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In order to keep the EPA happy, carbed bikes are forced to have very lean midrange jetting. If it's 90 deg out, then you have little or no problem, but if it's cold, it could cause the problems you are describing. I bought a 2000 W-650 from Florida for my birthday in '09 and it ran terrible, exactly as you are describing, until I took the carbs apart, raised the needles about .050 inches, and drilled out the tamper proof caps, and adjusted the idle mixture to a state more like reality. When it's cold out here (30-35 deg) it runs bad for the first mile or so, but when it's warm here, it runs nearly perfect even cold. Adjusting the needles only fixed the lean midrange, didn't effect the fuel mileage. I'm getting 50+ on the highway, and it runs so much better, it's like a different bike.  The original owner only put 9000 miles on it in 9 years, I put 8000 on it since Feb. of '09 You might want to look into a jet kit, like from Dynojet. The kit for my W is around $80, but it has 2 carbs. If you decide to do this with the jetting, don't get carried away, since it's really easy to make it too rich and cause other problems. R.T.F.M.

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Topic summary

Posted by theylive

- December 10, 2010, 12:50:46 PM

Yes, just mix it in w/your fuel... It may help you it may not and you can buy it in the automotive section at Wal Mart or Ace hardware ect..

Posted by topherloaf

- December 10, 2010, 11:34:07 AM

Just put it in the tank? I put a fuel cleaner in a month ago when I changed the plugs.

Posted by theylive

- December 10, 2010, 11:18:47 AM

I had a similar problem. I would suggest you pick up a pint of "sea foam" and run several ounces through your fuel, that should cure any hesitation and cleans your carbs ... amazing product. Who cares who's way your in... you're a biker

Posted by topherloaf

- December 10, 2010, 11:11:53 AM

I mean, I let it warm up, I revved it, I even rode it while the choke was out and it acted normal. So when I pushed the choke in, it started stalling and acting like it wasn't warm yet. Should I just ride around with the choke partly pulled out? I'm so irritated at it because I was in people's way and it was embarrassing. It looked like I didn't know how to ride a motorcycle.

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