Thread: Jetting 101
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Old 01-12-2006
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Keg Keg is offline
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Join Date: Apr 2002
Location: 2 Stroke Town
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Plug color

When I bike is jetted correctly the porcelin around the electrode will be a nice tan-brown colour. White means too lean, black means too rich.

You may of heard the term plug chop. This simply means you ride the bike in 2nd gear flat out for about 2klms and then hit the kill switch, while keeping the throttle open. When you pull the plug the colour will indicate if the main jet is correct. You can repeat this proceedure at half throttle to give you a bit of a guide about the needle, but it is usually easier to just try a setting and ride it to see if the bike gains response and power.

- iridium plugs are hard too read as they usually have alot of black carbon around the thread end and porcelin no matter how it is jetted. You have to look at the electrode itself closely.
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