I own a '99 400ex and am beefing it up a bit. A Wiseco 11:1 piston, HRC cam, and port and polish job on the heads are going in now. It already has a Duncan racing double barrel pipe and K&N filter. Any suggestions on the porting and polishing job? Any other mods to compliment what I have already done?

 

gregsnc.
Did you get larger valves with the head job?
What kind of cam?
Is the piston coated?
What size,And jetted carb?
Thanks.