WSM Piston Kit - Honda 420 - +1 mm 50-231-07K Track Jacket — Yamaha 2007-2014 Yamaha WR 250 F

2007-2014 Yamaha WR 250 F - Notes: 2007-2010Must use YZ250F/450F '06-'09 shrouds

With A-CS ® Plus

Delivers a slip-free performance under any conditions

The foot shell incorporates heel and toe protection and is highly resistant against abrasion and impact while adding to the boots overall durability

Forest legal spark arrestor will meet the mandated 96dB sound level set by the US Forest Service making it the quietest 2-stroke performance spark arrestor made

WSM Piston Kit - Honda 420 - +1 mm 50-231-07K Track Jacket — Yamaha 2007-2014 Yamaha WR 250 FQuality 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