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Scooters - 125 to 300 => Downtown 300 => Topic started by: Yoni159 on January 26, 2020, 05:12:53 PM

Title: Does the spark plug seems ok?
Post by: Yoni159 on January 26, 2020, 05:12:53 PM

Does the spark plug seems ok? Does it seem overheated? Or burned? The spark plug have only 7000km.
https://imgur.com/hjKf7Rb

Title: Re: Does the spark plug seems ok?
Post by: john grinsel on January 26, 2020, 06:06:37 PM

It says to me bike is not ridden hard enough and Never Seize was not used on the threads. Check gap and re-use.

Title: Re: Does the spark plug seems ok?
Post by: Stig / Major Tom on January 26, 2020, 07:30:44 PM

Or, on your $6000 scooter - pop a new one in for $7.
Per NGK:
"NGK sparkplugs have a trivalent plating. The finish on the threads is designed to provide corrosion resistance and also acts as a release agent during spark plug removal. NGK spark plugs are installed at the factory dry, without the use of anti-seize.
Anti-seize alters the torques values up to 20% and can lead to over-tightening a spark plug."

Stig

Title: Re: Does the spark plug seems ok?
Post by: Yoni159 on January 26, 2020, 08:59:39 PM

I dont need new one . I only want to know if my engine works fine .

Title: Re: Does the spark plug seems ok?
Post by: Stig / Major Tom on January 26, 2020, 09:18:59 PM

Quote from: Yoni159 on January 26, 2020, 08:59:39 PM

I dont need new one . I only want to know if my engine works fine .

If gapped correctly - not cracked, should work fine. My point is, while it is out, why not spin in a new one and you'll not have to look at it again for 10's of thousands of miles?

Stig

Title: Re: Does the spark plug seems ok?
Post by: Yoni159 on January 26, 2020, 10:17:18 PM

Because i can use few more km with this spark plug and also i dont have new one. But my point is to know if my engine runs good because i thought mu spark plug overheat because his had a black colour

Title: Re: Does the spark plug seems ok?
Post by: Stig / Major Tom on January 27, 2020, 02:12:40 AM

No sir.
Please research some photos of spark plugs...and what the various colors & conditions can tell you.
This will save you from seeing trouble where none exists.
Light color plug tips tell one thing. Dark tell another.
You'll find it interesting.
Stig

Title: Re: Does the spark plug seems ok?
Post by: scooterfan on January 27, 2020, 05:32:43 AM

I’ve had a look at your spark plug and to my mind the color at your plug is perfectly fine.

You need to have a look at the color on the center and ground electrode - which is grey / whitish at your plug. Perfectly fine.

The black part at the bottom end of your plug is quite normal as well- no reason to worry about. The black color just came from burnt fuel gasses which builds up by time.

The only “problem” I could see - the center electrode seem to be slightly “rounded” - which is an indication of slight wear.
If you just check and re-set the electrode gap again, I think the spark plug should be perfectly fine for quite a while.