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Hi there all, I don't know what sort of response I will get to this question, but I have Rodney's twin here, plus another I have been building. It has had carb issues from the start and I'm not sure Neal's is 100 % right either. It appears to me that the float level for the horizontal mounted carb needs to be to the center of the bowl banjo bolt, the carb body is then tilted slightly down at the bowl end so the main jet is always covered in fuel. I know the inlet port at the bottom of the jet block is in a different position to compensate for the orientation of the carb body, but this is only for the idle and part throttle fuel supply. I think one issue here to is that the original twins basically had 276 carb's whereas Neal and Rodney have new 289 Shadow type carbs on........You might think, well big deal, that should not matter too much.........Only thing is that because these carbs are quite a bit larger than the 276, there is far less room to move (rotate) the carb without the banjo bolt hitting the rear cylinder exhaust valve spring. Also for those who know a bit about these early Amal carb's, the lower brass cap that holds the jet block into the body come in different heights, at least three that i have here, but I'm not sure for the 289's. Can someone who knows give me some idea as to float heights for these front (Horizontal mount) carbs............Even checking the fuel height is quite difficult because the usual clear hose and "water level" procedure as per the post war bikes does not work on these carb/float combinations. Many thanks and cheers for now.....................Greg.