Question about Yamaha TT-R 250 Motorcycles

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Started, died will not stay started unless starter button is held

Bike started and was idling fine, gave it a little throttle and it died. Now it will only run if you hold the starter button in, once you let off the bike dies.

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  • sclipner May 12, 2009

    Thanks for all your help. It was the spark plug, it had a crack in it.

  • max b Oct 01, 2013

    it still refuses to go larry! what else can i do

  • max b Oct 01, 2013

    it is a suzuki DR200

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Check for spark and fuel. The spark should be blueish-white and consistently flashing. If the ark is dull-orange and/or inconsistent then there is a problem. the fuel should flow freely from the pet-****, through the needle and seat, and past the primary and secondary jets. There are other things that can cause this problem, check the intake manifold gasket, spark plug, wire, water in the gas, and so on. well good luck.

Posted on May 12, 2009

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Posted on Jan 02, 2017

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I just did the top end on a YZ 125 put V-Force reeds and the bike doesn't start unless I pop start it and then it runs for a little bit but if I give it to much throttle it dies and very hard to start


Hi, Chad and the usual suspects are:
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2. Fuel filter clogged.
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4. Float needle and seat sticking.
5. Float level too low.
6. Carburetor bowl vent line clogged/blocked/pinched.
7. Idle adjusting screw set too low.
8. Air/fuel mixture screw set too lean.
9. Idle port, transfer ports, slow air jet clogged.
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11. Faulty fuel pump.
For more information about your issue and valuable "Free" downloads that you will need please Click on blue links below. Good luck and have a wonderful day.
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Yamaha YZ125T1 Owner Service Manual
OEM parts for Yamaha
http://mybikemanuals.com/yamaha/yamaha-yz-owners-manuals

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1 Answer

2003 yz 250 starts and idles but runs rich and bogs as soon as the throttle is applied


Hi, Anonymous and the usual suspects are:
1. Throttle cables misaligned or misrouted.
2. Damaged or restricted fuel tank venting system.
3. Intake system air leak.
4. Vacuum piston malfunction.
5. Accelerator pump leaking or no output.
6. Plugged bowl vent or overflow.
7. Fuel level in bowl too low.
8. Restricted fuel supply passages.
9. Plugged jets or passages.
10. Worn or damaged needle or needle jet.
11. The enrichner valve not seated or leaking.
For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have a nice day.
2002 yz250 idles fine but bogs and tries to die when twisting the throttle...
Bike dies when you give it throttle
YAMAHA YZ250 LC Owner Service Manual
OEM parts for Yamaha
http://mybikemanuals.com/yamaha/yamaha-yz-owners-manuals

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1 Answer

Wont idle properly.


vacuum leak.....get some carb cleaner an when you can get the bike to idle somewhat normal spray around hoses and intake manifolds...if idle increases that where the problem is.

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