2021 Parts Unlimited Offroad

SPROCKETS parts-unlimited.com 2021 PARTS UNLIMITED OFFROAD BOLD MAGENTA part numbers are new for 2021 476 SPROCKETS ALUMINUM REAR SPROCKETS • The 7075 T651 aluminum we use for these sprockets receives an extra tempering which reduces distortion and provides optimal thickness vs. typically thinner 7075 T6 sprockets • 100% machined, no stamping or grinding • Optimal tooth thickness results in maximum tooth and chain contact • We leave the “cleaning” grooves out of our sprockets, because more aluminum contacting your chain means longer chain and sprocket life • Moose Racing rear sprockets come anodized in black; select Moose Racing rear sprockets are available in blue, orange, and red • See price list on page 485 • Made in the U.S.A. CHROMOLY STEEL FRONT SPROCKETS • Machined from impact and wear resistant chromoly steel • Inner splines are broached to provide maximum spline-to-countershaft contact – this helps distribute driveline forces over the largest possible area • Heat-treated, then finished with a nickel coating for corrosion resistance and lubricity • BE SURE TO CHECK FOR CLEARANCE WHEN ORDERING SIZES LARGER THAN STOCK • See price list on page 485 • Made in the U.S.A. 1 Red. 4 PART #M603-21-12 may require lock plate modification. FITS MODEL CHAIN STANDARD GEARING FRONT SIZE PART # REAR SIZE PART # BETA 250RR 2T 13-18 520-120 13/49 12 M602-66-12 45 M601-14-45 300 RR 2T 13-18 520-120 13/49 13 M602-66-13 45 1211-0648 1 350 RR 13-18 520-120 13/50 14 M602-66-14 46 M601-14-46 390 RR 15-18 520-120 13/49 15 M602-66-15 46 1211-0649 1 430 RR 15-18 520-120 13/48 47 M601-14-47 480 RR 15-18 520-120 13/48 47 1211-0650 1 48 M601-14-48 48 1211-0651 1 49 M601-14-49 49 1211-0652 1 50 M601-14-50 50 1211-0653 1 51 M601-14-51 51 1211-0654 1 52 M601-14-52 52 1211-0655 1 53 M601-14-53 53 1211-0656 1 54 M601-14-54 54 1211-0657 1 HONDA MB 5 82 420-106 13/43 12 M603-21-12 4 - - MR50 74-75 420-92 - 13 M603-21-13 Z50A 69-71 420-74 13/34 14 M603-21-14 Z50A 72-78 420-76 12/37 15 M603-21-15 Z50R 79-81 420-76 12/37 Z50R 82-87 420-76 13/37 Z50R 88-99 420-76 14/37 ZB50 88 420-100 15/39 CRF/​XR50R 00-16 420-78 14/37 14 M603-25-14 35 1211-0003 15 M603-25-15 37 M630-61-37 39 1211-0004 CR60R 83-84 420-104 14/45 12 M603-21-12 4 36 M630-23-36 13 M603-21-13 46 M630-23-46 14 M603-21-14 15 M603-21-15 CL70 69-70 420-102 13/47 12 M603-21-12 4 - - CL70 71-72 420-102 13/49 13 M603-21-13 C70 72-83 420-96 14/36 14 M603-21-14 CT70 3-Speed 69-94 420-88 15 M603-21-15 CT/​SL70 71-72 420-96 XL70 74-76 420-96 13/44 12 M603-21-12 4 - - 13 M603-21-13 14 M603-21-14 15 M603-21-15 FITS MODEL CHAIN STANDARD GEARING FRONT SIZE PART # REAR SIZE PART # HONDA (CONT) XR70R 97-99 420-86 15/36 12 M603-21-12 4 36 M630-23-36 13 M603-21-13 46 M630-23-46 14 M603-21-14 15 M603-21-15 CRF/​XR70R 00-12 420-86 15/36 14 M603-25-14 36 M630-23-36 15 M603-25-15 46 M630-23-46 XL75 77-79 420-94 14/36 12 M603-21-12 4 - - XR75 73-76 420-100 14/44 13 M603-21-13 XR75 77-78 420-100 14/46 14 M603-21-14 15 M603-21-15 XL80S 80-86 420-96 15/37 12 M603-21-12 4 - - XR80 79-84 420-100 14/46 13 M603-21-13 14 M603-21-14 15 M603-21-15 CRF/​XR80R 85-13 420-110 14/46 12 M603-21-12 4 36 M630-23-36 13 M603-21-13 46 M630-23-46 14 M603-21-14 15 M603-21-15 CR80R 80 420-108 14/47 12 M603-21-12 4 - - CR80R 81-83 420-112 14/47 13 M603-21-13 14 M603-21-14 15 M603-21-15 CR80R 84 420-114 14/49 12 M603-21-12 4 36 M630-23-36 13 M603-21-13 46 M630-23-46 14 M603-21-14 15 M603-21-15 CR80R 85 420-114 15/49 12 M603-21-12 4 49 M630-25-49 13 M603-21-13 49 1211-0660 1 14 M603-21-14 50 M630-25-50 15 M603-21-15 50 1211-0661 1 51 1211-0662 1 52 1211-0663 1 55 1211-0666 1 56 1211-0150 56 1211-0667 1 CR80R 86-95 420-114 15/49 14 M603-25-14 49 M630-25-49 CR80R 96-02 420-116 15/49 15 M603-25-15 49 1211-0660 1 CR85R 03-04 420-116 15/50 50 M630-25-50 CR85R 05-07 420-116 15/49 50 1211-0661 1 CR85RB EXP 03-04 420-116 15/56 51 1211-0662 1 CR85RB EXP 05-07 420-116 15/55 52 1211-0663 1 55 1211-0666 1 56 1211-0150 56 1211-0667 1 XL100S 79-80 428-118 15/45 13 M603-31-13 - - XL100S 81-83 428-108 15/42 14 M603-31-14 15 M603-31-15