Pistons, Kb Perf 9.6:1 +.005" OS BT EVO 80Ci W/Pins, Locks, Rings 3.498" Std Bore Hi Compression

Pistons, Kb Perf 9.6:1 +.005" OS BT EVO 80Ci W/Pins, Locks, Rings 3.498" Std Bore Hi Compression

62187
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PERFORMANCE PISTON SETS FOR HARLEY DAVIDSON BIG TWIN

WEIGHT: 2.76
  • 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 COMPOSITON KEEPS HEAT CONFINED TO THE COMBUSTION CHAMBER AND REDUCES HEAT TRANSFER TO THE PISTON ITSELF PRODUCING A COOLER RUNNING PISTON
  • CAN BE FITTED WITH A CLEARANCE AS SMALL AS .00075"
  • 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 TOP 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
  • WRIST PINS MEASURE .792" O.D. ON SINGLE CAM MODELS AND .927" O.D. ON TWIN CAM MODELS
  • SEE THE ENGINE SECTION FOR REPLACEMENT RING SETS

KB PERFORMANCE PISTONS
STANDARD BORE & STROKE PISTON SET
FITS BIG TWIN EVOLUTION 80CI - 1340CC - 3.498"
9.6:1 DOME TOP PISTON
+.005" BORE
BY: KB PERFORMANCE PISTONS