??????? You have a 140 but w/ a 155 u get more low end? I'm confusedI just put my HMF on tonight. No lid, snorkel lid off, and my main jet is a 140. I'm at 4500ft PERFECT!! Try a 155.....Nice gains on low end. To loud on the street to see the mid and top end....[/b]
The only problem with that is u don't know if ur jetting is right. U should at least try going up a size on the main and make sure it skips. Also do some plug readings when ur done.