Similar in design to the above listed pistons except these pistons are manufactured with a solid dome. JE pistons have the same deep valve reliefs to accommodate oversized valves and long duration, tight lobe separation cams. Precision CNC machined ring grooves accept 1/16, 1/16, 3/16 rings. JE pistons utilize dedicated left and right hand forgings.

Includes:

Pin #927-2750-15-51S (130g)

Double Spiro locks #927-042-CS

Compression Ratio:

50cc 15.8:1

54cc 14.6:1

58cc 13.6:1