Why for example, does a Hyabusa (260kg curb mass) weigh 88kg more than a GXS-R1000 (172kg curb mass)? Why does a ZX-14 (215 kg dry) weigh 36kg more than a ZX-10R (179 kg dry)? I realize a manufacturer's supersports race models will always be lighter than the supersports tourers. I just would love to see a powewrful sports tourer sub 200kg. Maybe this is too light for long distance touring? I would have thought that a ZX-14 that weighed just a bit more than a ZX-10R or a Hyabusa that weighed just a bit more than a GSX-R1000 would be great. Surely a Busa doesn't have to weigh 260kg. Why don't they make the Busa and ZX-14 lighter? Basically a more comfortable GSX-R1000 or ZX-10R with a broader power spread. Would dropping 30 or 40kg (or 60kg for the Busa) make the "non-race" versions less able tourers? Are they made heavier deliberately to make them more stable, more resistant to wind gusts etc and easier to ride longer distances? Maybe the weight is due to extra components it needs and they can't get any more kg off it? My knowledge on the effects of weight is obviously limited. I just would have thought lighter is better, but I guess there is a limit to this. The Hyabusa weighing 45kg more than the ZX-14 is also surprising. The Busa is a real tank it seems. Suzuki quotes curb mass and Kawasaki the dry weight, maybe this accounts for some of the difference but in any case it is still a big difference.