One MC-21 "SP'' OEM rear shock removed from a 93' SP NSR. I think is same unit for MC-28 NSR?. Shock is in excellent overall condition , (eg) no corrosion or rust etc, and has been recently serviced by a well known Cycle Suspension Service Co , here in CA USA. There is an aftermarket ''gas-filling-cap'' installed as well. Asking $150 or partial trade. I don't know how to upload a picture of it , So If one was to email me, I can send them a picture that way.