I'm usually riding my modest gs500 and I don't ride like a nutter but I do enjoy redlining it through the gears from the front of the traffic up to the speed limit, I do this for my own pleasure. Anyway I was tooling around on the gf's almost new Suzuki S40, because it's fun to ride but as it's still on the second leg of its initial break in, I don't redline it and it's not even that type of bike, but I still like to take off as fast as I can while keeping the revs below 5,000 at the moment. If other bikes join me at the front I try to tone down my rocket take off because I don't want them to think that it's anything to do with them. This does get a bit annoying at times because I like to get as far in front of the traffic as I can before I reach the speed limit. Anyway so I'm on the S40 and I join a Harley who is already there, were are in different lanes. Lights change and I rocket off but I tone it down a bit because I can see Harley is really struggling and is going to get a bruised ego and I don't want to embarrass anyone, especially on an S40. However this kept the traffic annoyingly close. At the next set of lights we've both got a straight four lane dual carriageway in front of us and I have decided to just ignore Harley and ride as I normally do as I'll be pulling into Bunnings soon anyway. I can see that he's going to take off quickly and make a lot of noise so I do my normal thing and I can see that he really wants to rocket off faster than me this time and I expect him to as well. But instead although I'm on the lowly S40, it's not till we reach the speed limit and hold my speed is he able to eventually catch me and take off at 20 or 30 k's over the limit. My question is this, is it the stupid modifications that are made to the mufflers on these loud as hell Harleys that make them so crap at accelerating, or are they just so freaking heavy that they have less power to weight than an S40, or are their riders, simply crap? I hasten to add this was not an Electraglide it was a Sportster. Any enlightenment will be appreciated. And no, this is not me being bitter just because I have 2 or 3 Harley's with straight through pipes rocket past my house every morning and afternoon, bursting my ear drums.