I'm buying a Harley in September. A Sport Guide is looking favourite at the moment. I've ridden it against Street Bobs, a Fat Boy and a Breakout and IMO it's by a country mile Harley's most agile, versatile and all round useful bike. My only nagging doubt is that it only comes with the 107 engine. I quite like the Heritage Classic because it has the 114 but am I talking myself into a heavier and less sharp bike just for the sake of a few cubes that won't make much difference? I've been trying to find out on Harley forums what the crack is with tuning kits for 107 SG's but they haven't been much help. Those who've got a 114 model say no amount of tuning, even a stage 4 will turn a 107 into a 114 and a 114 is just better. They would say that.. The dealer said buy the stage 2 kit with the cams and a good exhaust for the 107 and you won't tell the difference. And they would say that as well. And I'm baffled () by the exhaust options. There aren't nearly as many aftermarket systems (or aftermarket anything) for Sport Glides and I can't work out which is best. I'm assuming a 2 into 1 offers the best performance, which I want, but I don't want stupid loud and I see that a lot of pipes for Harleys are painted mild steel which I can see turning orange in pretty short order in cold and damp UK. I'm thinking Vance and Hines pro pipe but it looks very loud. Any tips for a newbie?