http://www.cascadeinnovations.net/ rockymountainatv.com just for the love of god stay away from ebay. if ya need help finding anything call a sponsor most of them have good price and a good stock of parts
so its a 40 mm carb the metering rod is the needle on the slide pull it out and should have some digits stamped in it. if ya want more power stock pipes werent the way to go.