Standard Bore Cylinder Kit (RT1701). This product is a complete Standard Sized Replacement Cylinder Kit. The cylinder Bore is 64.00mm. The Stroke is 54.00mm. The cylinder Displacement is 347cc / Compression 6.5:1. This product is tested to Exceed Original Equipment Standards and Performance. This product includes Piston Kit, Gasket Kit, OE Type Cylinder. The products are direct Replacement Parts for Hassle-Free Installation. REPLACES OEM PART NUMBER(S).