I have a 2005 WR450 and it is making this noise that I can't figure out where it is coming from. When I am at low rpm and give it gas there is a clanking noise. It doesn't make that noise at higher RPM. I don't think it is the steering head because I would notice the shaking. I tightened the chain thinking it may be chain slap but that wasn't it. The bike runs great and has less than 300 miles on it so I don't think it is from the motor. Anyone else have this problem?