This kit is complete with everything you need.
 

Kit includes: 

• one Chromoly Steel Countershaft Sprocket
   
• one Hardened Steel Rear Sprocket
   
• one RK 520XSO Series X'ring Chain (cut to correct length)
   
• one Clip Style Master Link. 
   

Use the dropdowns to select the gearing you want. Some sprocket sizes will require the use of MX BOLT kit for mounting.