KX Riders

Maintenance & Technical => KX250 / KX125 => Topic started by: cnata on March 14, 2015, 12:18:54 PM

Title: 93 kx250 motor swap
Post by: cnata on March 14, 2015, 12:18:54 PM

Does anyone know what year motors will work with the 93 frame even with light modification

Title: Re: 93 kx250 motor swap
Post by: DoldGuy on March 14, 2015, 01:34:54 PM

92-02...

Title: Re: 93 kx250 motor swap
Post by: motopunk on March 14, 2015, 09:26:49 PM

the 93 kx250 frame will work also with all engines with straight exhaust and front headstay... 88-91 have still the smaller swingarm shaft and motormounts. this must be bored to the right size.  88/89 motors also need the 90/91 cylinderhead with the front-mounting..
92-2002 fits without mods (except the smaller cases 94-2004), where you need bushings between engine and swingarm ..
for the 03/04 motors you need an 94-2002 cylinderhead for the frontmounts ...

...and any kx500 motors does also fit with light mods..  :wink:

Title: Re: 93 kx250 motor swap
Post by: shrubitup on March 16, 2015, 04:58:31 PM

Don't forget to source a matching year electric system to go with the motor choice.

Title: Re: 93 kx250 motor swap
Post by: cnata on March 17, 2015, 10:47:12 AM

Does that mean I can use the cylinder from any of those years on my 93 bottom end.I have the bottom end just not the top thats my issue

Title: Re: 93 kx250 motor swap
Post by: shrubitup on March 18, 2015, 06:28:29 PM

Quote from: cnata on March 17, 2015, 10:47:12 AM

Does that mean I can use the cylinder from any of those years on my 93 bottom end.I have the bottom end just not the top thats my issue

Can use cylinder and head up to 02. If a 03/04 cylinder then you need a 92-02 head to fit your 93 frame.

Title: Re: 93 kx250 motor swap
Post by: cnata on March 19, 2015, 10:44:39 AM

Thank you very much for that information now I can go foward with buying the parts I need