ELECTRICAL SECTION RED PART NUMBERS INDICATE NEW PARTS 1-109 1 2 3 4 5 6 7 8 9 10 11 CONTENTS ELECTRICAL FRAME FRONT END CONTROL WHEEL ENGINE DRIVE TRAIN FUEL EXHAUST GENERAL REFERENCE Spark Plugs U-GROOVE PLATINUM SPARK PLUGS Key Features: Platinum Tip Center Electrode is bonded to massive copper core for superior conductivity and power U-Groove Ground Electrode Develops a larger spark for more complete combustion Insulator and Five Rib Construction Insulator made of highly purified alumina powder - superior in strength and thermal conductivity Copper-Glass Seal Glass and copper powder bond the center electrode to the insulator by electroforming process to assure a gas tight seal Electric Heat Seal Seals tighter for a stable heat range Machine Rolled Threads For trouble free spark plug installation and removal • Manufactured from the best materials available for long, trouble free operation. • The premium quality platinum tip is more durable than standard plug material so the spark plug will maintain the proper gap much longer. • The pure copper center electrode reduces fouling. • The proper spark plug gap requires less voltage to fire so you will have fewer misfires for long periods of use. • Easier starting, improved fuel economy, smooth idling and quicker acceleration are just a few benefits of Accel platinum spark plugs. 2 24 Rpls. Pack Pack Model & Year HD Code Rpls. HD Gap Mfg. # Part # Part # 1200cc & 1340cc Shovelhead, all models with 5R6A 32311-83 .040” 2410P 18047 18053 Electronic Ignition Hot Plug Late 1977/1981 1340cc Evolution, Electronic Ignition Hot Plug 5R6A 32311-83 .040” 2410P 18047 18053 1984/Later Twin Cam, all models 1999/Later 6R12 32317-86A .040” 2418P 18051 18055 Sportster Evolution, all models 1986/Later 6R12 32317-86A .040” 2418P 18051 18055 HELPFUL HINT Tighten spark plugs to 18-28 ft. lbs. of torque. If you are unable to tighten with a torque wrench then tighten an additional 1/4 turn past finger tight. Platinum Tip
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