BOLD MAGENTA part numbers are new for 2025 PARTS-UNLIMITED.COM 2025 | ATV/UTV PISTON & PISTON KITS PISTON & PISTON KITS 1080 PISTON KITS (CONT) FITS MODEL DISPLACEMENT BORE OVERSIZE COMPRESSION RATIO WEIGHT (GRAMS) SKIRT PART # HONDA (CONT) TRX450R 04-05 449cc 94 mm STD 13:1 317 FSR 0910-5846 449cc 94 mm STD 12:1 300 FSR 0910-5876 449cc 94 mm STD 11.5:1 311 FSR 0910-5847 TRX450R 04-05 Pro Series 3-ring 449cc 94 mm STD 12.5:1 279 FSR 0910-5891 449cc 94 mm STD 13:1 290 FSR 0910-5892 449cc 94 mm STD 13.8:1 297 FSR 0910-5893 TRX450R 04-05 Pro Series 2-ring 449cc 94 mm STD 12.5:1 269 FSR 0910-5869 449cc 94 mm STD 13.8:1 279 FSR 0910-5870 TRX450R 06-14 449cc 96 mm STD 12.8:1 291 FSR 0910-5854 449cc 96 mm STD 13.5:1 295 FSR 0910-5855 487cc 100 mm +4 mm 13:1 312 FSR 0910-5856 TRX450R 06-14 Pro Series 3-ring 449cc 96 mm STD 12.8:1 274 FSR 0910-5880 449cc 96 mm STD 13.5:1 276 FSR 0910-5881 477cc 99 mm +3 mm 13.5:1 294 FSR 0910-5941 TRX450R 06-14 Pro Series 2-ring 449cc 96 mm STD 12.8:1 254 FSR 0910-5874 449cc 96 mm STD 13.5:1 260 FSR 0910-5875 KAWASAKI KFX400 03-06 398cc 90 mm STD 12:1 287 Round 0910-5842 434cc 94 mm +4 mm 12:1 303 FSR 0910-5843 KFX450 08-14 – Pro Series 3-ring 449cc 96 mm STD 12.8:1 284 FSR 0910-5894 KRF750 Teryx 11, KVF750 Brute Force 05-11 749cc 85 mm STD 11.5:1 254 Round 0910-5882 840cc 90 mm +5 mm 11.5:1 297 Round 0910-5883 POLARIS Predator 500 03-07 560cc 105 mm +5.8 mm 12.5:1 399 FSR 0910-5851 RZR 800 07-14, RZR S 800 09-14, Sportsman 800 05-12 760cc 80 mm STD 10.75:1 231 Round 0910-5889 SUZUKI LT-Z400 03-17 398cc 90 mm STD 12:1 287 Round 0910-5842 434cc 94 mm +4 mm 12:1 303 FSR 0910-5843 LT-R450 06-09 450cc 95.5 mm STD 13.5:1 299 FSR 0910-5863 450cc 95.5 mm STD 12.8:1 297 FSR 0910-5864 474cc 98 mm +2.5 mm 12.8:1 311 FSR 0910-5865 474cc 98 mm +2.5 mm 13.9:1 317 FSR 0910-5866 LT-R450 06-09 – Pro Series 2-ring 493cc 100 mm +4.5 mm 13.5:1 297 FSR 0910-5909 YAMAHA YFM250 Raptor 08-11 249cc 74 mm STD 12:1 192 FSR 0910-5884 YFM350 Warrior 87-04, YFM350 Raptor 05-13, YFM350 Grizzly 07-14 366cc 85 mm +2 mm 12:1 289 Round 0910-5845 366cc 85 mm +2 mm 10.5:1 279 Round 0910-5849 YFZ450 04-05 439cc 95 mm STD 13.5:1 282 FSR 0910-5848 470cc 98 mm +3 mm 13.0:1 310 FSR 0910-5850 YFZ450 06-13, YFZ450R 09-20 449cc 95 mm STD 12.5:1 293 FSR 0910-5862 449cc 95 mm STD 13.5:1 299 FSR 0910-5861 480cc 98 mm +3 mm 13.0:1 316 FSR 0910-5860 YFZ450 06-12, YFZ450R 09-20 Pro Series 2-ring 449cc 95 mm STD 13.5:1 250 FSR 0910-5871 YFZ450 06-12, YFZ450R 09-20 Pro Series 3-ring 449cc 95 mm STD 12.5:1 266 FSR 0910-5895 449cc 95 mm STD 13.5:1 260 FSR 0910-5885 478cc 98 mm +3 mm 13.5:1 287 FSR 0910-5940 YFM660 Girzzly 02-07, YFM660R Raptor 01-05, YXR660 Rhino 06-07 – Pro Series 673cc 102 mm +2 mm 10.0:1 380 FSR 0910-5867 686cc 102 mm +2 mm 11.0:1 382 FSR 0910-5868 YFM660 Grizzly 02-07, YFM660R Raptor 01-05, YXR66 Rhino 660 06-07 – Pro Series (4 mm Stroker piston) 719cc 102 mm +2 mm 11.0:1 353 FSR 0910-5877 YFM700 Grizzly 07-13, YFM700 Raptor 06-14, YXR70 Rhino 700 08-14 686cc 102 mm STD 11.0:1 336 FSR 0910-5910 686cc 102 mm STD 12.5:1 358 FSR 0910-5911 735cc 105.5 mm +3.5 mm 10.0:1 346 FSR 0910-5896 735cc 105.5 mm +3.5 mm 11.0:1 366 FSR 0910-5897 735cc 105.5 mm +3.5 mm 12.5:1 385 FSR 0910-5898 YXZ1000 16-20 998cc 80 mm STD 9.5:1 - FSR 0910-5946 998cc 80 mm STD 11.5:1 - FSR 0910-5947
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