Is a 10 years old chassis as competitive as a brand new one?

Yes, it is true! Of course, the chassis are designed to be best used with the type of tires needed when the homologation takes place, but I am sure that if we put on the track a chassis from ten years ago, we could obtain performance very similar to that of the new homologated chassis.
After all, if we look at the designs of  current frames, we can easily notice that there are not many large differences in comparison to those of the past. Therefore, I see no reason why we cannot assume a similar competition between present and past models.

There are those who think that with the KZ it is sufficient to do a few laps on the track at low speed, but this is wrong, it is always important to warm up the kart on the trolley, both in the summer and especially in the winter months.
The 2T engines that are higher performance, have minimum mechanical tolerances, but the use of the engine with not an optimal temperature, even for a short period of time, can adversely influence the life span of the components. Naturally, in the summer the warm-up time might be shorter than when temperatures are much colder. The general advice, however, remains that of entering the track with the water temperature of about 50 °C.