I use the pack that comes pre-measured and I squeeze it all out with a roller so I know it is exactly 100-1 gal, mine does 25 with the 44tooth sprocket and I have now ridden it from Corvallis Oregon to Salem Oregon and a lot of that was full throttle so I am hooked on the amsoil saber oh and my bike is heavy with panniers and I weigh in at 320 so again I am fully hooked, Nice rat rod and I too could not ride it, but nice