Question about 2003 Yamaha TT-R 225

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Trouble starting my 2003 TTR 225

The following items on my TTR 225 were replaced
- spark plug
- exhaust (replaced with an FMF Power Core 4)
- air filter
- battery

I can't get my bike to run. The battery has plenty of juice and when i spray starting fluid into the spark plug hole the bike will start for a second and when i rev the gas the bike just dies. I have the gas turned on, but for some reason the bike just doesn't want to run and I don't know how to fix it. What should I do?

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  • drazticconce Jan 13, 2009

    I drained the gas out of the tank before adding new gas. I didn't drain it out of the carb. Thanks for the info about not spraying it in the spark plug hole. I will try it tonight

  • Anonymous Mar 23, 2014

    Bike will run slow and then dies out and has no power


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Mine did the same thing. You should take the cauborator out and clean it. It possibly has some build up where the gas line connects. Next you need to check your gas lines to make sure it isnt pinched/blocked/etc; Thats all i did for mine and it ran perfect.

Posted on Jun 24, 2009

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The cold blooded, hard to start is REAL common on these bikes. The fix I used for mine was to drill out the brass plug that blocks access to the pilot jet screw and turn turn it out 1/2 turn at a time until you get the easier start. I went about 1 1/2 turns out before I was happy. These things are, as I mentioned, cold blooded, and will still need to warm up before running smoothly. careful when you drill out the plug, go slow, you dont want to punch through and mess up the screw it is covering. the plug is about 3/16" thick. I actually drilled a 1/8" hole in it, then drove a drywall screw into the hole and pulled it out. the plug is there for emissions reasons. Yamaha has to have it set lean and "tamper proof" to abide by the laws.

Posted on May 20, 2009

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How old is the gas it may have a lot of water or junk in it.drain the bowl on the carb and drain the fuel out of the tank, check the petcock screen inside the gas tank. also i would not spray start fluid into the plug hole, it could blow a hole in the top of your piston,spray a little right into your air cleaner or carb.good luck

Posted on Jan 13, 2009

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Is it practicle to swap out a 2003 Yamaha TTR 225 carb for a newer 2005 and up TTR 230 carb?

Hi, Anonymous if you have changed your fuel delivery system, air filter size or flow rate, mufflers or exhaust system or a significant change in altitude your carburetors need re-tuning and if your fuel system (gas tank, filters, fuel valve and carburetor) is contaminated with ethanol sludge, varnish, rust, dirt, water etc. or your bike has been sitting for months or years without running these components must be "PROPERLY" cleaned and reassembled "CORRECTLY" before any adjustments can be made. Tuning your carburetor is fairly simple once you understand the basic principals. You engine is a simple airbox sucking air in and blowing it out, it is finely tuned at the factory for maximum performance once you upset that delicate balance by changing air filters, camshafts or exhaust systems your performance may go down the and the engine may run poorly, you need to compensate the air-fuel mixture in the carburetor in order for the engine to run smoothly and at peak performance. If you are running multi carburetors you need to sync them first and make sure your air cleaner element is clean and dry for paper elements or lightly oiled for foam and meshed elements and properly installed. Here is how and where you compensate trouble: "TIP" if your engine "BOGS" your not getting enough fuel.
1. Closed to 1/8 throttle is managed by the air screw and pilot/slow jet.
2. 1/8 to 1/4 throttle is managed by the air-screw, pilot/slow jet, and throttle slide.
3. 1/4 to 1/2 throttle is managed by the throttle slide and jet needle.
4. 1/2 to 3/4 throttle is managed by the jet needle, needle jet, main jet, and air jet.
5. 3/4 to wide open throttle is managed by the main jet and air jet.
6. Wide open throttle is managed by the main jet.
If you are running lean, spark plug electrode color is white, engine runs hot and feels like it is starving for fuel you need to go up on the jet size or move the c-clip down one notch. If you are running rich, spark plug color is black or dark gray, engine runs cool, and bogs down when accelerating you need to go down on jet size or move the c-clip up one notch. When your carburetor is properly tuned for maximum performance your spark plug electrode will be a light tan color like coffee with cream. If you prefer fuel economy over performance you can go down on main jet sizes until a satisfactory level of lower performance is acceptable versus MPH, your spark plug color will be whiter and your engine will run warmer. These tuning adjustments will only make improvements if your intake and exhaust system have no air leaks or sealing issues and the entire electrical system is in proper working order and you have no mechanical issues. For more information about your issue and valuable "FREE" downloads that you will need please click on the websites below. Good luck and have nice a day.
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My ttr 90 is spitting and sputtering when you give it gas and i cleaned the carb multiple times and i cleaned the spark plug and put a new air filter in ?

Hi, Austin and the usual suspects are:
1. Severely discharged or a damaged battery, should have 12.5 volts or better and be able to pass a load test if necessary.
2. Check battery terminals for damage or corrosion, check the battery cables at "BOTH" ends for loose, corroded, or broken connectors, "INSIDE" and outside the cable harness, perform connector wiggle test and check cables with an ohmmeter if necessary.
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5. Spark plug gap too close or too wide.
6. Faulty ignition coil, module, and or sensor.
7. Loose, dirty, or corroded ignition module connector at crankcase.
8. Faulty CKP or CMP, MAP, ETS, ATS, TPS, O2 sensor.
9. Dirty air filter.
10. Intake air leak.
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12. Old dead or bad fuel.
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14. Vacuum line from intake manifold to fuel valve is broken, cracked, pinched, or missing.
15. Carburetor controls misadjusted.
16. Damaged carburetor.
17. Incorrect valve timing.
18. Weak or broken valve springs.
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For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have nice a day.
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Start by removing and cleaning the carb, it may not need any parts.
also change the oil, fit new air filter, new spark plug, and check the valve clearances

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