Crossfire:
Driver, No Luggage, Full Tank
Front 780
Rear 680
Both 1470

Thats in kilograms. I weigh 185lbs fully dressed. You'll have to figure out the conversions and subtract my weight. If you want to be very precise, you might want to measure the total distance between the centre of the front and rear tires, then measure the distance btwn the centre of the seat to the front tires, and centre of the seat to rear tires and subtract my wieght proportionally from the front and rear axle weights.

Good Luck