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Anybody know what this plug could be for?

2K views 10 replies 5 participants last post by  Engr450R 
#1 ·
Found this capped plug around the battery area on my 09 yfz450r. I have had low rpm hesitation on the quad being bone stock since i bought it from original owner and have went through everything to not figure it out yet..working on trying to fix it with my pc5 (new) atm. Any input greatly appreciated!
 

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#2 ·
It looks like it could be the taillight plug, do you have a taillight on it?
 
#9 ·
View attachment 87863


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Jesus even worse. Preview looks crystal clear, however soon as you post, garbage. Both attachment and pic upload feature. Sorry guys, I tried. Important thing is, mystery solved it’s a diagnostic connection port as most suspected. Straight out of the manual that you can’t see in the pics lol


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