WSM Piston Kit - Yamaha 660 - Standard 50-544K Aircharger® Intake System It requires you use both

It requires you use both the front and rear docking hardware (two separate items that are not included and must be purchased separately)

Does not include tear-off posts

Structured crown and Flex back

2020-2023 KTM 500 EXC-F - - 2020-2023 KTM 350 EXC-F - - 2020-2022 KTM 150 XC-W TPI - - 2020-2022 KTM 300 XC-W TPI - - 2020-2022 KTM 350 XCF-W - - 2020-2022 KTM 500 XCF-W - - 2020 KTM 250 XC-W TPI - -

Baskets utilize stainless steel drive inserts where the clutch plate tabs make contact with the basket

WSM Piston Kit - Yamaha 660 - Standard 50-544K Aircharger® Intake System It requires you use bothQuality 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