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Everything Dirt Bike
Make / Model Specific
Yamaha
The 1999 YZ250
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<blockquote data-quote="Trfsrfr" data-source="post: 209836" data-attributes="member: 3959"><p>I have a Bausch & Lomb lighted Lenscope, and I wish I had a way to take a pic of a spark plug through it.</p><p></p><p>I swapped out the 178 main jet for the 170 I have trying to be conservative, and took it around the block at my place twice (asphalt residential neighborhood, so couldn't get too crazy with it), and pulled it into my garage and gave it some revs.</p><p>I am not sure it was entirely hot cuz I didn't want to risk getting a ticket...</p><p>The brand new plug is totally different than the one I cut open, seen above. It's no longer grey and ashy.</p><p></p><p>The insulator is more like a mocha chocolate brown, with a darker wet looking ring around the top of it and has some silver speckles on it, and the center ground electrode looks like it has accumulated some silvery build-up on it.</p><p>Here is a pic;</p><p></p><p>[ATTACH=full]30102[/ATTACH]</p></blockquote><p></p>
[QUOTE="Trfsrfr, post: 209836, member: 3959"] I have a Bausch & Lomb lighted Lenscope, and I wish I had a way to take a pic of a spark plug through it. I swapped out the 178 main jet for the 170 I have trying to be conservative, and took it around the block at my place twice (asphalt residential neighborhood, so couldn't get too crazy with it), and pulled it into my garage and gave it some revs. I am not sure it was entirely hot cuz I didn't want to risk getting a ticket... The brand new plug is totally different than the one I cut open, seen above. It's no longer grey and ashy. The insulator is more like a mocha chocolate brown, with a darker wet looking ring around the top of it and has some silver speckles on it, and the center ground electrode looks like it has accumulated some silvery build-up on it. Here is a pic; [ATTACH=full]30102[/ATTACH] [/QUOTE]
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Everything Dirt Bike
Make / Model Specific
Yamaha
The 1999 YZ250
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