Keith Black piston set is .030 oversize and is for a 3-3/4" bore. Piston set has a compression of 10.6:1 and includes rings.

VT No: 11-2273
Keith Black piston set is .030 oversize and is for a 3-3/4" bore. Piston set has a compression of 10.6:1 and includes rings.
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 .030 oversize, for a 3-3/4" bore and has a 10.6:1 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:
FXST 1999-2006
FLST 1999-2006
FXD 1999-2006
FLT 1999-2006
UOM: 2 - SET
Country of Origin: Imported

Manufacturer: Keith Black
2018 Catalog pages: 183

2017 Catalog Page: 183

V-Twin Manufacturing Part Number: 11-2273
Manufacturer: Keith Black
Manufacturer Part Number: KB343 .030

Harley-Davidson & Indian OEM Cross Reference Part Numbers:            

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