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Everything Dirt Bike
Make / Model Specific
Yamaha
06 Wr250f runs bad
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<blockquote data-quote="JakeBoucher" data-source="post: 185470" data-attributes="member: 1844"><p>Pulled the carb and cleaned it out. Pretty clean, there was a small jet in the bottom of the bowl that seemed to have some goop in it. Bike ran better after that, took it for a ride and it would run good until top end and then it would fall flat on its face. Got back and checked for air leaks with some WD-40. Couldn't find anything. I noticed when I revved the bike it took a little time to fall back to idle. I unplugged the TPS and it fell back to idle like normal. So I took it for a ride and it ran pretty good, it was pull wheelies without effort. Brought the bike home and it sat for a few hours then I washed it up. I started the bike and choked it until it was warm. Turned the choke off and gave it some gas and it instantly died. Went through that 3 or 4 times so I finally left the choke on to pull it into my garage. The header was glowing bright red after that. So I let it sit for a minute and cool off a bit and fired it back up. Idle adjustment is hardly effective, with it turned all the way up it speeds up a little, and turned all the way down it will die. At idle I'll turn the throttle super slow and it still bogs and dies. If I start the bike and it is above idle it will rev up fine, but once I get down to idle it won't take any throttle. I did notice that the PO drilled 3 half inch holes or so in the baffle of the exhaust. Checked my jets and I have a 168 main, then a 68 and 42 pilot or leak jet. I'm not sure which one is pilot and which is leak jets. </p><p>This week I'll get a new air filter, plug, do my valve lash, and replace the header gasket. Might end up cleaning my carb again just to be sure.</p></blockquote><p></p>
[QUOTE="JakeBoucher, post: 185470, member: 1844"] Pulled the carb and cleaned it out. Pretty clean, there was a small jet in the bottom of the bowl that seemed to have some goop in it. Bike ran better after that, took it for a ride and it would run good until top end and then it would fall flat on its face. Got back and checked for air leaks with some WD-40. Couldn't find anything. I noticed when I revved the bike it took a little time to fall back to idle. I unplugged the TPS and it fell back to idle like normal. So I took it for a ride and it ran pretty good, it was pull wheelies without effort. Brought the bike home and it sat for a few hours then I washed it up. I started the bike and choked it until it was warm. Turned the choke off and gave it some gas and it instantly died. Went through that 3 or 4 times so I finally left the choke on to pull it into my garage. The header was glowing bright red after that. So I let it sit for a minute and cool off a bit and fired it back up. Idle adjustment is hardly effective, with it turned all the way up it speeds up a little, and turned all the way down it will die. At idle I'll turn the throttle super slow and it still bogs and dies. If I start the bike and it is above idle it will rev up fine, but once I get down to idle it won't take any throttle. I did notice that the PO drilled 3 half inch holes or so in the baffle of the exhaust. Checked my jets and I have a 168 main, then a 68 and 42 pilot or leak jet. I'm not sure which one is pilot and which is leak jets. This week I'll get a new air filter, plug, do my valve lash, and replace the header gasket. Might end up cleaning my carb again just to be sure. [/QUOTE]
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Everything Dirt Bike
Make / Model Specific
Yamaha
06 Wr250f runs bad
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