I regularly hit 90kph+ on a 23c road bike tire, including in the corners.
It's all a matter of application and yes, the technology is there as the tires our team is currently running use a triple compound for less resistance in the centre and better traction on the edges. Some of the guys actually prefer a 20c tire due to less distortion of the sidewall but it isn't as available and rides much much harsher. This is all based on a 17mm wide rim.
http://www.maxxis.com/products/bicycle/product_detail.asp?id=2347Yes it's a bicycle and no wider doesn't mean better. There's only so much that you can plus size anything; cars included, where it starts to get a little retarded.
I'd like to think that the tire engineers and chassis engineers knew what would work in a non-modified application. Jay and Gary's applications use properly upsized wheels so in theory those are also correct, albiet, not what Suzuki initially intended for a 400cc Bandit.
-Randy