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Yammy125
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Yammy125 Newbie

Yammy125

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Posted

Why is my spark plug black and carbon? Mechanic recommend me to do top overhaul. Can i just adjust the mixture setting to become leaner instead?

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JJBuBBle Newbie

JJBuBBle

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Posted
13 hours ago, Yammy125 said:

Why is my spark plug black and carbon? Mechanic recommend me to do top overhaul. Can i just adjust the mixture setting to become leaner instead?

Any photo of your plug? Having a brown carbon burned, black but not sooted on the electrode and thread is fine. Insulator nose turning carbon brown is fine too as its in the burning. (some may look as black, so photo of plug will be great). 
The main factor can be your fuel grade, what fuel grade are you using?
Are you using the correct Spark Plug Number? The number play a part from cold to hot plug.
Plug gap may also contribute but ... kind of hard to suggest.

  • 1 month later...
adesmond2 Mentor

adesmond2

Posted
Posted
On 12/25/2020 at 9:17 AM, Yammy125 said:

Why is my spark plug black and carbon? Mechanic recommend me to do top overhaul. Can i just adjust the mixture setting to become leaner instead?

what bike? :) 

Kindly read thru at least the intro section first before decide to post any comments.... thanks... :cool:

 

Please proceed to this website/web link if you guys have any technical issues on Kawasaki Kips/KR150, I'll update the 1st POST as and when there's a new question. Newbies questions on the top as well. :)

 

 

 

http://www.singaporebikes.com/forums/showthread.php?p=6285055#post6285055

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