I should note that, with many of those things, the number of moving parts went up, and the number of things that could leave you stranded alone in the desert went up. The last thing I need, as one who rides for long distances, is for my engine to suck a reed, get a smashed radiator, leaky hose, or have the power valve rattle itself to death. If you look at a Maico 490 (or similarly simple bike) there are really only a couple of things that could go wrong with the top-end. You have the piston, rings, bearings, and rod. Everything else is just cast aluminum. I'm not saying that'll give you better performance (just 95% performance) but I don't think it's a good trade-off for the kind of riding I do. And my biggest beef with liquid cooling is the simple fact that it's ugly as hell, in my opinion.