What Primus wrote is so true. During 'break in' the valve seats can move closer to the rocker. After the first several thousand miles the material that the seats are pressed into become work hardened and the movement stops. A good fan directed at the cylinder heads for an hour or so will cool the heads enough for an accurate check/adjust. Take your time and remove as much as possible for access. The exhaust access port on the 13s is tiny. Order new '0' rings ahead of time just in case.
Jimbo. 1800c, Drag Bars, Drag Pipes, Chrome Wheels, 31T Ring Gear, BadX Extreme Seat, SOTMC Shocks, 200 Rear Tire, Elimination of all Non-essentials, Kingdom of Kicks.