11-2216 80 Evolution Flat Piston Kit Standard

Keith Black flat piston set is standard size with a compression ratio of 8.6:1 for 1984-up Big Twin Evolution 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 standard size for a 3.498 bore and has a 8.5:1 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.

Fits:
FLST 1986-1998
FLT 1984-1998
FXD 1991-1998
FXR 1984-1994
FXST 1984-1998

UOM: SET
Country Of Origin: MEXICO
Suggested Items: 11-1363 - 80 Shovelhead Piston Ring Set Standard

Accessory Items:
16-0622 - Ring-O-Matic Ring Compressor Tool Kit
16-0075 - Wrist Pin Ring Tool

Tech Notes: Use the ring end gap instructions to avoid ring butting.