well, as I said concession karts like this are meant to withstand some serious abuse
(idiots crashing into curbs, tyre walls and into each other on a daily basis with these things)
So, yes, it's heavier than your every day racing chassis.
But part of it is the layout... it's a rear engine kart;
thus it's slightly longer which I think is a good thing (personal preference
)
and that's the reason for at least 5 additional kilos.
Then, it's a twin rail and those carry likely in the realms of another five to eight kilos...
Frankly... don't chop of anything.. maybe loose the bumpers but don't cut the chassis;
one false move and the chassis (still heavier than a racing chassis) will be less stable than a wooden kids kart;
it's just not worth the risk IYAM.
An 8hp enigne will still propell it nicely;
But ask the seller for the engine mount that came with it.
it'll save you serious headaches and he can't use it anyways on a different chassis.
'sid