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Effects of different plugs in 125?

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Half academic curiosity, half troubleshooting here...

'03 YZ is speced with a BR9EG. How would performance be affected by running a BR8EG?

If anybody knows, please be specific (i.e. low end bog, flat on top, etc...not just "it would run funny"). Thanks.

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True.

Run the br9eix and forget about plugs for quite awhile. Great performance + lasts a really long time.

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The only thing that the BR8 will do is possibly burn a whole in your piston.

Always use the recomended plug.

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the br8eg will be fine. i have a 2005 yz125 and i ran the br8eg in the 90s and the bike ripped harder then it ever has.

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