+.040in. Flat Top Pistons with 9.0:1 Compression Ratio. Fits Sportster 1986-2021 with 1200cc Engine & Sportster 1986-1987 with 1100cc Engine.

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Features & Benefits:-* Bore = 3.538in. * 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:-* 9.0:1 Compression Ratio with 69cc Head Chamber Volume.* Follow Ring Eng Gap & Piston to Cylinder Clearances as per the supplied Man ufacturers Instructions.* Pull the engine down first & measure the existing bore to determine if oversize pistons are required PRIOR to purchase, we do not take back piston kits. The onus is on the assembling technician to validate the cylinders & required pistons.
MFR PART No: KB264.040

ROLLIES PART No: KB264.040






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