1000cc Piston set .010 oversize for Harley-Davidson Sportster 1972-1985
$295.76
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- Keith Black piston set is .010 oversize with a 8.2 compression ratio for 1972-1985 XL 1000cc models
- The Keith Black 390 hypereutectic alloy is cast in a permanent steel mold which makes it possible to build a light weight piston that makes more power and uses less fuel and lasts longer
- The low heat transfer of the alloy keeps the skirts cool so piston expansion is minimal
- The combination of a low heat transfer piston alloy and high compression ring placement increases power and economy
- The high ring placement alone reduces detonation and increases the top ring temperature
- Run engine at moderate speeds for at least 500 miles, avoiding excessive running in lower gears, in order to properly break-in new pistons and rings
- Fits 1972-1985 Sportster XL Ironhead models
- Made in USA