I have a 77 620 and I did a 79 disk brake convertion! My problem is that I already bleed the system 4 times and it stop but the pedal goes almost to the floor it's not suposta be that low can it be that much air in the line that I gotta bleed until the pedal right!?
i think there the 38mm there smaller than the ones i have on my L20 but not sure they work good i just never got them to idle but long story shorth i had a bad distributor so it wasnt even the carbs it was my timing all the time!!
i have SU carbs they work i just never can get them to idle right! i would post pictures but i dont know how asking $275 polish monifold and top bowl!pm me for more info thanks!!