So my son picked up a cm400t a while back and I got tired of looking at it so I decided to work on it. New cylinder, rings, top end gasket set, replacement cam and followers, ground the valves, the regular stuff. However when I pulled the carbs for a rebuild (my rebuild kit had all the wrong jets so I had to reuse the old ones) I found the non-adjustable floats, both of which were way off. 19mm or so instead of the 15.5, and visually way off from parallel to the carb body. Closer examination showed that the fuel seats were unlevel with each other or the carb body. Grabbed an appropriately sized socket and pressed both seats level with the carb body. This set one float exactly perfect, and the other way too high. Crap says I, how am I going to pull the seat back out? Turns out the seat is exactly the right size to run a 6x1.0 tap into. I tapped a few threads into the seat, installed a bolt and used a socket/washer/nut to create a press and pulled the seat back out a half a mm at a time till that float was correct also. Verified that the float height is correct, the fuel needle seats correctly and that free movement still exists and called it good. Now I'm waiting on a new accelerator pump assembly. This thing must have been running crazy lean before.
