[HOW TO: Check the condition of you sparkplug] - ATV Riders Forums - Honda, Yamaha, Suzuki, Kawasaki, Polaris, CanAm, Arctic Cat, Kymco ATVs

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HOW TO: Check the condition of you sparkplug
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Posted by: Kaleigh

here are some pics I found on sparkplugs.. I hope it is usefull... if it is hard to read. sorry. just ask me and I will let you know what it says.. or if you would like me to send you the pic..

Posted by: Kaleigh

^_^

Posted by: prowler029

lick it if it shocks tha hell out of u its good!! lol idk

Posted by: GPracer2500

Those types of charts are mostly for commercial mechanics who use plugs to figure out why a tractor or something isn't running. They are of little to no use to performance engine enthusiasts who are trying to figure out if they need a 160 or 170 main jet (or whatever).

It's not bad information, it's just not particularly applicable for tuning our ATV engines. See my last post in THIS THREAD.

Posted by: Kaleigh

yea.. but its a good place to start.. i would never just go by the plug alone.. but does help to keep you in the close range of the right jet size..

Posted by: SamC

i believe thats more for cars because if your plug is light brown that means your running to peak performance on a 2 stroke engine.

Posted by: honda6490

quote:
Originally posted by SamC
i believe thats more for cars because if your plug is light brown that means your running to peak performance on a 2 stroke engine.

Yea most of us run 4 strokers not 2's though.