But Mr. Duke, while the factories have gone nutz on different firing orders, re-mapped ECUs and better phorks & shocks, why oh why do they all still tip the scales at around 500 lbs, soaking wet?
One would think better handling and performance could be gleaned from drastic weight reductions. I'm sure a 400 lb. R1 would handle better, and be faster than a 500 lb R1. Even better a 350 lb. R1.
Maybe they've reached their respective lowest weight beacuse of DOT & EPA rules and regs? If not, that would seem to be the next big leap in performance, i.e. getting the weight down around 400 lbs, wet.
Clue me in here oh wise one...
Good question, Cuddy. First off, tho, let's be accurate and say these literbikes average about 450 lbs, not 500. And that's full of fuel, which adds nearly 30 lbs to a bike's weight. Kudos to Honda for getting the CBR's weight down to 439 lbs with fuel.
Now a little historical perspective. In 1997, Honda's CBR900RR weighed about 455 lbs full of fuel, pretty close to today's average weight of a literbike. So, one might say, that's no progress in 12 years. (Although, a ZX-9R of that era scaled in wet at about 530 lbs.)
But consider that 900RR produced only about 110 hp at the wheel, and this low output in todays terms has major ramifications on weight.
First, the more power a bike has, the more it wants to tie itself into knots under acceleration, so frames and swingarms have to get stronger and, hence, bigger, which means heavier.
Also, consider that the more power an engine has, the greater the amount of cooling capacity is needed. Take a look at a 900RR's radiator, then compare it to a current literbike. You'll see a huge difference. Not only does a big radiator weigh more than a small one, it also carries a lot more coolant - again, more weight.
And then we get to catalyzers and tighter noise restrictions, which dramatically increases the weight of the exhaust system.
The R1 engine has its own issues with weight, as its cases have to be built stronger (and heavier) to withstand the crossplane's unique vibration.
Hope that helps ya!