BOLD MAGENTA part numbers are new for 2026 PARTS-UNLIMITED.COM 2026 | STREET ENGINE ENGINE 1384 DISCLAIMER: *EMIS (EMISSIONS CATEGORIZATION CODE). SEE PAGES 4-6 FOR CATEGORY CODES, IMPORTANT EPA/CARB EMISSION DEFINITIONS AND REGULATORY COMPLIANCE AND NOTICE REGARDING NOISE REGULATIONS. PRODUCTS NOT LEGAL FOR SALE OR USE IN CALIFORNIA ON ANY POLLUTION CONTROLLED MOTOR VEHICLES IF NOT CATEGORIZED AS “1” OR “4”. FITS MODEL DISPLACEMENT BORE OVERSIZE COMPRESSION RATIO PART # SUZUKI GSX1300R Hayabusa 99-07 1363cc 83 mm +2 mm 13.5:1 0910-6397 1397cc 84 mm +3 mm 13.5:1 0910-6398 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 PISTONS • From Daytona to Bonneville, JE Pistons continues to set the standards in street bike piston design •JE has recorded wins at Daytona with American Honda’s CBR600RR, low ETs on the drag strip and land speed records at Bonneville •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 • Pins, pin fitment, lock and rings included •Made in the U.S.A. 0910-5771 •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 0910-6398
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