Hey guys hows it going? I have a 1998 YZ400 that has been sitting for a while. I decided to freshen everythign up, rebuild the carb, top end, new valves, valve job. Got the carb back on there and put fuel in it and have been pumping the throttle for a while and still am not getting any spray from the accelerator pump. Any ideas? Aside from a bad diaphram. How far is the plunger supposed to move when you open the throttle, it only seems to move a millimeter or two before it bottoms out. Thanks for the help, I really appreciate it.