Rivera-Primo 3.5" Primary Front Pulley insert, SPLINED  (Harley Belt Drives)

We have not mastered the various pulley inserts from Rivera-Primo, and we know the company used a few different sizes.  But based on our review of the Rivera-Prima web site catalog, we understand this to be the 3.5" insert, which corresponds to the overall diameter. 

We have take a few photos illustration the critical dimensions, so please review them carefully to determine correct sizing and fitment features, given your specific application and pulley size.  But more research may be required.

Excellent threads, splines remain nicely-machined, and the "PRIMO" stamp is clearly present.

• Condition:   Used
• Type:   Splined Motors
• Vintage:    

060623  TS  (OS)