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Everything Dirt Bike
Make / Model Specific
Yamaha
YZ450F 2005 roll starts but won’t kick start
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<blockquote data-quote="subserver" data-source="post: 228862" data-attributes="member: 5338"><p>Hi everyone! I am new here so apologies if I have not formatted this correctly.</p><p></p><p>I have a YZ450f 2005 model that my friend blew the head on valve bouncing. It was pretty ugly inside to say the least I have rebuilt it (new piston, barrel, and entire head), but sadly I can’t get the thing to kickstart anymore. It used to start first pop pretty much every time. I can bump start it then it runs fine, just can’t kick start it. </p><p></p><p></p><p>I’ve checked compression, sitting at 150PSI. The cam chain appears to be set correctly, lines up the I on the crank then the dots On the cam with the case. I’ve put in a new spark plug, didn’t change anything. Auto decompression seems to be working fine too. I’m not really sure what else now, was going to take to the mechanics in town to have a go but thought I’d try my luck here first <img class="smilie smilie--emoji" loading="lazy" alt="☺️" title="Smiling face :relaxed:" src="https://cdn.jsdelivr.net/joypixels/assets/6.5/png/unicode/64/263a.png" data-shortname=":relaxed:" /></p><p></p><p>Any ideas what might be up/need to check? Any help would be greatly appreciated! </p><p>Cheers,</p><p>Ryan</p></blockquote><p></p>
[QUOTE="subserver, post: 228862, member: 5338"] Hi everyone! I am new here so apologies if I have not formatted this correctly. I have a YZ450f 2005 model that my friend blew the head on valve bouncing. It was pretty ugly inside to say the least I have rebuilt it (new piston, barrel, and entire head), but sadly I can’t get the thing to kickstart anymore. It used to start first pop pretty much every time. I can bump start it then it runs fine, just can’t kick start it. I’ve checked compression, sitting at 150PSI. The cam chain appears to be set correctly, lines up the I on the crank then the dots On the cam with the case. I’ve put in a new spark plug, didn’t change anything. Auto decompression seems to be working fine too. I’m not really sure what else now, was going to take to the mechanics in town to have a go but thought I’d try my luck here first ☺️ Any ideas what might be up/need to check? Any help would be greatly appreciated! Cheers, Ryan [/QUOTE]
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Everything Dirt Bike
Make / Model Specific
Yamaha
YZ450F 2005 roll starts but won’t kick start
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