BOLD MAGENTA part numbers are new for 2025 PISTON & PISTON KITS PARTS-UNLIMITED.COM ATV/UTV | 2025 PISTON & PISTON KITS 1079 POWERSPORTS ULTRA SERIES PISTON KITS •In-house forging has allowed JE to develop proprietary Aligned Grain Flow Technology forging technology that directs the grain flow of the aluminum to flow around critical areas of the piston, increasing strength •Lateral gas ports channel combustion gases to the back of the top ring groove, which adds pressure behind the compression ring to keep it pushed against the cylinder, providing improved and more consistent ring seal, critical in boosted applications •Ultra-thick ring lands aid in maintaining ring stability in forced induction and high-horsepower N/A engines, contributing to consistent ring seal and consistent power •Thermal Barrier Crown Coating – a ceramic coating on the piston crown – greatly reduces heat transfer into the piston material, decreasing fatigue and improving longevity • Tuff Skirt – a proprietary, moly-based dry film skirt coating is applied in-house and reduces operating friction for better wear resistance •Accumulator groove provides additional volume to trap unwanted gases below the top ring to keep pressure low and ring seal and performance high •Double pin oilers – two oil channels feed into the pin bore to maintain proper lubrication to improve wrist pin and pin bore wear resistance • Includes upgraded 9310 wrist pins: stronger, thicker wrist pin material is designed to withstand additional loads of forced induction applications • Sold as a complete kit with all necessary pistons, rings, wrist pins and wire locks under one part number FITS MODEL DISPLACEMENT BORE OVERSIZE COMPRESSION RATIO WEIGHT (GRAMS) SKIRT PART # ARCTIC CAT Wildcat 1000i 12-14, Prowler 1000/TRV1000 09-17 994cc 94 mm +2 mm 11.5:1 310 FSR 0910-5926 CAN-AM DS650 02-03 651cc 100 mm STD 11.5:1 373 FSR 0910-5844 HONDA TRX400EX 99-08/TRX400X 09-17 406cc 86 mm +1 mm 10.6:1 294 Round 0910-5837 415cc 87 mm +2 mm 10.8:1 294 Round 0910-5838 415cc 87 mm +2 mm 12:1 285 Round 0910-5829 435cc 89 mm +4 mm 10.8:1 273 Round 0910-5853 435cc 89 mm +4 mm 12:1 268 Round 0910-5830 PISTON KITS •Machined from 2618-T6 high-tensile forged aluminum •Dome/dish features smooth flowing radii; require no deburring or preparation •JE designs are specifically engineered for extreme applications, including professional competition •Pro Series pistons available for select models: features include internal and external bracing, dedicated embossed forgings for weight reduction, specialized processes such as internal milling the internal struts, along with dedicated accumulator groove and forged side relief 0910-5849 • Pins, pin fitment, lock and rings included •Made in the U.S.A. 0910-6524 FITS MODEL DISPLACEMENT BORE OVERSIZE COMPRESSION RATIO SKIRT PART # HONDA Pioneer 1000 21-22, 999cc 92 mm STD 9:1 FSR 0910-6524 Talon 1000R 19-22, 999cc 92 mm STD 11:1 FSR 0910-6525 Talon 1000X 19-22 KAWASAKI Teryx KRX1000 20-22 999cc 92 mm STD 9.5:1 FSR 0910-6526 999cc 92 mm STD 11.5:1 FSR 0910-6527 POLARIS RZR XP Turbo 16-23 925cc 93 mm STD 9:1 FSR 0910-6532 925cc 93 mm STD 9.5:1 FSR 0910-6533 RZR XP 1000 14-21/General 1000 EPS 16-20, 999cc 93 mm STD 9.5:1 FSR 0910-6530 RZR RS1 18-22 999cc 93 mm STD 10.5:1 FSR 0910-6531 PISTON KITS continued on next page.
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