Redline Cycle Sports is an authorized Vortex Racing Component dealer. 
 

Listed is a EK ORING Chain AND VORTEX sprocket Kit to fit all KTM 
250/300 XC and XCW 
250 SX/SXF/XC-F
350 SX/XC-F
450 SX
IF YOU HAVE SPROCKET TEETH QUESTIONS,  PLEASE MESSAGE US OR REFER TO YOUR OWNERS MANUAL.

THIS KIT LISTED HAS
48 TOOTH ALUMINUM VORTEX REAR SPROCKET-- PART #316ZO-48
13 TOOTH STEEL FRONT VORTEX SPROCKET-- PART # 3224-13
EK 520 SRO6 120 LINK O RING CHAIN WITH CLIP STYLE MASTER LINK PART #520SRO6-120