Jamie A said:
90% of engine wear is from people riding or driving there cars when the engine is still cold. I usually let mine warm up for 5 minutes, then you can redline right away. Do you care about your bike?
I think this is a bit of a misnomer. 90% of the engine wear may happen when the bike is cold, but the damage is done whether you're sitting at idle or riding away at low engine speed. Given that, it's probably better to warm it up under some low speed riding because it gets up to temperature much faster.
I mean, I think the whole thing about having to sit around and wait for your engine to warm up came from carburated engines, where you simply CAN'T ride away (well, at least not safely) until the bike is at a certain temperature because of the role temperature plays in throttle response. In modern fuel injected bikes and cars it's usually sufficient to wait half a minute for the oil pressure to build and circulate.
Careful about redlining it too early though. I'm actually not sure about this, but there may be a differential between the temperature of the engine, the oil, and the coolant. I think the bike takes the temperature of the coolant. And supposedly it takes longer for the engine and the oil to warm up, so that's why I like to take it easy for a few K's even after the temperature has stabilized. I dunno, this is what I have heard...doesn't really make sense scientifically though...I can't see the temperature of the engine and the coolant being different...because diffusion (as applied to heat) says that if the coolant is at a certain temperature, then engine must be at least that temperature, because the coolant is heated by the engine. And since oil has a specific heat that is about half that of water (that is, the energy required to raise matter by 1 C), then if the coolant has raised to a certain temperature, then oil would have reached that temperature in half the time.
...oops, sorry, I'm rambling.