+.030in. Flat Top Pistons with 8.6:1 Compression Ratio. Fits Big Twin 1984-1999 with Evo Engine. - Keith Black Pistons Honda * Will Not Fit Street

* Will Not Fit Street 500/750 (XG) Models

* Will not fit Road King or Trike models

* Replaces OEM # 46605-06 & 48745-08

For all Scorpion hubs except 1971-’83 Ironhead Sportster

+.030in. Flat Top Pistons with 8.6:1 Compression Ratio. Fits Big Twin 1984-1999 with Evo Engine. - Keith Black Pistons Honda * Will Not Fit StreetFeatures & Benefits: * Bore = 3. 528 * 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 # 21944 83 Tech Tips: * 8. 6: 1 Compression Ratio with 80cc Head Chamber Volume. * Follow Ring End Gap & Piston to Cylinder Clearances as per the