2017 Yamaha YZ, YZ-F, YZ-FX, and WR's Announced | Dirt Rider
Vertex Piston High Compresion - Yamaha WR250F YZF250
YAMAHA YZF 250 2014-2015 PISTON KIT (STANDARD COMPRESSION 13.5 : 1) | at Motocross Parts UK | Motocross Parts UK
Amazon.com: Vertex High Comp Forged Piston Kit 23942B Compatible With/Replacement For Yamaha WR 250 F 2015-2017, YZ 250 F 2014-2016 1SM-116A0-01-00 : Automotive