+.020in. Dome Top Pistons with 8.2:1 Compression Ratio. Fits Sportster 1972-1985 with 1000cc Engine. - Keith Black Pistons Lifts 94 ratio) - Mainshaft &

94 ratio) - Mainshaft & Countershaft

reliable braking performance

* 49mm Clamping

Compressor Assembly:

+.020in. Dome Top Pistons with 8.2:1 Compression Ratio. Fits Sportster 1972-1985 with 1000cc Engine. - Keith Black Pistons Lifts 94 ratio) - Mainshaft &Features & Benefits: * Bore = 3. 208" * Stroke = 3. 812" * Fits Iron Head Sporty. * Hypereutectic Alloy is a cast 16% silicon content material. * Perfect for air cooled engines. * Low thermal expansion rate = tighter piston to cylinder clearance. * Complete kit includes: two pistons, rings, wrist pins and clips. * Replaces OEM # 22254 83 Tech Tips: * 8. 2: 1 Compression Ratio with 110cc Head Chamber Volume. * Follow Ring End Gap & Piston to Cylinder