ENGINE 254 PISTON KITS •All pistons are heat-treated with a T-5 hardening and tempering cycle •All piston skirts are coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston life •Cast piston kits are gravity-cast aluminum alloy (not forged) with 18% silicone content, which produces an extremely light but very strong piston •Forged pistons are forged from 2618 aluminum for superior strength and durability •Forged High Compression pistons improve power and torque across entire rpm range •Big Bore pistons increase engine’s displacement, torque, and peak horsepower •Forged Replica pistons are forged OE replacements •Replica pistons and all rings are OEM replacements •Kits include piston, rings, wrist pin and circlips •Replacement 2-stroke piston rings sold individually; four-stroke piston rings sold as a set PISTON VERSIONS Cast Replica – Cast OE replacement piston Cast Race – Unique cast GP style race piston with only one compression ring Cast Big Bore – Big bore stock compression cast piston Forged Replica – Forged OE stock compression piston Forged Big Bore – Forged OE stock compression big bore piston Forged Race – Unique forged GP style race piston with only one compression ring Forged High Comp – Forged high compression piston DIAMETER PISTON PISTON RING SET WRIST PIN CIRCLIP FITS MODEL (MM) VERSION KIT PART # PART # PART # PART # HONDA CRF250R 10-11 (Big Bore) (compression 13.2:1) 82.97 Forged Big Bore 0910-2591 - - - CRF250R 10-13 (high compression, 14.6:1) 76.78 Forged High Comp 0910-25984 - - - CRF250R 14-15 76.77 Forged Replica 0910-3406 - - - CRF250R 14-15 (high compression 14.1:1) 76.77 Forged High Comp 0910-3409 - - - 76.76 Forged High Comp 0910-3411 - - - 76.77 Forged High Comp 0910-3412 - - - CRF250R 15-17 (+3.2mm big bore, 14.6:1 compression) 80.00 Forged Big Bore 0910-4142 - - - CRF250R 16-17 76.78 Forged Replica 0910-4085 - - - CRF250R 16-17 (high compression 14.3:1) 76.76 Forged High Comp 0910-4097 - - - 76.78 Forged High Comp 0910-4099 - - - CRF250R 16-17 (high compression w/ T-Box 76.76 Forged High Comp 0910-4128 - - - forged piston and DLC-coated wrist pin) 76.78 Forged High Comp 0910-4130 - - - CRF250R 14-15 76.78 Forged High Comp 0910-3413 - - - XR400R 96-04 85.47 Forged Replica - 0912-0463 - - CRF450R/RX 17-18 (compression 13.9:1) 95.96 Forged Race 0910-4666 0912-0342 - 0913-0060 95.98 Forged Race 0910-4668 0912-0342 - 0913-0060 CRF450R/RX 17-21 (+3mm Big Bore) 98.95 Forged Big Bore - - - - HUSQVARNA FE250 17-21 (compression 12.8:1) 77.98 Forged Replica 0910-5142 - - - FE 450 17-21 (compression 11.8:1) 94.97 Forged Replica 0910-5151 - - - FE 450 17-21 (high compression 12.8:1) 94.96 Forged High Comp 0910-5153 - - - 94.97 Forged High Comp 0910-5154 - - - KAWASAKI KX80 92-00 47.94 Cast Replica (skirt not coated) 0910-1050 - - - KX250F 10 (+3mm Big Bore) 76.96 Forged Big Bore 0910-2587 - - - 76.98 Forged Big Bore 0910-2589 - - - KX250F 11-14 (compression 13.9:1) 76.96 Forged High Comp 0910-2573 - - - KX250F 15-16 76.95 Forged High Comp 0910-3693 - - - 79.96 Forged Big Bore 0910-3700 - - - KX250F 15-16 (high compression 14.3:1) 76.95 Forged High Comp 0910-3687 - - - 76.97 Forged High Comp 0910-3689 - - - KX250F (+3mm Big Bore) 76.96 Forged Big Bore 0910-3694 - - - KX250F 17 (high compression 14.7:1) 76.95 Forged High Comp 0910-4673 - - - KX250F 17-19 (+3mm Big Bore) 79.96 Forged Big Bore 0910-5172 - - - KX250F 17-19 76.95 GP Racer’s choice 0910-5182 - - - 76.96 GP Racer’s choice 0910-5183 - - - 76.97 GP Racer’s choice 0910-5184 - - - KX450F 09-12 (compression 13.2:1) 95.97 Forged High Comp 0910-2562 - - - KX450F 15-16 (high compression 13.0:1) 95.96 Forged High Comp 0910-3681 - - - 95.97 Forged High Comp 0910-3682 - - - 95.97 Forged High Comp 0910-3691 - - - 95.98 Forged High Comp 0910-3683 - - - 2 Require two rings per piston. 4 Features new T-box forgings and DLC-coated wrist pins on forged pistons with highest compression ratios for increased strength and performance.
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