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Everything Dirt Bike
Make / Model Specific
Kawasaki
Another 2004 KX250F Project/Build
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<blockquote data-quote="SRAD97750" data-source="post: 223359" data-attributes="member: 425"><p>If your interested as to why that is Mikey, (actually you know) it's because the AP has nothing at all to do with starting.</p><p></p><p>The choke/enrichment circuit on all carburetors is there to allow the shut throttle to bypass the idle jets and pull a fuel rich mix through the choke/enrichment passage to assist in starting. Older models use a butterfly valve that closes off 90% of the carburetor throat to simulate the same effect through the actual jets.</p><p></p><p>This is why every manual will tell you not to open the throttle AT ALL until the bike has started. The enrichment circuit needs the throttle shut to operate. Also, it can flood the engine due to the squirting nature of the AP if you were to say, "rap on the throttle" a few times before starting.</p><p></p><p>We all know the AP makes up for the initial bog on quick throttle applications of an already running, warmed up 4T engine, but nothing more.</p><p>-BIG DAN<img src="https://www.dirtbikeaddicts.com/static/images/smilies/thumb.gif" class="smilie" loading="lazy" alt=":thumb:" title="Thumb :thumb:" data-shortname=":thumb:" /></p></blockquote><p></p>
[QUOTE="SRAD97750, post: 223359, member: 425"] If your interested as to why that is Mikey, (actually you know) it's because the AP has nothing at all to do with starting. The choke/enrichment circuit on all carburetors is there to allow the shut throttle to bypass the idle jets and pull a fuel rich mix through the choke/enrichment passage to assist in starting. Older models use a butterfly valve that closes off 90% of the carburetor throat to simulate the same effect through the actual jets. This is why every manual will tell you not to open the throttle AT ALL until the bike has started. The enrichment circuit needs the throttle shut to operate. Also, it can flood the engine due to the squirting nature of the AP if you were to say, "rap on the throttle" a few times before starting. We all know the AP makes up for the initial bog on quick throttle applications of an already running, warmed up 4T engine, but nothing more. -BIG DAN:thumb: [/QUOTE]
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Everything Dirt Bike
Make / Model Specific
Kawasaki
Another 2004 KX250F Project/Build
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