Are your scales broken?
That's seriously light, less than my road bike! As a rule of thumb race level XC bikes will aim for less than 10kg, but recreational alloy hard tails tend to be in the 10 to 11 kg zone, unless you have deep pockets.
I always raise an eyebrow when I see entry level hard tails with claimed weights around 13kg, but that's what a lot of sub £1k hard tails seem to be these days.
My steel-framed Cotic Soul weighs just short of 11kg with XT groupset, Hope hubs on Stans Arch Ex rims, 2.25 tubeless tyres, carbon bars, foam grips and Reba forks. I could shed perhaps a full kilo with carbon 1x11, carbon wheels and skinny XC tyres, but what would be the point for the riding i do?
An accepted standard for Trail or enduro bikes is 30lb, or just short of 13 kg. the Mojo weighs exactly that, and to buy a bike at that spec would cost the best part of £5k. That however has 140mm rear and 160mm front suspension, wide strong rims with 2.4 inch tyres, and a 500g dropper seat post.
