FR651V | Kawasaki - Lawn Mower Engines - Small Engines Pros trust Kawasaki power for dogged toughness in their machines, year after year. That same strength and quality is ready for deployment at home in the all-new FR Series engines. The FR Series brings a 4-cycle V-twin powerplant to a range of sizes from 18 hp to 26 hp. SAE-Certified Critical Power.Bore x Stroke: 3.1 x 3.0 in. (78 x 76mm)Displacement: 726 cc (44.3 cu. in.)Compression Ratio: 8.2:1Number of Cylinders: 2 Amazon: fr651v fuel filter Coolwind 11013-7047 Air Filter 49065-7007 Oil Filter Fuel Filter for Kawasaki FR651V FR691V FR730V FS481V FS541V FS600V FS651V FS691V FS730V FX600V 4-Cycle Engine Tune Up Kit. $17 $ 17. 99. FREE Shipping.