ENGINE 270 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 DISP. BORE COMP. SUG. DLR. SALE FITS MODEL (CC) (MM) OVERSIZE RATIO PART# RETAIL COST PRICE KAWASAKI ZX14 06-11 1417cc 86mm +2mm 13.5:1 0910-6394 N/A $760.47 $378.80 ZX14 12-19 1417cc 86mm +2mm 14.1:1 0910-6394 N/A 760.47 378.80 SUZUKI GSX1300R Hayabusa 99-07 1330cc 82mm +1mm 13.5:1 0910-6396 N/A 760.47 360.80 1429cc 85mm +4mm 13.5:1 0910-6399 N/A 760.47 360.80 GSX1300R Hayabusa 08-19 1407cc 83mm +2mm 13.5:1 0910-6401 N/A 760.47 378.80 0910-6394 OFFROAD PISTONS •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 •Pins, pin fitment, lock and rings included •Made in the U.S.A. DISP. BORE COMP. WEIGHT SUG. DLR. SALE FITS MODEL (CC) (MM) OVERSIZE RATIO (GRAMS) SKIRT PART# RETAIL COST PRICE HONDA CRF250R 16-17 - Pro Series 249cc STD 76.8mm 14.5:1 NEW FSR 0910-5942 N/A $239.81 $148.20 XR600R 85-01 629cc +3mm 100mm 10.5:1 380 Round 0910-5831 N/A 157.63 97.40 YAMAHA YZ450F 14-17, YZ450FX 16-17, WR450F 16-17 - Pro Series 3-ring 450cc STD 97mm 12.8:1 268 FSR 0910-5938 301.95 195.68 120.90
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