Thanks for your reply. Well, the carbs were rebuilt, according to the seller. It had been sitting around for 10 years when he got it and had a bunch of stuff done to it. The bike seems to run OK as is, what exactly is this supposed to do, and if the bike runs rough with it on, what is the point of it? I'm a bit at a loss on that. Is it supposed to straighten itself out as you go along? Thanks again for your reply.