KB Performance, 1200Cc B.T. Piston Kit. Std For Harley Davidson

Compatible with stock cylinders and heads, gives stock compression ratio.
8.5:1 CR.
Piston weight 370gr.
Piston pin weight 97gr.
Head type: Dome 0.656"
/ Dome -57cc. Compression height 1.450". Bore 3.4375"
/ Stroke 3.969" (3-31/32"). Rod length 7.440"
/ Cyl. length 5.330".
Comes with T6 heat treated 390 Hypereutectic cast pistons with 16% silicone levels which enables running a very tight clearance for longevity and hardly any piston noise.
Note: Top compression ring will need additional clearance.
See instructions.

Fits: > 41-78 74"/1200cc Knuckle, Pan, Shovel (NU)