S&S Cycle SS920-0143 Standard Dome Top Pistons w/11:1 Compression Ratio for Royal Enfield 650 Twins 19-Up

These high compression pistons feature a 7cc raised dome to achieve a compression ratio of 11:1 (from 9.5:1). Higher compression is a key factor in increasing performance.

* Suggested Additional Purchase: S&S Cam # SS330-0709

* We Strongly advise that you upgrade your clutch to Barnett Clutch #

B-303-28-10001

Tech Tips:-

* Follow Ring End Gap & Piston to Cylinder Clearances as per the supplied Manufacturers Instructions.

* Pull the engine down first & measure the existing bore to determine if oversize pistons are required PRIOR to purchase, we do not take back piston kits. The onus is on the assembling technician to validate the cylinders & required pistons.