Wiseco K1643 Piston Kit for 1984-1999 Harley Davidson Evo Big Twin 1340 - 3.528i feed-mpn-18-2910 1997 Yamaha Big Bear 350

1997 Yamaha Big Bear 350 4x4

They are equipped with full length 2

Use original spring & retainer where applicable

1982 Yamaha XT500

Wiseco K1643 Piston Kit for 1984-1999 Harley Davidson Evo Big Twin 1340 - 3.528i feed-mpn-18-2910 1997 Yamaha Big Bear 350Wiseco Forged Piston Kit Part Number: K1643 Valve pocket designs allow maximum flow around the valve, allowing the use of oversized valves and high lift cams. Piston crown shapes are designed to promote the maximum intake charge efficiency through a scavenging mixture Cross Flow during intake and exhaust valve overlap. More fuel and air equals more horsepower. Piston domes are designed for optimal quench during the compression combustion cycle,