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Last time I had the vales done they other dealer had my timing chain off 1 tooth and I had to fix.



You rotated one of the cams yourself? If you can do that, you are more than capable of at least checking the clearances yourself, if not changing shims. Quite often clearances will be within spec the second (24,000 mi) time around. All you need is a feeler gauge. Jack up the rear wheel so you can turn the motor and remove cam cover.