Well I've told it in past but we all sleeped since then. I've got a 03 America with unico air cleaner snorkl in(don't want the noise). Got Harley short muffler with drilled baffel. But I'm pushing a 200 lb. sidecar. Now something you guys forgot to remind me abot the choke. I had forgot about the choke test. Took her out today and got up 80 MPH and no faster till I pulled the chock 85 MPH. That tells me need a biger main jet. Now if it had run worse would have told me that I had to big of main jet. You all remenber the choke cuttes down on air and increas gas flow, Right? Oh I don't know what need jet I'e got in. I changed back and forth so many time. What or the letter on the older thounder bird or the stock america?Rudy