05-28-2002, 10:52 PM
After racing a 400EX with just a piston and a cam, I have decided not to bore to the 416. I have decided to just do the piston and the cam as an attempt to keep my motor as dependable and reliable as possible. I was told that the higher the compression the less reliable your motor could be. I think the 11:1 is the best all around compression for my type of riding, lots of fast trail riding and some MX now and then. I just don't know what cam to use now? I want something more aggresive than the XR400, but I still want to stick with stock rocker arms and stock valves and springs. Could anyone recommend a cam for me? Also a website or phone number where I might be able to talk to someone would be great. One more question, does a new cam come with a larger\smaller timing chain sprocket? Also would I still stick with stock valve clearance or would I have to adjust to something else? On another note, I just changed my oil to 20W-50 Semi-synthtic Bel Ray for the summer. The weather is warming up to about 80 and friday it suppose to be 93. What do you guys think of this oil and weight? I was running 10W-40 Semi-synthtic Bel Ray during the winter and spring. Thanks in advance.