Join Date: Oct 2007
Location: Sydney, Australia
It does sound like a lot, but ... In around '87, Performance Bikes did a test using a GPX750 motor, and measuring the parasitic losses from various components. I'm far too lazy to try and find it, but if memory serves, the water pump sucked up about 3% of total power.
That said, it was over 25 years ago, and I'd imagine that water pump seal technology has moved on since then. Worth a try though, I reckon.
Do not walk behind me, for I may not be leading.
Do not walk in front of me, for I may not follow.
Do not walk alongside me, for the path may be narrow.
Just piss off and leave me alone.