[rlonstein]

I haven't heard it about cars but it applies to motorcycles. Generalizing, a maintained bike with good brakes and tires is probably more capable than most riders and faster than public roads so a 1990's or later 400-600cc motorcycle ("slow"?) is more fun whirring the engine and stirring the gearbox than loping along in second gear on a liter-class bike.

[mikestew]

One of the most fun rides I ever had was after swapping my bike for a riding buddy's 250 Ninja for the Friday lunch ride. I flogged that thing like a rented mule trying to keep up with the bigger bikes. Riding that thing close to the 14K redline in every gear. Give the handlebars the slightest nudge, and that <400lb. bike just lays on its side, hammer the throttle at the apex because that tiny engine isn't going to spin the rear tire up.

Try that on a ZX-1X on public roads, and they'll be pulling dental records to identify your body.