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Originally Posted by katoranger
I don't know if the cylinder wall would be thick enough for that. I also think that the xt250 is a different case from the tw/xt200 so the cylinder probably wouldn't work.
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The ZS250GS cylinder bore is 72.5mm, and the XT250 piston is 74mm in diameter. Therefore, the difference is 1.5mm, which might work. However, I would certainly defer to a machinist's judgement.
I think any piston with a diameter of 72.5mm and a wrist pin with the correct diameter to fit the connecting rod will work.
The XT250 engine case is
definitely different from the Zong/TW200 engine case. An XT250 cylinder would not fit the ZS250GS crankcase. :(
Spud
__________________
Spud
"Never argue with an idiot. He will drag you down to his level, and beat you with experience."
Mark Twain
2015 Zongshen ZS250GY-3 (RX3)
2006 Zongshen ZS200GY-2 (Sierra 200)
2005 Honda XR650L
2004 Honda CRF250X
1998 Kawasaki KDX220
Mods made to my Zongshen ZS200GY-2:
http://www.chinariders.net/showthread.php?t=6894