WSM Piston Kit - Yamaha 350 - Standard 50-540K Youth PowerCore Core Goggles Mirrored Lens All seams are tape sealed

All seams are tape sealed for 100% waterproof performance

part number etched in end of spring

RTS (Rapid Tuning System) 2019-2023 Yamaha YZ 450 FX - - 2019 Yamaha WR 450 F - - 2018-2024 Yamaha YZ 450 F - -

Muffler bodies have proprietary technology to prevent blueing

Synthetic suede reinforcements on side hand and fingers

WSM Piston Kit - Yamaha 350 - Standard 50-540K Youth PowerCore Core Goggles Mirrored Lens All seams are tape sealedQuality and construction that meets or exceeds OEM Feature improved E clip design Contain piston, rings, pin and clips Additional rings available separately Order one per cylinder Skirts have a nonabrasive, expansion retarding MOS2 coating to reduce heat and friction for added power and longevity MOS2 coating actually draws heat through piston walls and out the bottom Specially hardened tops add strength to ring grooves