Just got myself a 1982 honda urban express nu50. Unfortunately she is a little beaten up. Has a strange problem where it will run well for around 5 minutes, then it slows down and you cant get the speed past 10-15. Im thinking the exhaust might be clogged with carbon, as I just got the carb/gas lines cleaned and tuned up. If anyone out there has an exhaust that will fit, pm me and I may make you an offer. If you have any other Nu50 parts let me know, like I said mine is a little beaten up and could use some new pieces.