So here's a shot of my new plug with recently re-jetted 70cc Athena, stock carb-82 main, stock intake and air filter and Leo Vince exhaust.
When I first installed the kit I ran a clone carb with a main jet drilled to about 85. With the filter in it would crap out past 1/4 throttle. Removing the airfilter it went like a rocket. I wanted to run with the air filter so I went back to the original carb and used an 82 main. It runs great but I'm a little paranoid about running lean.
The plug actually looks a little darker than it appears in this picture. Any thoughts?