I’ve run the Jr plastic tank and the aluminum 2qt. and I use about 1-1/2 pints with a KT100. I fill 3/4 full and have enough at the end so I don’t starve for fuel. Best thing is you don’t have allot of fuel left over after the races and the plastic tank is easy to take off and clean.
FAA certified jet engine and aircraft technician,
Nicholson Speedway class champion 2001,
Yamaha KT100 Service Center,
41 years karting experience