It starts when it is at home in the garage but if you push it outside and then try to start it will not start
SOURCE: yamaha dt 125 r 2004 wont start.
hi m8,, to have to put a booster on it ,,means the battery isny holdin a charge,,if they are stood 4 ages they dont last long,, u must 12v or just over to turn it over,, and while its runnin at least 14,7 volts goin in to the battery,, when it runs,or if u get it goin,, put a tester on the battery terminals,+ and - ,make sure theres 12v,, start her up,, and it should read 14v..if so then the altenater is fine ,,or if the lites get brighter as your revvin it up ,the altenater works fine, if it doesnt star again wen turned off,,,then battery has had it, and wont hold its charge..
SOURCE: hi my yamaha sw 125 trailway does not start first time
Sounds like a battery that will not hold a charge, not enough left in the morning for a good spark. Once running for a short bit the battery gets recharged so the bike starts all day. Then the battery dissipates the charge overnight. Try a morning jump start from your car battery.
Before you spend $50 or so on a battery, look to see if there is water covering the top of the battery plates. If so then the current battery needs to be replaced. If not, add water to cover the top of the plates and ride it for a day. See if it holds a charge now. Battery may still be bad but it was worth a shot.
Remove the water trap bowl at the bottom of the petcock, (gas valve). Is there any water or trash in the bowl? Drain a cup of gas from the tank. Is there any water or trash in the cup? Dump it, clean it and re-mount it, ( not all bikes have a water trap bowl ).
Drain the carburetor. There should be a screw on the lower side of the carb float bowl. Remove the screw then replace it after the fuel drains. Turn the gas back on and wait a minute for the carb to fill with gas. Install a new stock NGK spark plug and try to start the engine. If the bike doesn't start and run properly then shut off the gas and remove the carburetor from the engine.
Remove the float bowl and clean the entire carb with a spray carb cleaner from the auto parts store. Wear protective goggles to avoid getting spray in your eyes. Spray into all the little airways and fittings in the carb. Remove the idle screw and the air screw on the outside throat of the carb and spray into the screw holes as well.
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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. 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. This process should get you back on the road.
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SOURCE: yamaha wr 400 2000 model pulled apart carby to clean
big spring is for the dighram! the only other wouls be for the pointy mixture screw
Cheers Rob
wind the screw in till it just stops [not hard]
then wind out about 1 & 3/4 turns that should be a close air fuel mix then adjust idle & mix till you get it right
Cheers Rob
SOURCE: did yamaha make a wr 400 in 2004?
I think you will find that the WR426 was last made in 2002. From that point forward it was WR250 and WR450 in the manufacturing line.
SOURCE: My 2003 WR 450F was easy to kick start/push button
Did you check the carb? The float might be stuck traping liquid in it, causing it to act like its flooded. Or the Jet could be plugged up?
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