What plug to use

Nobody but me using Champion? Since mid 90s after reading an article by Eric Gorr about using N7YC i have used them in all my bikes no matter what brand. Never had a problem with them.
 
I would not use a champion plug in my lawn mower. Seen way to many mutilated head due to their poorly cut threads. Ngk Br8es and change it when you need to pull the motor to do a rod kit or crank bearings. They last for hundreds of hours on the right jetting.
 
I would not use a champion plug in my lawn mower. Seen way to many mutilated head due to their poorly cut threads. Ngk Br8es and change it when you need to pull the motor to do a rod kit or crank bearings. They last for hundreds of hours on the right jetting.

This. Although change every top end(100 hours).
 
Since I was 10 years old I've always used NGK plugs, in motocross, enduro, road racers and road bikes. I trust them and wouldn't use anything else.

Now my EC300 has good carburation I just replace the plug once a year. :)
 
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