Run it a while. You'll get some black streaking on the chrome at the point of the leak if it's n the header/silencer joint or cross-over - At least I did. You may want to re-torque while hot, as well. Sometimes the heat will expand the bolts to the point they are loose. Sometimes that is exaggerated when dissimilar metals are concerned. I emphasize ’re-torque' you don't want to pull the threads out of your head or stretch any threads. That will complicate your riding time a whole lot more than the leak.
