Well on the issue of grip and this depends on the chassis as to what measures are appropriate and i can only really comment on the Synergy chassis. rear wheels out lower the chassis, loosen the seat, plastic bumper which most hondas seem to run anyhow, use a longer rear axle than standard, also try the extended hubs and finally use a carbon floor tray and try loosening the bolts on the tray. So loads of things to try and hard to sort on a race weekend if you don't know how each adjustment will effect the kart, so you need to test all the above in the same anal way fusion would do it, hire a good track for the day such as fullbeck or rowrah which dont charge a fortune and test away. You need to understand what works best with what and when the measures are best to try. Also regarding the rubber, when we used to race the tyre pressures we would run depended on what class we were following. For example it was common for there to be two grids of iame cadets odd and evens, if the odds followed a senior class and it would depend on what tyre the senior class were running they would be running a different pressure to the evens who would be following the cadets. You would find the times between the two grids different and it would depend on the track conditions and what senior tyre you were following as to which was fastest. Sometimes it was better to follow the seniors and vie versa. For me if if the kart was gripping up i would push the rear out, run the front standard and lower the chassis and see what happens, if this doesnt work then i would loosen the seat, then change to carbon floor tray and finally loosen the tray. If that doesnt work and assuming your frame is new if not i would change that it might be dead. We did find sometimes that adding front to a loose kart helped when it was really hot but really does depend on the ability of your driver. Keep an eye on the pressure rise for each change. Simple eh/....lol
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