Ive got a 01 400ex with works shocks and holeshots tires. Im really getting bored with the power of my ex. I am thinking about getting a big bore kit and reliability is as important as power to me. Who makes the 425 kit and does it put out as much power as the 440? If I get a 440 kit, cam, rockers and an aftermarket connecting rod, will it be reliable? How much is the complete 440 kit and can I just get an aftermarket clutch basket to fix the clutch problem? Will just stiffer clutch springs work? Do I need clutch mods with a 416 kit and how does its power compare to the 440? Thanks!

P.S. Should I just sell the whole bike and get a used cannibal?