RFX Pro Series Elite Rear Sprocket Husqvarna 125 610 Up To 2013 Gas Gas EC125 300 All Years Various Sizes Teeth:47 EC250F 21 25 RERS50UL 52 SV EC250F 21 25 Built in handle for easy transportation HUSQVARNA Year Pitch REAR SPROCKET CR 125 91 13 520 FXRS 60 50 CR 250 92 94 520 FXRS 60 48 CR 250 95 98 520 FXRS 60 48 CR 250 00 13 520 FXRS 60 48 CR 250 90 91 520 FXRS 60 50 CR 250 99 520 FXRS 60 50 TC 250 02 08 520 FXRS 60 50 TC 250 09 12 520 FXRS 60 50 TC 449 11 13 520 FXRS 60 53 TC 450 02 08 520 FXRS 60 50 TC 510 02 08 520 FXRS 60 47 TC 570 01 03 520 FXRS 60 52 TC 610 91 00 520 FXRS 60 52 TE 250 02 08 520 FXRS 60 50 TE 250 09 12 520 FXRS 60 50 TE 310 09 12 520 FXRS 60 50 TE 400 01 02 520 FXRS 60 50 TE 449 11 13 520 FXRS 60 50 TE 450 08 11 520 FXRS 60 47 TE 450 02 08 520 FXRS 60 50 TE 510 02 08 520 FXRS 60 50 TE 511 11 13 520 FXRS 60 51 TE 570 02 04 520 FXRS 60 48 TE 610 91 07 520 FXRS 60 48 WR 125 98 13 520 FXRS 60 50 WR 125 90 97 520 FXRS 60 52 WR 250 98 12 520 FXRS 60 48 WR 300 09 13 520 FXRS 60 48 GAS GAS Year Pitch Part Number EC 125 97 98 520 FXRS 60 52 EC 125 99 17 520 FXRS 60 51 EC 200 99 17 520 FXRS 60 51 EC 250 97 01 520 FXRS 60 47 EC 250 02 17 520 FXRS 60 48 EC 300 99 02 520 FXRS 60 47 EC 300 03 17 520 FXRS 60 51 Beta Year Pitch Part Number RR 450 4T 07 09 520 FXRS 60 52 RR 450 4T 10 12 520 FXRS 60 52 RFX Pro Series Elite Rear Sprocket Husqvarna 125 610 Up To 2013 Gas Gas EC125 300 All Years (Red) Various Sizes