You and me both. I am curious how much my HP4 weighs after stripping it down to be a track bike...
had some pics of a frame with parts of it cut out to reduce weight. Not saying that's how this bike achieved weight loss. I'll see if I can find it.
I guess titanium, lighter uppers, 520 conversion, and lighter wheels will drop some weight.
1. All street-related, stock components were removed: all stock lights, fairings and controls, ABS pump, ignition, stock harness, radiator fan and shroud, kickstand, some brackets holding this stuff.
2. Lighter components installed: ultralite racing fairings, magnesium wheels, 520 chain, Ballistix lithium battery, aluminum sprocket, upper triple tree, rearsets, full titanium exhaust, Brembo brake master cylinder, clip-ons, etc.
3. I am not sure about weight differences: STM clutch, billet camshafts, Ohlins suspension, linkage, pivots.
4. The bike works out regularly staying lean
Hope that helps you with your weight reduction agenda.