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20-singles
beer rubber
* Harder material eliminates the need for Thrust Washers
* Don’t take our word for it
* Firm feel for high-speed sweeping turns
Std Flat Top Pistons with 8.6:1 Compression Ratio. Fits Big Twin 1984-1999 with Evo Engine. Rear Fenders & Associated Parts 20-singlesFeatures & Benefits: * Bore = 3. 498" * Stroke = 4. 250" * 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 # 21940 83 Tech Tips: * 8. 6: 1 Compression Ratio with 80cc Head Chamber Volume. * Follow Ring End Gap & Piston to Cylinder Clearances as per the
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