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Everything Dirt Bike
Make / Model Specific
Yamaha
yz big bores ?
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<blockquote data-quote="ossi" data-source="post: 13611" data-attributes="member: 33"><p>I use a YZ 2nd ,3rd and 4th. !st and 5th are WR.</p><p>I had the full WR transmission in my 01. </p><p></p><p>My 265 is just great for me in the hills and forest up</p><p>here. I am 187 pounds right now and really have all</p><p>the power I could use. I have hit the desert with this</p><p>one but have not gone Monster Climbing as of yet.</p><p></p><p>I can say I rode this bike back to back with a YZ 450</p><p>and the pull was different but no greater then each other.</p><p></p><p>Once again I post</p><p>the rough calculation; 0.12 HP per CC for a 4t, 0.2</p><p>HP per CC for a 2t. Both of these being modern </p><p>correctly jetted motors. </p><p></p><p>So you can have a Gorr YZ 300 2t at 60 HP by calculation</p><p>or a YZ 543 4t at 65 HP by calculation. I would run the </p><p>gear box as stated above in my 265.</p><p></p><p>Since we are spending Spies Dollars he should build both</p><p>and meet us at Jawbone so we all could test them<img src="https://www.dirtbikeaddicts.com/static/images/smilies/banana.gif" class="smilie" loading="lazy" alt=":banana:" title="Banana :banana:" data-shortname=":banana:" /></p><p></p><p>All that said I am a 2t guy, but would love a 4t for the desert.</p></blockquote><p></p>
[QUOTE="ossi, post: 13611, member: 33"] I use a YZ 2nd ,3rd and 4th. !st and 5th are WR. I had the full WR transmission in my 01. My 265 is just great for me in the hills and forest up here. I am 187 pounds right now and really have all the power I could use. I have hit the desert with this one but have not gone Monster Climbing as of yet. I can say I rode this bike back to back with a YZ 450 and the pull was different but no greater then each other. Once again I post the rough calculation; 0.12 HP per CC for a 4t, 0.2 HP per CC for a 2t. Both of these being modern correctly jetted motors. So you can have a Gorr YZ 300 2t at 60 HP by calculation or a YZ 543 4t at 65 HP by calculation. I would run the gear box as stated above in my 265. Since we are spending Spies Dollars he should build both and meet us at Jawbone so we all could test them:banana: All that said I am a 2t guy, but would love a 4t for the desert. [/QUOTE]
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Everything Dirt Bike
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yz big bores ?
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