Pistons Keith Black Perf 9:1 +.030"Os Sportster 88 / 03 1200Cc W / Pinstrument Locks Rings #Kb264.030

Pistons Keith Black Perf 9:1 +.030"Os Sportster 88 / 03 1200Cc W / Pinstrument Locks Rings #Kb264.030

62276
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PERFORMANCE PISTON KITS FOR HARLEY DAVIDSON SPORTSTER

WEIGHT: 2.71
  • 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 EVOLUTION SPORTSTER 1988/2003 1200CC (74CI)
    STANDARD BORE =3.498"
    9:1 COMPRESSION RATIO FLAT TOP PISTON
    +.030" BORE
    BY: KB PERFORMANCE PISTONS