BOLD MAGENTA part numbers are new for 2022 PISTON & PISTON KITS PARTS-UNLIMITED.COM OFFROAD | 2022 PISTONS continued on next page. 1177 FITS MODEL DISPLACEMENT BORE OVERSIZE COMPRESSION RATIO WEIGHT (GRAMS) SKIRT PART # SUG. RETAIL HONDA CRF150R 07-12 149cc STD 66mm 12.5:1 112 FSR 0910-5873 $243.95 170cc +4mm 70mm 13.0:1 126 FSR 0910-5878 243.95 XR250 86-04, XR250L 91-96 277cc +4mm 77mm 10.5:1 215 Round 0910-5836 212.95 CRF250R 04-09, CRF250X 04-17 249cc STD 78mm 13.2:1 150 FSR 0910-5852 243.95 Pro Series 249cc STD 78mm 13.7:1 150 FSR 0910-5879 243.95 CRF250R 10-15 249cc STD 76.8mm 13.8:1 149 FSR 0910-5904 243.95 Pro Series 249cc STD 76.8mm 14.2:1 151 FSR 0910-5905 243.95 CRF250R 16-17 - Pro Series 249cc STD 76.8mm 14.5:1 NEW FSR 0910-5942 323.95 XR400R 96-04 406cc +1mm 86mm 10.6:1 294 Round 0910-5837 212.95 415cc +2mm 87mm 10.8:1 294 Round 0910-5838 212.95 415cc +2mm 87mm 12.0:1 285 Round 0910-5829 243.95 426cc +3mm 88mm 11.0:1 298 Round 0910-5841 212.95 426cc +3mm 88mm 13.0:1 318 Round 0910-5840 212.95 435cc +4mm 89mm 10.8:1 273 Round 0910-5853 243.95 435cc +4mm 89mm 12.0:1 268 Round 0910-5830 243.95 CRF450R 02-08, CRF450X 05-17 449cc STD 96mm 12.5:1 273 FSR 0910-5886 243.95 449cc STD 96mm 13.5:1 282 FSR 0910-5887 243.95 488cc +4mm 100mm 12.5:1 303 FSR 0910-5888 243.95 CRF450R 02-08, CRF450X 05-17 449cc STD 96mm 13.5:1 255 FSR 0910-5872 263.95 Pro Series 449cc STD 96mm 14.0:1 256 FSR 0910-5903 263.95 CRF450R 09-12 – Pro Series 449cc STD 96mm 13.5:1 253 FSR 0910-5890 263.95 CRF450R 13-16 - Pro Series 449cc STD 96mm 13.5:1 257 FSR 0910-5923 263.95 CRF450R/CRF450RX 17-21, CRF450R-WE 19 449cc STD 96mm 13.5:1 NEW FSR 0910-5943 343.95 Pro Series 449cc STD 96mm 14.0:1 NEW FSR 0910-5944 343.95 449cc STD 96mm 14.5:1 NEW FSR 0910-5945 343.95 XR600R 85-01 629cc +3mm 100mm 10.5:1 380 Round 0910-5831 212.95 640cc +4mm 101mm 10.6:1 397 Round 0910-5832 212.95 654cc +5mm 102mm 10.8:1 395 Round 0910-5833 212.95 XR650L 93-16 650cc +1mm 101mm 9.0:1 389 Round 0910-5906 212.95 644cc STD 100mm 10.5:1 398 Round 0910-5912 212.95 650cc +1mm 101mm 10.5:1 396 Round 0910-5913 212.95 657cc +2mm 102mm 10.5:1 408 Round 0910-5914 212.95 644cc STD 100mm 11.25:1 399 Round 0910-5834 212.95 657cc +2mm 102mm 11.25:1 406 Round 0910-5839 212.95 HUSABERG FE 450 13-14 450cc STD 95mm 13.5:1 259 FSR 0910-5934 263.95 HUSQVARNA FC450 14-15, FE 450 14-16, FX 450 17 450cc STD 95mm 13.5:1 259 FSR 0910-5934 263.95 KAWASAKI KX250F 10-14 - Pro Series 249cc STD 77mm 14.0:1 148 FSR 0910-5907 243.95 KX250F 17-18 - Pro Series 249cc STD 77mm 14.0:1 - FSR 0910-5948 323.95 KX250 21 249cc STD 78mm 14.1:1 142 FSR 0910-6390 251.95 249cc STD 78mm 14.5:1 142 FSR 0910-6391 251.95 KLX 400 03 398cc STD 90mm 12.0:1 287 Round 0910-5842 212.95 434cc +4mm 94mm 12.0:1 303 FSR 0910-5843 212.95 KX450F 06-14/16-18 (does not fit 15) 449cc STD 96mm 12.8:1 272 FSR 0910-5899 243.95 449cc STD 96mm 13.5:1 275 FSR 0910-5900 243.95 449cc STD 96mm 12.8:1 258 FSR 0910-5901 263.95 449cc STD 96mm 13.5:1 264 FSR 0910-5902 263.95 KTM 450 SX-F 13-15, 450 EXC / XC-F / XC-W 12-16 450cc STD 95mm 13.5:1 259 FSR 0910-5934 263.95 SUZUKI RM-Z250 10-18 – Pro Series 249cc STD 77mm 14.2:1 151 FSR 0910-5908 243.95 DR-Z 400 00-18 398cc STD 90mm 12.0:1 287 Round 0910-5842 212.95 434cc +4mm 94mm 12.0:1 303 FSR 0910-5843 212.95 RM-Z 450 13-21 449cc STD 96.0mm 13.5:1 258 FSR 0910-5929 263.95 Pro Series 449cc STD 96.0mm 14.5:1 266 FSR 0910-5930 263.95 DR 650 96-11 650cc STD 100mm 10.5:1 375 Round 0910-5759 212.95 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. 0910-5837 0910-5857
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