Hi All, I've been working on a carb rebuild, on my '84 VF500F US model, and thought I would post my findings. The main jets are sized front to back (#102F/#105R) as is often posted. What is interesting to note, on the set I have, is the 'criss-cross' pattern of the needle jets and the emulsion tubes. This does not match FSM... Cylinder numbering: Close up of the No. 1 and No. 4 main jet emulsion tube: Close up of the No. 2 and No. 3 main jet emulsion tube: I am not sure why this set is like this but I have seen previous posts regarding the 'criss-cross' set-up - i.e that the jet needles and main jet emulsion tubes are not paired front to back - rather - they are paired from the two 'middle' throttle bodies to the two 'outside' throttle bodies. I would be curious to see what other owners have found for the '84 as well as the other years. Thx!