i have switched the champion plug in my zenoah to an ngk but i have no idea why.could someone enlighten me?

Hello,
The Champion plugs have a problem with the porcelain around the electrode cracking and falling into the engine after they have been in a engine that has been dunked and taken in water. The NGK plugs have shown to be more tolerant to this type of environment.

The NGK iridium plugs may also be good for a slight power increase. It's hard to see, and won't give a noticeable speed increase, but the average of several recent dyno runs comparing plugs shows it.

Lohring Miller

I agree NGK plugs make more power on dyno.Not a huge gain but every little bit helps!

I'll be changeing my champion out for a ngk even though it's not in the water yet!!

Thanx all!