JE Pistons are machined by the most advanced CNC machining technologies available. JE forged Pistons are trusted by racers and engine builds for dependability. FSR (Forged Side Relief) slipper forging design allows the use of the most popular stroke and rod combinations while eliminating reluctor wheel clearance problems. Lightweight and extremely durable, these pistons are machined for 1.5, 1.5, 3.0mm rings (Compression ratio is calculated with .042 gasket thickness and 0.00? deck clearance). Fits L92 head. Pin #927-2250-15-51C (111g), wire locks #927-073-MW, accumulator grooves, double forced pin oilers, and contact reduction grooves are included.

Compression Ratio with 64cc Heads 12.1:1
Compression Ratio with 66cc Heads 11.9:1