BOLD MAGENTA part numbers are new for 2026 PARTS-UNLIMITED.COM 2026 | OFFROAD PISTON & PISTON KITS PISTON & PISTON KITS 1432 FITS MODEL DISPLACEMENT BORE OVERSIZE COMPRESSION RATIO WEIGHT (GRAMS) SKIRT PART # HONDA (CONT) CRF450R 02-08, CRF450X 05-17 449cc STD 96 mm 12.5:1 273 FSR 0910-5886 449cc STD 96 mm 13.5:1 282 FSR 0910-5887 488cc +4 mm 100 mm 12.5:1 303 FSR 0910-5888 CRF450R 02-08, CRF450X 05-17 449cc STD 96 mm 13.5:1 255 FSR 0910-5872 Pro Series 449cc STD 96 mm 14:1 256 FSR 0910-5903 CRF450R 09-12 – Pro Series 449cc STD 96 mm 13.5:1 253 FSR 0910-5890 CRF450R 13-16 - Pro Series 449cc STD 96 mm 13.5:1 257 FSR 0910-5923 CRF450R/CRF450RX 17-21, CRF450RWE 19-24 449cc STD 96 mm 13.5:1 NEW FSR 0910-5943 Pro Series 449cc STD 96 mm 14:1 NEW FSR 0910-5944 449cc STD 96 mm 14.5:1 NEW FSR 0910-5945 XR600R 85-01 640cc +4 mm 101 mm 10.6:1 397 Round 0910-5832 654cc +5 mm 102 mm 10.8:1 395 Round 0910-5833 XR650L 93-23 650cc +1 mm 101 mm 9:1 389 Round 0910-5906 644cc STD 100 mm 10.5:1 398 Round 0910-5912 650cc +1 mm 101 mm 10.5:1 396 Round 0910-5913 657cc +2 mm 102 mm 10.5:1 408 Round 0910-5914 644cc STD 100 mm 11.25:1 399 Round 0910-5834 HUSABERG FE 450 13-14 450cc STD 95 mm 13.5:1 259 FSR 0910-5934 HUSQVARNA FC 450 14-15, FE 450 14-16, FX 450 17 450cc STD 95 mm 13.5:1 259 FSR 0910-5934 FC 450 23-25, FE/FS/FX 450 23-25 450cc STD 95 mm 13.5:1 - FSR 0910-6852 450cc STD 95 mm 14:1 - FSR 0910-6853 KAWASAKI KX250F 17-18 - Pro Series 249cc STD 77 mm 14:1 - FSR 0910-5948 KX250 21-22 249cc STD 78 mm 14.1:1 142 FSR 0910-6390 249cc STD 78 mm 14.5:1 142 FSR 0910-6391 KX250 23-24 249cc STD 78 mm 14.5:1 - FSR 0910-6680 KX250 25 249cc STD 78 mm 14:1 - FSR 0910-6958 249cc STD 78 mm 14.5:1 - FSR 0910-6959 KLX400 03 398cc STD 90 mm 12:1 287 Round 0910-5842 434cc +4 mm 94 mm 12:1 303 FSR 0910-5843 KX450F (does not fit 15) 06-14, 16-18 449cc STD 96 mm 12.8:1 272 FSR 0910-5899 449cc STD 96 mm 13.5:1 275 FSR 0910-5900 449cc STD 96 mm 12.8:1 258 FSR 0910-5901 449cc STD 96 mm 13.5:1 264 FSR 0910-5902 KX450 21-23 449cc STD 96 mm 12.5:1 - FSR 0910-6678 449cc STD 96 mm 13.5:1 - FSR 0910-6679 KX450 24 449cc STD 95 mm 13:1 - FSR 0910-6850 449cc STD 95 mm 13.5:1 - FSR 0910-6851 KTM 450 EXC/XC-F/XC-W 12-16, 450 SX-F 13-15 450cc STD 95 mm 13.5:1 259 FSR 0910-5934 450 EXC-F/SX-F/SMR/XC-F/XCF-W 23-25 450cc STD 95 mm 13.5:1 - FSR 0910-6852 450cc STD 95 mm 14:1 - FSR 0910-6853 SUZUKI RM-Z250 10-18 – Pro Series 249cc STD 77 mm 14.2:1 151 FSR 0910-5908 DR-Z400 00-24 398cc STD 90 mm 12:1 287 Round 0910-5842 434cc +4 mm 94 mm 12:1 303 FSR 0910-5843 RM-Z450 13-25 449cc STD 96.0 mm 13.5:1 258 FSR 0910-59291 Pro Series 449cc STD 96.0 mm 13.5:1 258 FSR 0910-69602 449cc STD 96.0 mm 14.5:1 266 FSR 0910-5930 DR650 96-11 650cc STD 100 mm 10.5:1 375 Round 0910-5759 YAMAHA WR/YZ250F 05-13 249cc STD 77 mm 13.5:1 167 FSR 0910-5857 270cc +3 mm 80 mm 13:1 178 FSR 0910-5858 WR250F 15-17,YZ250F 14-18,YZ250FX 15-19 250cc STD 77 mm 13.5:1 149 FSR 0910-5931 Pro Series 2-ring 250cc STD 77 mm 14:1 152 FSR 0910-5932 250cc STD 77 mm 14.5:1 154 FSR 0910-5933 WR250F,YZ250FX 20-24,YZ250F 19-24 250cc STD 77 mm 14:1 142 FSR 0910-6543 250cc STD 77 mm 14.5:1 143 FSR 0910-6544 WR450F 05-15,YZ450F 05-09 478cc +3 mm 98 mm 13:1 288 FSR 0910-5859 WR450F 16-17,YZ450F 14-17, YZ450FX 16-17 - Pro Series 2-ring 450cc STD 97 mm 14:1 268 FSR 0910-5939 YZ450F 23-24 450cc STD 97 mm 14:1 - FSR 0910-6854 XT/TT500 76-81 540cc +3 mm 97 mm 11:1 342 Round 0910-5835 1 Piston volume 0.70 cc. 2 Piston volume 0.77 cc. PISTONS (CONT)
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