Dude, you don't realize those champions are costing you horsepower? For gods sake man, don't piss away power.
Ok, I'm bullshitting you. Been using Chamion plugs since 1972 when I got my first dirt bike. I never do a tune up with any other plug than a Champion. NGK read differently. The Autolite race plugs are ok to read.
If you can't make a champion plug run, you probably think a vacuum secondary Holley is a race carb. A piss poor craftsman blames his tools. A piss poor tuner blames his plugs.
