nsr250racer wrote:Does anyone know what the part # is for a Penske rear shock for mc21 R ?

As I am looking to replace the stock R shock ~

thanks

Randy

sorry for thread hijack

Try just calling Penske. They will need to know your specifications anyway to set you up with the right valving and spring. I don't think they have a specific part number, only a model number for the type of shock, and there are probably a few of those depending on how much you want to spend.
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