Question about 2006 Yamaha yZ 250

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My 2006 yz 250 will start and run good for a second but then it pretty much floods itself, it is the craziest thing ive ever seen! it almost acts like the choke is stuck on and the more gas you give it the quicker it dies? please help???

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If you are flooding your cylinder, you may have a carb issue. I would suspect that the float needle is not seating. You may need a needle replacement, or float adjustment. But if the engine is whinning out and revving high, then you may have a air leak or a need adjust your air screw.

Posted on Mar 14, 2013

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Posted on Jan 02, 2017

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SOURCE: yz 250 1992 wont kick start

check your compression I had a 94 yz that done that when i checked the compression it was really low so I put new rings on the piston and that's all it took to bring her back to life

Posted on Feb 03, 2009

robotek
  • 1512 Answers

SOURCE: yzf 250 wont run without the choke

Hi mikelapt
You will have a carby problem. When the choke is one, and different fuel circuit is used. When you turn off the choke, you go back to the idle circuit of the carb is used, when under throttle, main jets kick in. You probably have a blockage in one of these circuits. Strip the carb down, clean with carby cleaner, blow out all air circuits and jets with compressed air, then setup the idle mixture and tick over speed. Always work with fresh fuel, and drain off, discard any fuel older than a couple of months. It goes off, and turns to a gel  like substance that blocks up your carby. Hope this has explained your problem. Happy to talk to you more about it. A FixYa vote is a great reward for for my time taken to explain this to you. Cheers
regards robotek

Posted on Feb 08, 2009

  • 3567 Answers

SOURCE: suspension settings for a 2000 yz 250

Just put all settings at mid-range. Then adjust from there for desired softer or stiffer ride.

Posted on Mar 11, 2009

fastboyz
  • 674 Answers

SOURCE: 1982 yz 250 coolant running thru frame can i run coolant out side

just bypass it with a hose

Posted on Apr 19, 2009

  • 3567 Answers

SOURCE: when start go to rev it just dies

Remove the throttle stop adjuster and the air screw adjuster and spray carb cleaner in the holes.
Be sure to put these two screws back in the same hole they came out of. IMPORTANT > do not tighten these two adjusters down. Only screw these in until they LIGHTLY seat. Now turn each adjuster one and one half turns outward. Turn the pilot screw 1/4 turn counter clockwise. Check the float level. Before putting the slide back in the throat of the carb, move the clip on the jet needle one notch lower.Put the rest of the carb back together, clean the air filter and install the carb. Let the float bowl fill then start the engine. Adjust the idle speed with the Throttle stop screw. This process should get you back on the road. A “very helpful” rating for this answer? Thanks!


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Posted on Jun 22, 2009

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Hi, Travsi and the usual suspects are:
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3. Float valve and/or valve seat worn or damaged.
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6. Excessive "PUMPING" of hand throttle grip.
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My 2003 yz250 runs full throttle as soon as it is started. Checked the obvious stuff - carb throttle....it started revving out of control intermitantly now its full time. Any ideas?


3 things... First twist the throttle rapidly and listen for the carb slide to move up and down,, ya should hear a clicking in the carb... if so slide ok.. Sure bout the throttle cable ? At grip ? When starting the bike takes alot of kicks to get started ? As if were flooded ?

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1 Answer

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i would try cleaning the carb out & flush the tank,then try new gas.that should work.ive never heard of it being eletrical.

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