Hello everybody I'm having a lot of pinging coming from my head. The bike does have a full Yosh kit, but it seems to be worse when I run low octane fuel. (i only do it when i have to...aka mid trail system fill-up). What i am wondering is if running leaded race fuel would be bad for the engine in any way. Can anything happen? I'm assuming the titanium valves would be more tolerant of unleaded...what with holding up to the heat, but would leaded fuel do anything? Thanks!