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Everything Dirt Bike
Make / Model Specific
Yamaha
2014 yz450f fuel injector sizing for mod motor
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<blockquote data-quote="SRAD97750" data-source="post: 231959" data-attributes="member: 425"><p>Unfortunately, You know the answer.</p><p>A butt-dyno can only get you so far. My streetbike dyno tunes have been worth their weight in gold.</p><p>Starting becomes instant, almost no crank. off idle throttle applications become so smooth and useable.</p><p></p><p>Your starting issue is not with the size of the injector, but how it's being asked to operate at low rpm and starting, by the ECU.</p><p>I imagine the stock fuel injectors are not tapped out in stock form and have plenty of head room for you to tune with.</p><p>They need to be told to open more often or for longer, if you're needing more fuel to start.</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: 231959, member: 425"] Unfortunately, You know the answer. A butt-dyno can only get you so far. My streetbike dyno tunes have been worth their weight in gold. Starting becomes instant, almost no crank. off idle throttle applications become so smooth and useable. Your starting issue is not with the size of the injector, but how it's being asked to operate at low rpm and starting, by the ECU. I imagine the stock fuel injectors are not tapped out in stock form and have plenty of head room for you to tune with. They need to be told to open more often or for longer, if you're needing more fuel to start. -BIG DAN:thumb: [/QUOTE]
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Everything Dirt Bike
Make / Model Specific
Yamaha
2014 yz450f fuel injector sizing for mod motor
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