Achieve perfect tuning for your SR with genuine quality!
Manufactured at a factory designated by YAMAHA with equivalent quality and quality control standards.
These are MADE IN JAPAN piston rings with a 0.5mm oversize.
『Casting Long Life 87.5φ Piston for SR500 +0.5mm』
『Casting Long Life 87.5φ Piston for SR400 +0.5mm』
These pistons are exclusively for the above two models manufactured by our company.
※These are delicate parts. Exercise extreme caution during storage and assembly.
※Entrust boring, honing, and assembly work to a reliable internal combustion engine machining shop or motorcycle shop.
Recommended Clearance: Please specify 0.049 to 0.055mm (0.0019 to 0.0022 In) when requesting.
※After assembly, always perform proper break-in operation before normal riding.
※Normal riding without performing the ‘break-in’ may cause engine seizure or premature wear.