thanks, its not street legal, in az. they issue plates even if its not for the street. as far as the tubing going its 1 1/2 " and my thought with you having 1 5/8 is if you order a standard mirror set up you could ream it out a little to open it up to 1 5/8 ? just a idea....the mirror was already on the buggy, but i've seen them on ebay or chircos, there in tucson az.