Spark plug colour query.

Tom711
Posts
202
Joined
2/20/2015
Location
GB
7/16/2017 10:22am
I jetted my sons sx65 using the pro circuit chart before he rode today and the bike sounded like it was running awesome but looking at the plug I'm a little worried it might be a bit on the lean side. What's your thoughts?

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Paw Paw
Posts
679
Joined
12/24/2011
Location
Benton, LA US
7/16/2017 12:01pm
The plug look old, but the color looks ok.

Paw Paw
Tom711
Posts
202
Joined
2/20/2015
Location
GB
7/16/2017 12:13pm
Cheers paw paw. The plugs only been in the bike a couple of rides, I noticed it was quite rich last time out so tried the different jetting today.
7/16/2017 2:19pm
Can't properly read a plug just looking at the top portion of the insulator. The "coloring ring" ,is down at the base of the insulator. A proper scope or cutting the threaded portion of the plug to expose the insulator, is the only true way to read plug coloring.
lumpy790
Posts
9145
Joined
9/18/2007
Location
York, SC US
7/16/2017 2:21pm
Tan to brown is the sweet spot

The Shop

pete24
Posts
2733
Joined
10/20/2011
Location
Marlborough, MA US
7/16/2017 4:02pm
it looks kinda dirty and im asuming its pump gas which if it is is fine if thats straight race gas its still to rich

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