Piston Kit & Rings Set STD 57.00mm Fit for Yamaha YZF-R15 FZ 150 155cc 11-18 UK
(will not fit with R15 VVA Version 155cc 2018-2019). Piston Pin Ring Set STD Bore Size Ø57.00mm Fit for Yamaha YZF R15 R-15 FZ 150 2011-2018. Prevent excessive oil from entering the combustion chamber and to fully lubricate the cylinder wall.