I've only used the twin plug H80 but the carb setup is the same as the H60. A couple of neat points about it is that if you invert the engine then you can uninvert (is there such a word?? ) the carb by undoing the 2 screws and turning it 180 degrees so it points upwards. Much easier than having to try to lower the tank. The drum valve inside has 2 slots in it to get the drive from the crankpin. One slot has an R marked on it for reverse rotation. Mine runs perfectly on true FAI fuel (20% castor) and gives one flick starts. A very nice engine for its age.