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Originally Posted by ZX-12R  I love how all of your conclusions usually sound something like "I don't understand the benefits therefore there are no benefits." There are lots of places on a bike where you can shed pounds. When you start combining them, it becomes pretty significant (especially rotating masses). |
I am limiting the scope of this conversation to pipes alone.
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Originally Posted by ZX-12R Huh??? Throttle response is not even remotely based on any one property of the engine. You seem to be forgetting intake cams, exhaust cams, porting, jetting/fuel mapping, RPMs, compression, and the like before you even get to the exhaust system. |
True, again the scope of this conversation is pipe alone. We're just taking about the pipes here. It's hard enough talking about just that.
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Originally Posted by ZX-12R Stock exhausts are not designed to get maximum performance from the engine. They are designed to meet noise and emission requirements for the area they will be sold in (lean fuel mapping at certain RPMs too). |
Fuel mapping is another thing altogether. They are related, but then we might as well start talking about ignition and/or valve timing too. I never brought them into the conversation. What I am talking about is the how I understand that a pipe works on a bike and its practical application to street sport riding.
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Originally Posted by ZX-12R Here we go again with the "I don't understand the benefits therefore there are no benefits" mentality. Believe it or not but people ride for all sorts of different reasons and for some the loud scream of a race pipe on an I-4 or the deep "potato-potato" from a V-twin with mini pipes adds to their experience. By your reasoning no one should own an SV-650 because a Ninja 250 costs less, burns less fuel, and can still exceed the speed limit on any road in the USA. |
Wow, that's awesome, I wish I had thought of it.
But seriously, I am mostly talking about what I think of as conventional sport riding as I have seen it done. This meaning 100-200% of the posted speed limit on two lane numbered state routes. I am also not talking about high straightaway terminal velocities here.
I think there's some convention to this, it's how I have seen people ride. If you want to go 110 on public roads that's something else entirely. But in fast out of the pocket riding on curvy roads I don't think people are using peak torque and I don't think they are demanding the maximum rate of change in RPM (throttle response). Given that this is really what a pipe effects I still think that, aside from weight, the best indication you could use a pipe is riding at WOT, something you'd likely do on a Ninja 250 on public roads and still be kind of responsible.