KB926C040 Performance, 1340 Shovel forged piston kit. +.040"

For 1979 to 1984 1340cc Shovelhead engines requiring a significant overbore, this KB Performance forged piston kit provides a +.040 inch oversize solution. These pistons maintain a 9.0:1 compression ratio with a 112cc head and are forged from 4032 alloy for maximum structural integrity. This high-silicon alloy is specifically chosen for its ability to resist cracking under pre-ignition or detonation. The kit is sold as a set, complete with offset wrist pins, retaining rings, and piston rings. Proper installation is essential; the offset pins require the pistons to be oriented correctly to the front and rear of the engine. We recommend a piston-to-wall clearance that is .001 inch wider than stock cast specifications to ensure reliable performance under all riding conditions.