Keith Black piston set for 80 inch Evo. Piston set has a compression of 9.6:1 and includes rings.

Keith Black piston set is for a 3.498" bore ( 80 inch Evo) . Piston set has a compression of 9.6:1 and includes rings.

SIZE:   STD, . 010, . 020, . 030, . 040

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 standard size, for a 3.498" bore and has a 9.5:1 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.

Vt-11-2257

Vt-11-2259

Vt-11-2260

Vt-11-2261