2003 Yamaha YZ 125 "gas fouled spark plug 03" Questions

...how much do i need to ****** the timing, also i am checking for a fouled plug, but i'm pretty sure its not getting gas or its out of time, thanks for any info that can get me in the right

...spark plug when you take it out? All black too rich, a chalky white look is way too lean which is far worse than a rich mixture. I blew up my CR-80 when I was a kid from an improper fuel mixture. You ...

...gas at 50:1 in order for it to stop fowling and have a good mix for my bearings. its still a tad bit off but @ $30 dollars a plug it does good for a long amount of time 1: check for oil/gasoline ...