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VT#: 11-2241

Keith Black piston set is .010 oversize with a 8.2 compression ratio for 1972-1985 XL Sportster® 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. Pistons are .010 oversize, for a 3.188" bore and has a 9:1 compression ratio. 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.
**NOTE: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.

XL Sportster® 1972-1985

1000cc Piston Set .010 Oversize

11-2241

VT#: 11-2241Keith Black piston set is .010 oversize with a 8.2 compression ratio for 1972-1985 XL Sportster® 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 an...
  • Shipping Weight: 2.45lbs
  • Manufactured by: S&S Cycle
In Stock
$247.47

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This product was added to our catalog on Tuesday 07 January, 2014.