2003 KTM 250sx cylinder

BHed635
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BHed635
Edited Date/Time 3/30/2013 12:52am
Okay, dumb question time....which year model cylinders are compatable with my '03 250sx? I have a leak in the base gasket and have to remove the cylinder to replace. Going to do a "top end" while I have it apart. Can I do a larger displacement cylinder? Any suggestions for more low end "grunt"? I'm lost here.... Thanks guys!! BTW thanks for suggesting to send my tech 10s back to alpinestars for a resole. 70 bucks and they look and feel new again!
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ForToo
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ForToo 3/28/2013 8:29am
3/28/2013 8:29am
In 2003 they changed the stroke by 5mm, thus making those and later years compatible with 300 cylinders.
BHed635
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BHed635 3/28/2013 8:37am
3/28/2013 8:37am
ForToo wrote:
In 2003 they changed the stroke by 5mm, thus making those and later years compatible with 300 cylinders.
Thank you!!!! I'll look into that!
slipdog
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slipdog 3/28/2013 11:34am
3/28/2013 11:34am
Not for nothing, but I'm pretty sure they changed the rod length not the stroke in '03.
ForToo
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ForToo 3/28/2013 11:46am
3/28/2013 11:46am
Oh yeah that's right, thanks slip.

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rallendude
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rallendude 3/28/2013 11:51am
3/28/2013 11:51am
Probably find WAY more info on the mod you want to do over at ktmtalk.com .
yota
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yota 3/28/2013 1:04pm
3/28/2013 1:04pm
I had a 2004 250SX, bad ass motor. The 03 had even more.
resetjet
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resetjet 3/29/2013 5:56am
3/29/2013 5:56am
I am not sure on the 03 but I think you have the lighter sx crank. Put a 300 kit on it and you will have a monster. Power everywhere.
madmaxperformance 3/30/2013 12:52am
3/30/2013 12:52am
BHed635 wrote:
Okay, dumb question time....which year model cylinders are compatable with my '03 250sx? I have a leak in the base gasket and have to remove the...
Okay, dumb question time....which year model cylinders are compatable with my '03 250sx? I have a leak in the base gasket and have to remove the cylinder to replace. Going to do a "top end" while I have it apart. Can I do a larger displacement cylinder? Any suggestions for more low end "grunt"? I'm lost here.... Thanks guys!! BTW thanks for suggesting to send my tech 10s back to alpinestars for a resole. 70 bucks and they look and feel new again!
Hey man i have kne of thenoriginal 250sx valve stack ans shims for the back shock, from mxtech that motocross action raved so much about. I just never put it in. Let me mnlw if you are interested. Sorry for the spelling. Using my wifeys tablet and this thi g is awkward!

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