BOLD MAGENTA part numbers are new for 2026 SPROCKETS PARTS-UNLIMITED.COM OFFROAD | 2026 SPROCKETS 589 SPROCKETS continued on next page. 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 STEEL REAR SPROCKETS •Manufactured from premium-quality C45 high-carbon steel •CNC precision-machined to assure tight tolerances •Machined with lightening holes •Attractive bright zinc-plated finish 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 FITS MODEL CHAIN STANDARD GEARING FRONT SIZE PART # REAR SIZE STEEL PART # ALUMINUM BLACK PART # BLUE PART # ORANGE PART # RED PART # SILVER PART # BETA 250 RR 05-12 520-120 14/52 13 1212-2217 43 - - - - 1211-1645 - 350 RR 11-12 520-120 13/50 14 1212-2218 45 - - - - 1211-1647 - 400/450 RR 05-12 520-120 13/50 15 1212-2219 46 - - 1211-1903 - - - 498 RR 12-13 520-120 13/48 16 1212-2220 47 1210-1733 - - - - - 520 RR 10-14 520-120 13/18 48 1210-1734 1211-1440 - - - 1211-1538 500/525 RR 05-11 520-120 14/50 49 1210-1735 - 1211-1906 - 1211-1651 1211-1539 50 1210-1736 - - - 1211-1652 - 51 1210-1737 1211-1443 1211-1908 - 1211-1653 1211-1541 52 1210-1738 1211-1444 - - 1211-1654 - 250 RR 13-18 520-120 13/49 45 - 1211-1850 - - - - 300/350 RR 13-18 520-120 13/49 46 - - - - 1211-1863 - 390 RR/RS 15-18 520-120 13/49 48 1210-1741 1211-1853 - - 1211-1865 - 400/450 RR 13-18 520-120 13/50 49 1210-1742 1211-1854 - - 1211-1866 - 430 RR/RS 15-18 520-120 13/48 50 1210-1743 1211-1855 - - 1211-1867 - 520 RR 10-14 520-120 13/48 51 1210-1744 1211-1856 - - 1211-1868 - 498 RR 13-18 520-120 13/48 - 52 - - - - 1211-1869 - BMW F 650 (all) 94-07 16-47 47 - 1211-1984 - - - - G 650 GS 11-15 - 1210-2739 1211-1440 1211-1539 1211-1645 1211-1659 1211-1903 1212-2217
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