09-09-2015, 03:59 AM
I just turned 14k miles and am planning at 15k new plugs and the first valve adjust. Bike's running great and getting a shade under 50mpg. If the valves weren't closing all the way, it would be obvious by the way the engine ran and wouldn't take long for them to burn. If they were so tight that there was zero gap then the potential would be there.
