I am planning on rebuilding my 98 YZ400 soon and was just wondering if anybody had suggestions on what to look for or any insight to what else I might need to do. I have only had it for about 7 or 8 months and it runs great except it has overheated the last few times out and it uses a lot of oil. I plan on putting a new piston in it, new clutch, carb rebuild & valve job. Anything else I should do? I also was thinking about putting a crankcase filter on the breather tube that just vents out, has anyone ever done this?