Hi Today I talked with few guys working in yamaha services. They've told me that I have to set valve clearance a little difrent then the manual says. They said that center intake valve should have 0.2-0.22 not the 0.1-0,15 in 01 yzf 426. They say that the same thing is in yzf 250 any year. They say that that's because the center inatke cam lob is engaged 15 deg ealier.... is this true and good to set this clearance at 0.2?? Another question is? Cam I put 450 cam chain into 426? I know that it is shorter but that's not my problem because I can get tsubaki chains in any lenght. As I found there is only diference in lenght and sidle plate shape. Am I right?