Corner weighting is NOTORIOUSLY useless in karts..... despite what you hear. However, counting the combined weight WILL work.
For precision, you only need ONE set oif scales for what you say you want to do. First, stand the kart on its end and weight that. Then remove kart and put fully-fitted 'son' on the scales. Then add the two weights together.
However, if yop weant to measure the relative front/rear weights (45:55 or 40:60 being the 'classic' distribution range) then 4 scales are brilliant.
If you WANT to do 'corner weighting', then make sure you move the scales all round the kart measuring the AVERAGE of each corner. Then, for extra safety, rotate the KART so it faces all 4 directions. That will avarage out the discrepencies between the uneven floor and the scales.
If you doubt me about corner weighting, do a little test.... get him in the seat fully kitted up and then note the 'weights'. Then get him to lean JUST his head from front left to rear right and note the HUGE changes in distribution! Then get him to move about like he does when he's racing (leaning in the corners, hunching down, leaning back against the braking forces, RAMMING his foot onto the throttle while desparat6 for an ounce more speed and thus shoving himself BACK into the seat, etc., etc..) and watch the changes in corner weights..... You'll see!
Ian
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