CR500AFs, the RocketScience Kit looked like a Monster Garage production.  The Service Honda 500s look like they are from Honda and look sweet.  I'm waiting for the new KX450f and have someone put a KX500 motor in it.  Now that'll be SWEET!!!

The rocket science kit was expensive too from whaT I remember ($1,500 for a frame??). There are a ton of guys who Have built cr500af's themselves. Seems to me a kx250/500 would be easier. No alum to weld. Although I think the steel is a chromoly that has to be heat treated after weld (or something like that). Maybe we should all start making our own 250/500 conversions and post all the info on how to do it in one thread.

I know I could pick up a 98-2002 kx250 locally for around 1500-2000. Probly make about 500 selling the 250 engine on evilbay.

Title: KX500-250 Conversion
Post by: mikesmith on March 21, 2005, 08:40:00 PM

Its been done and posted "how to"on this forum a while back,was for a Motard bike.Motowerks,something like that used to do them around the same time Service Honda started doing the CRs,but they didnt last long.Go for it!