Question about 2002 Yamaha Road Star Warrior

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Please help 99 350 warrior idles but back fires and spits and dies I know no one can be 100% never have seen the bike just looking for pointers and a start point

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Check the valve clearances
new plugs
clean air filter
drain carb bowls with the small drain screws.

change the oil

try these standard tune up procedures first

It also may need the carbs cleaned

Posted on Oct 15, 2010

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Posted on Jan 02, 2017

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For more information about your issue and valuable "FREE" downloads that you need please click on the links below. Good luck and have a nice day.
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I had a simular problem on one of my other bikes. Bike will start fine, idle, rev up, but when you try to go it would spit and sputter. I found that the carbs were gummed up and not firing on all cylinder. easy way to check is start it up let it idle for a few seconds then get a spray bottle with water and spray the exhaust. if the cylinder is firing the water will sizzle if it is not it will just bead off. DO NOT do this when it is HOT this can cause many other problem only just after start up with a few minutes of running. Then you would know if you have some dead cylinders and then you can start back tracking from that because it could be carbs, plugs, coils, loose wire, but it will give you a start.

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Spitting black


I have an 06 cr 250. I used to mix my fuel at 32:1 and it ran fine for a year or so as of late it's been fouling plugs every single ride. I've ridden 2-strokes all my life and know how to ride the powerband but lately its been spitting oil out of every seam in the exhaust. It used to maybe have a couple drops after a ride out the end of the pipe but now its leaking from the connection from the case, the pipe to muffler connection and a lot out the back of the muffler. i switched to 40:1 about a month ago and that's what is happening, i couldnt imagine what it'd be like if i left it at 32:1. I took the carb out and looked at my jet sizes, they are both a size smaller than stock. Any help? Also, the bike is so tempermental that I have to have all my gear on when i start the bike because I cant take my hand off the throttle for even a second or else the bike will foul the plug and die literally within 2 seconds. I know they arent meant to idle but its kinda extreme. my friend has a 2005 cr 250 and mixes 32:1 has no problem, can start his bike on the stand and walk away from it for 5 mins and put his gear on.it'd idle for at least 10 min before it'd die, but he'll kick it and it'd start right back up. I've heard running bean oil would help, but I've also heard it has a tendancy to seize up the rings? any truth in that? ,I would try more gas in your mixture, before you start changing everything. Its all in the way your ride, some people can do 32:1, some 40:1(me), some 50:1. ,,,

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