NEW AND GENUINE KEITH BLACK PERFORMANCE PISTON KIT FOR HARLEY DAVIDSON IRONHEAD SPORTSTER                   

( AUTHORIZED US DEALER)The Keith Black name should say enough about the quality of these pistons. 967 Custom Cycles is an authorized dealer for Mid-USA and I can be found on their dealer locator as well as Facebook for thousands of replacement and custom partsWeight: 2.51

• Spawned from this successful manufacturer's line of automotive pistons
• Lightweight, permanent mold cast pistons
• Manufactured
• from Hypereutectic 390 Alloy, contain 16-18% silicon and heat treated
• to T6 specifications producing a stronger than stock piston
• Special
• alloy composition keeps heat confined to the combustion chamber and
• reduces heat transfer to the piston itself production a cooler running
• piston
• Piston expansion is reduced by as much as 20% over conventional pistons
• Less piston rock, better ring support, more durability, and better retained compression for maximum power
• The
• key feature to these pistons is the accumulator groove between the tip
• and second ring which averages the normal pressure between the first
• and second ring, keeping the pressure low enough to prevent lifting of
• the top ring while maintaining preload on the second (oil scraping) ring
• Each set of pistons includes wrist pins, spiral locks, engine assembly lube, and Hastings moly rings
• Order 65199 for replacement wrist pin lock (sold each)
• Wrist pins measure .792" O.D.
• Replacement rings are available
• KB Performance Pistons
• Fits Ironhead Sportster 1972/1985 1000cc (61ci)
• Standard bore =3.188"
• 8.2:1 compression ratio Dome Top Piston
• Standard Bore
• Note:
• It is not recommended to bore 1972/Early 1973 models more than +.030"
• By: KB PERFORMANCE PISTONS
• Flat rate shipping is for domestic only
• Please ask any questions prior to purchase