MCS, Isolator Rubber. Wheel Pulley RH/RA Models for Harley-Davidson Pan America, Sportster, Nightster

One-piece rubber compensating insulator.
Direct replacement for the OEM rear wheel sprocket balance cup insulator rubber.
OEM replacement part number 42200212.
Note: The insulator is a maintenance product and it is easy to check the clearance to see if it is within factory specifications.
Doing this regularly will allow you to plan a replacement, such as in conjunction with a tire change, for added convenience.

Fits: > 21-24 RH1250 Sportster S; 22-24 RH975 Nightster; 21-24 RA1250 Pan America; 21-24 RA1250S Pan America Special