About 2.6litres of fuel. Or couple of pints, steak'n'chips and a pudding.Around 2.0 kg. That's a fair bit on this bike.
Yes I am just chain yanking. But at my delicious 85 kg "au naturel" - 9 here or there suddenly becomes rather insignificant.
Helmet/leathers/boots etc - 10Kg? Just jawing.