BOLD MAGENTA part numbers are new for 2025 PARTS-UNLIMITED.COM 2025 | OFFROAD SPROCKETS SPROCKETS 660 JT SPROCKETS •Computer-designed to achieve ultimate strength at minimum weight •JT combines leading-edge technology with top materials to produce the ultimate quality sprocket range with unbeatable value •Every sprocket meets or exceeds the highest possible quality standards set for the motorcycle industry •Sprockets are heat-treated and bead-blasted to reduce material surface tension • Unless noted, front sprockets are made with C45 steel and SCM415 chromoly steel alloy; rear sprockets are made with top-quality-grade C45 high-carbon steel •Aluminum rear sprockets are made with high-strength Austrian 7075-T6 anodized aluminum •JT aluminum sprockets are about 30% lighter than a comparable steel equivalent, which reduces unsprung rotating weight and improves performance •Lightweight front sprockets available for some applications as noted RUBBER CUSHIONED FRONT SPROCKETS “RB” •Used by the major Japanese motorcycle manufacturers since early 1990’s to dampen the chain impact on the teeth of the front sprocket •These same sprockets are now available to the aftermarket • Quality, design and OEM proven technology are the same as what is supplied to the motorcycle manufacturers SELF-CLEANING SPROCKETS “SC” •Manufactured with self-cleaning grooves for added life and performance •Made of stainless steel ALUMINUM REAR SPROCKETS “AL” • Made from aviation-grade 7075-T6 aluminum alloy, optimal lightweight design and CNC machined for performance and lifespan •Manufactured from the best materials with a special self-cleaning design, and hand-finished to perfection • Select aluminum sprockets are available in colored options, see fitment chart NOTE: When installing sprockets which differ from OEM sizes, check for proper clearances before operating. RACELITE ALUMINUM REAR SPROCKETS •JT sprockets is proud to introduce the new RaceLite range of anodized 7075-T6 aluminum sprockets • Available in hard wearing color options, see fitment section for details KEY TO NOTES: AL = Aluminum. LW = Lightweight front. RB = Rubber cushioned. SC= Self-cleaning steel. ST = Steel. BLK = RaceLite black aluminum sprocket. BLU = RaceLite blue aluminum sprocket. GLD = RaceLite gold aluminum sprocket. GR = Twinstar, graphite T6 aluminum center with high carbon steel outer ring. ORG = RaceLite orange aluminum sprocket. RED = RaceLite red aluminum sprocket. FITS MODEL STOCK GEARING STOCK CHAIN FRONT SIZE PART # NOTES REAR SIZE PART # NOTES BETA 250 RR 2T 13-14 13-49 520-114 12 JTF1901-12 38 1210-0630 ST 300 RR 2T 13-14 13-49 520-114 13 1212-0513 SC 39 1210-0631 ST 14 1212-0514 SC 40 1210-0083 ST 15 1212-0837 SC 40 1211-2562 RED 40 1211-2636 BLK 42 1210-1726 ST 42 1211-2563 RED 42 1211-2637 BLK 43 1210-1727 ST 44 1210-0084 ST 44 1211-2564 RED 44 1211-2638 BLK 45 1211-2639 BLK 45 1211-2565 RED 46 JTR210-46 STL 46 1211-2566 RED 46 1211-2640 BLK FITS MODEL STOCK GEARING STOCK CHAIN FRONT SIZE PART # NOTES REAR SIZE PART # NOTES BETA (CONT) 250 RR 2T 13-14 13-49 520-114 12 JTF1901-12 47 1211-2567 BLK 300 RR 2T 13-14 13-49 520-114 13 1212-0513 SC 47 1211-2568 RED (CONT) 14 1212-0514 SC 47 1210-2595 GR 15 1212-0837 SC 48 1211-2569 RED 48 1211-2641 BLK 48 1210-2596 GR 49 1211-2570 RED 49 1211-2642 BLK 50 1211-2571 RED 50 1211-2643 BLK 50 1210-2598 GR 51 1211-2572 RED 51 1211-2644 BLK 52 1211-2573 RED 52 1211-2645 BLK 53 1211-2574 RED 53 1211-2646 BLK Countershaft Steel Sprocket RaceLite black Self-Cleaning RaceLite orange Aluminum Twinstar Rubber Cushioned
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