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Everything Dirt Bike
Make / Model Specific
Kawasaki
Smokey '99 KX250 (more than usual)
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<blockquote data-quote="Nighthawk016" data-source="post: 74515" data-attributes="member: 334"><p>I just rebuilt my RM125... thats normal, when you go up into the higher rpm's it creates more emissions, and because the RPM's are dropping the positive pressure in the expansion chamber is dropping also which slows the rate that your bike can push the exhaust smoke out at, hence the small puff you get on deceleration. </p><p></p><p>If you are TRULY that worried about it, go ride your bike normally for a few hours, and let it cool down, and read your plug, if you are rich it will either foul or be completely black, imo what you are looking is good jetting not perfect jetting, meaning the tip of the electrode is black, and its a deep brown color near the bottom, bottom meaning all the way in the plug of course.</p></blockquote><p></p>
[QUOTE="Nighthawk016, post: 74515, member: 334"] I just rebuilt my RM125... thats normal, when you go up into the higher rpm's it creates more emissions, and because the RPM's are dropping the positive pressure in the expansion chamber is dropping also which slows the rate that your bike can push the exhaust smoke out at, hence the small puff you get on deceleration. If you are TRULY that worried about it, go ride your bike normally for a few hours, and let it cool down, and read your plug, if you are rich it will either foul or be completely black, imo what you are looking is good jetting not perfect jetting, meaning the tip of the electrode is black, and its a deep brown color near the bottom, bottom meaning all the way in the plug of course. [/QUOTE]
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Everything Dirt Bike
Make / Model Specific
Kawasaki
Smokey '99 KX250 (more than usual)
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