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Everything Dirt Bike
Make / Model Specific
Yamaha
Dang hard to cold start 05' ttr250
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<blockquote data-quote="SRAD97750" data-source="post: 228806" data-attributes="member: 425"><p>You should be looking in the carburetor... The only way to know what's installed is to pull and clean the existing jets, write down their size for your future reference.</p><p>While they are usually 'lean' from the factory, a stock bike will run and start just fine with stock jets, otherwise they couldn't sell them.</p><p></p><p>I would get the carburetor clean and reassembled, and try again. It is usually just that easy on a small 4T.</p><p>If the issue persists, valve spec should be checked, but unlikely, as it would be harder to start when hot, not cold as you describe.</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><p></p><p>EDIT: As the service manager at a Piaggio/Vespa dealership in 2005 one of my main jobs was to keep all 80 scooters on the floor able to be started cold, otherwise they couldn't be sold. You can never underestimate the power of a simple carburetor cleaning for hard starting when cold. Even if you cleaned it yesterday.</p></blockquote><p></p>
[QUOTE="SRAD97750, post: 228806, member: 425"] You should be looking in the carburetor... The only way to know what's installed is to pull and clean the existing jets, write down their size for your future reference. While they are usually 'lean' from the factory, a stock bike will run and start just fine with stock jets, otherwise they couldn't sell them. I would get the carburetor clean and reassembled, and try again. It is usually just that easy on a small 4T. If the issue persists, valve spec should be checked, but unlikely, as it would be harder to start when hot, not cold as you describe. -BIG DAN:thumb: EDIT: As the service manager at a Piaggio/Vespa dealership in 2005 one of my main jobs was to keep all 80 scooters on the floor able to be started cold, otherwise they couldn't be sold. You can never underestimate the power of a simple carburetor cleaning for hard starting when cold. Even if you cleaned it yesterday. [/QUOTE]
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Everything Dirt Bike
Make / Model Specific
Yamaha
Dang hard to cold start 05' ttr250
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