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1997 Suzuki King quad 300, Does yours get this hot?


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Hey guys,

Could anyone with a king quad 300 verify whether or not the exhaust header pipe becoming cherry red 1" to 2" from the cylinder is normal while holding mid throttle position? :skeptic: Temperature will drop and redness disipates upon returning to idle for about 1 min.

-Only noticable at night

-Cleaned all vent tubes

-carb is rebuilt, set to factory except the needle is raised one position(lowered the eclip on slot), needle adjustment resolved missing and popping

-pump is good

-no vac leaks

-Sprayed carb cleaner around everything, no stumble

Thanks Everyone! Great Forum! Great People!


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Welcome to the site. What year is your Kingquad? We would like to add it to the title.

Anyway, mid throttle is going to be the area most affected by a needle adjusment, and since you went richer, I think you are probably ok as long as every thing is stock. I know my friends TRX 450R gets a little red in the head pipe after a hard ride. It is normal for some machines I guess. I would keep an eye on the plug, to make sure your fuel mix is ok. Does this happen when you are riding, or sitting still and holding the throttle open? if you are just sitting still while you hold the throttle at mid-range, there will be no breeze blowing over the motor as there would be when you are actually riding.

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Thanks Josh, its a 97 King Quad.

The red occurs both sitting still under light to mid throttle, and riding(20-30mph max speed). I shut my garage doors allowing lighting to become dim enough to watch the glow develop, thats when it sits still.

-Red can only be seen at night, not hot enough to glow in the daylight.

-Allowing the motor to idle cools the exhaust and the red dissipates.

-Everything is factory.

-Lots of power starts easy

I will check the plug and google plug chop as listed in a previous thread. Would you advise richening the mixture via a/f screw?



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The fuel screw is really only going to affect idle and just off idle performance. Mid throttle mixture is mostly affected by needle taper and position. I think you are fine, as long as the machine runs ok, I would leave it be and check the plug from time to time just to see how it is doing.

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