It's good in a lot of ways isn't it? I've been able to race at 146 or 152 this year, having finally lost enough weight to need lead on the kart when unrestricted. But quite a few of the lighter drivers I know have had to run at 146 because they don't weigh in at over 68 kg. The general consensus seems to be that running 152 is quicker than 146 with the blue restrictor, but I reckon if you change the gearing appropriately when changing to 146 there is no real difference in lap times. I've back-to-back tested at both weights, and the extra acceleration you'd expect to gain from running lighter gets negated by having to drop a tooth on the back sprocket to get straight line speed.
The TKM restrictors do seem to have been pretty carefully worked out to ensure a level playing field - so I'll be surprised if running at 132 turns out to be any great advantage or disadvantage.
Going back to your original question, yes, drivers weighing 60 kg will need 8 kg more on the kart than drivers weighing 68 kg. But I find it really hard to see why this should be a problem - they still have the option of running at 146 kg with a restrictor if they can't find anywhere else to bolt lead on the kart.
I am regularly weighed to check I am over 68 kg after races, so it's definitely properly checked at ChKRC meetings. Never had a problem with that one yet, but I've been excluded for being underweight with the kart a few times this year (in consecutive heats once, which was embarrassing to say the least...)
Liam
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TKM Weight changes 2014 by 'Tkm Racer' (03 Nov 2013 @ 15:20)
