Question about 2003 Yamaha YZ 250

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I have a 1991 yamaha yz 250 it starts then shuts off

I have a 1991 yamaha yz 250 it starts then shuts right off ? i was told to get the carb cleaned and the throttle cable?

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Change the pkug first buy a br8eg plug off ebay and see how this goes get back to me also are you using the choke on start up

Posted on Sep 29, 2009


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I have a yz 250 Yamaha layed it over on it side and now can't get it to start put new spark plug in has spark but won't fire

fuel problem take out the carb and clean all the jets and the bowl also put a high flow fuel filter in as a precaution incase there is debree in the tank your problem is that you are not getting enough fuel or any at all.

May 11, 2012 | 2003 Yamaha YZ 250

1 Answer

Starts hard and wont idle, no low end power, has been sitting i'm told, cleaned carb, fresh gas and new plug.

The starting hard and Idling problem sounds like carb needs cleaning. If this bike has moved from a different area it might need different jets in the carb. I might have jumped the gun the gas/oil mix ratio is very important check that first. your spark plug should be a golden brown when mixture and right jets are in. This might resolve the low end power if the oil mix is to rich or you might need piston rings. GOOD LUCK

Aug 09, 2010 | 2003 Yamaha YZ 250

1 Answer

Hey Guys I have a 2001 Yamaha yz 250 f it idles high and goes to a low idle then dies. I restart it idle it high to warm it up but does the same thing, The pipe gets red then i shut it down.Anyone know...

check for vac leck at the carb. start the bike and take some carb spray and spray around the carb and carb boot. let me know what happens.
C.C. Motorsports

Mar 14, 2010 | 2003 Yamaha YZ 250 F

1 Answer

1991 yz 80 won't run with choke off.

Go to , and down load a (free) manual, then go through the trouble shooting section.

Dec 30, 2009 | 1991 Yamaha TZR 250 R

1 Answer

06 yamaha rhino 450. ran fine when parked 6 mos ago. Now it wont start. It runs when you put gas in carb but thats it. no fuel in filter, took pump apart, it was clean, and no tears in diaphrams, I even...

foat problems buddy adjust float in the manual it is set to high so it is shutting fuel off take carb off take bowl off and adjust the metalk the little valve is hanging on

Aug 09, 2009 | 2003 Yamaha YZ 250

1 Answer

My 2004 yz 250 starts and runs but cuts out when put under load. tired a new stator but no better.

Sounds like dirt in the carb, there are two sets of jets, one for idle one for load.
Strip and clean the carb.

Jul 19, 2009 | 2004 Yamaha YZ 250

1 Answer

Yz 125 wont start

Hi,the fuel bowl is the bottom of the carb,take that of and make sure the little holes in the jets are clean.does it have a spark,have you fitted a new plug.

May 19, 2009 | 2003 Yamaha YZ 250 F

1 Answer

Bike runs well then dies

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

Apr 27, 2009 | 2003 Yamaha YZ 250

1 Answer

Engine dies, starts right back up then dies, now won't start

Springtime start ups after sitting up for awhile can be a problem. You have nothing to loose, spray some starting fluid into the air cleaner. That may be just what is needed for an easier spring start.

Apr 05, 2009 | 2003 Yamaha YZ 250

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