that was my first guess, too much empty air, but then wouldn't we get the same issue on other bigger tanks? I mean, I have e Trophy Truggy with a 125cl, which means that when I run on a quarter of the tank I should get the same issue but it doesn't happen, I also have another car with a 150cl, same as the truggy no problem, th evolution given with etra fuel line between the carburetor and the tank, does not make much sense as for the video I saw they say that it helps since you have more fuel already in the line, but then with the fuel filter I still get more fuel in the line, so I'm blind, and yes, temperature goes higher as soon as the first tank gets empty, which for above tank situations (truggy etc) didn't make sense, I could setup the engine with the second tank so I don't get high temperature and make sure that it is not too lean but again, when on first tank the car runs slow on top speed, now I was thinking to buy a 125cl tank and adapt to see how ti goes but don't know which one