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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Spark plug colour query.
Posts: 175
Joined: 2/20/2015
Location: GBR
Posts: 597
Joined: 12/24/2011
Location: Benton, LA USA
Posts: 175
Joined: 2/20/2015
Location: GBR
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.
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Posts: 4301
Joined: 8/26/2006
Location: FL, USA
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.
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Posts: 6806
Joined: 9/18/2007
Location: York, SC USA
Posts: 2592
Joined: 10/20/2011
Location: Marlborough, MA USA
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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