It is really amazing how small tasks can turn into major pains. I hate the starting model year 76, big giant turn signals, looks like the bike should be ridden by the Elephant Man..... The parts bike is is a 75 so they are normal in size. On first attempt I tried mounting them with the 75 mounting/grounding plates, fit a little loose but went on and worked. Tested them the next day and the left signal came and went, I knew it was a ground issue because pushing the signal stalk closer to plate resulted in a good flash, released it stopped. I tried every thing I could to tighten the metal bracket to the grab bar mount, but nothing would work. The final fix came in using the mounting plates for the big 1976 signals but the bases were larger resulting in the 75 signals not lining up with the mounting holes. After pulling out the drill, dremel tool, assorted bits, chisels, hammers, and just about every screw driver and assorted other tool in my chest, I got the situation rectified. I elongated the mounting holes on the mounting plate and rubber insert where the ground barrel goes through. I ended up using the grinder to remove the mounted tap on the inside of the plate so I could use a longer base mounting screw and nut. I tried to cold chisel the welded tap off but it would not give, the Japanese might have ugly arse welds, but they are strong. I ended up grinding it off after I found my pair of old fireman gloves, it only takes me three or four times touching friction heated metal parts to realize it gets damn hot. Needless to say, after all of that I relaxed and spend a little time cleaning up the rear wiring, it is starting to resemble motorcycle a little more. I am having fun........