Quote:
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Originally Posted by katoranger
Spud, is the cylinder different from a larger yamaha bore like the 225?
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Yes, Yamaha enlarged the bore and stroke of the XT225/TT-R225/TT-R230 cylinder to increase engine displacement from 196cc to 223cc. Zongshen enlarged the bore of the ZS250GS cylinder by 5.5mm to increase engine displacement from 196cc to 230cc. Therefore, the ZS250GS, 230cc cylinder sleeve is shorter, and larger in diameter than the Yamaha, 223cc cylinder sleeve.
Zonshen ZS250GS Engine Specifications: Bore 72.5mm, Stroke 55.7mm
Yamaha TW200 Engine Specifications: Bore 67.0mm, Stroke 55.7mm
Yamaha TT-R230 Engine Specifications: Bore 70.0mm, Stroke 58.0mm
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