KEITH BLACK PISTONS Std Flat Top Pistons with 9.1:1 Compression Ratio. Fits Sportster 1986-2003 with Big Bore 883cc to 1200cc Conversion.

Description

Features & Benefits:-

* Bore = 3.498in.

* Stroke = 3.812in.

* Hypereutectic Alloy is a cast 16% silicon content material.

* Perfect for air cooled engines.

* Low thermal expansion rate = tighter piston-to-cylinder clearance.

* Complete kit includes: two pistons, rings, wrist pins and clips.

Tech Tips:-

* Piston is 0.125in. below deck to achieve 9.1:1 Compression.

* Follow Ring End Gap & Piston to Cylinder Clearances as per the supplied