NOS drive belt for the 81/82 ONLY, Honda Express SR. Out of production belt, you will not see it new on Ebay, you will not find it new ANYWHERE more then likely. No belt maker makes this odd ball size. The company that made it does not make them, Honda does not carry them, http://www.cmsnl.com does not carry them (great resource for old Jap bikes of all types including the Express) I know I looked for 3 years for a belt and sumbled across some dude by chance on the net that had 3. I burned one up on a bad rusty pully, fixed that, using second one now. 3rd one I have is for sale.
Email me at email@example.com if you want what is probably the last of a few out there to restore your Honda Express SR NX50