PISTON KIT 08-11 YZF250 79.00, WISECO 4952M07900 YAMAHA MX

Part No. 56-W4952_200.WI (oro2u.com)
YAMAHA 2008 - 2011 YZF250 YZ250F,
Wiseco 4952M07900 79.00mm 13.5:1 Compression 263cc Motorcycle Piston Kit.