BOLD MAGENTA part numbers are new for 2023 SPROCKETS PARTS-UNLIMITED.COM OFFROAD | 2023 531 SPROCKETS ALUMINUM WORKS TRIPLESTAR REAR SPROCKETS • Sunstar is the largest OEM and aftermarket supplier of motorcycle and ARV sprockets in the manufacturing world for every major Japanese motorcycle builder since 1946 • Constructed of high-quality, aerospace grade 7075 T-6 aluminum • Computer-designed weight reduction holes for the best combination of lightness, strength and stability • Exclusive tooth-valley design provides 50% better chain contact area for the best power transfer possible • Hard anodized coating for added durability and a superb finish • Cleaning grooves added at bottom of tooth area STEEL OEM REPLACEMENT REAR SPROCKETS • Constructed of the highest quality 1045 high-carbon steel • Exclusive heat treatment and quenching process for strength and durability • The strongest, longest lasting steel replacement sprocket available FITS MODEL STOCK GEARING STOCK CHAIN FRONT SIZE PART # REAR SIZE PART # SPROCKET TYPE BETA RR250 05-09 14-52 520- 12 1212-0263 42 2-363142 (Steel) RR250 2T 13-19 13-49 520- 13 35713 43 2-363143 (Steel) RR350 12 13-50 520-114 14 35714 45 1210-0958 (Steel) RR350 13-14 13-49 520- 15 1212-0742 48 1210-0959 (Steel) RR400 05-09 14-52 520-114 RR400 10-12 13-50 520-114 RR400 13-14 13-49 520RR450 05-09 14-52 520-114 RR450 10-12 13-48 520-112 RR450 13-14 13-49 520RR498 12 13-48 520-112 RR498 13-14 13-49 520RR520 10-11 13-48 520-112 RR525 05-09 14-50 520GAS GAS EC125 03-11 13-48 520-112 42 2-363142 (Steel) Enduro 125 00-02 13-52 520-118 43 2-363143 (Steel) EC200 00-02 13-51 520-116 45 1210-0958 (Steel) EC200 03-18 13-48 520-114 48 1210-0959 (Steel) EC250 00 13-47 520-114 EC250 2T 01-18 13-48 520-112 EC250 4T 11-12 13-48 520-114 - EC300 00 13-47 520-114 EC300 01-12 13-48 520-114 EC400 FSE 00 13-48 520-116 SM400 FSE 03-04 13-42 520-112 EC450 FSE 03-10 13-48 520-116 SM450 FSE 03-05 13-42 520-112 FITS MODEL STOCK GEARING STOCK CHAIN FRONT SIZE PART # REAR SIZE PART # SPROCKET TYPE GAS GAS (CONT) EC250F 12 13-50 520- 12 38812 42 2-363142 (Steel) EC250F 13-15 13-48 520- 13 38813 43 2-363143 (Steel) EC300F 13-15 13-48 520- 14 38814 45 1210-0958 (Steel) 48 1210-0959 (Steel) MC125 21 13-48 520-118 48 1210-0357 (Steel) MC250F 21 13-50 520-118 49 1210-0358 (Steel) MC450F 21 13-48 520-118 50 1210-0359 (Steel) 51 1210-0360 (Steel) HONDA XR50R 00-03 14-37 420-78 14 10714 35 1211-0130 (Works/Gold) CRF50F 04-21 14-37 420-78 15 10715 37 1210-0169 (Steel) Z50A Mini Trail 69-71 13-34 420-74 37 2-100337 (Steel) Z50A Mini Trail 72-78 12-37 420-76 Z50R 79-81 12-37 420-76 Z50R 82-87 13-37 420-76 13 10213 37 2-100337 (Steel) Z50RD 86 14 10214 15 10215 Z50R 88-99 14-37 420-76 13 10213 37 2-100837 (Steel) 14 10214 15 10215 ZB50 88 15-37 420-100 13 10213 35 2-102235 (Steel) 14 10214 36 2-102236 (Steel) 15 10215 38 2-102238 (Steel) 44 2-102244 (Steel) 46 2-102246 (Steel) POWERDRIVE COUNTERSHAFT SPROCKETS • Manufactured from case-hardened chromoly steel for unparalleled strength and durability • Parkerizing surface treatment prohibits rust and corrosion, building resistance against those agents, resulting in a longer lasting, better appearance • Most race applications feature drilled weight-reduction holes (depends on application/tooth size) • Constructed of the same great quality and specifications that the Japanese OEMs have trusted and used since 1946 Countershaft Sprockets Steel and Aluminum Rear Sprockets SPROCKETS continued on next page.
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