Question about 2003 Yamaha TT-R 225

3 Answers

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.
Yamaha TTR Carburetor Parts Accessories eBay
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May 07, 2014 | 2003 Yamaha TT-R 225

1 Answer

Ttr 90 wont stay running and makes a ringing noise


Is the idle properly adjusted? The ringing is normal for a 2-stroke.

Mar 18, 2014 | 2005 Yamaha TTR 90 E

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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.
3. Spark plugs in bad condition or partially fouled.
4. Spark plug cables in bad condition and leaking check for spark leakage in the dark
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.
11. Water, dirt, or rust in the fuel system, carburetor and/or filter.
12. Old dead or bad fuel.
13. Fuel tank vent system plugged or carburetor vent line closed off.
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.
19. Damaged intake or exhaust valve.
20. Check for engine trouble codes
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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Mar 31, 2013 | 2005 Yamaha TTR 90 E

1 Answer

TTR 225 engine loses power at high rpm


Hi, Anonymous 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.
3. Spark plugs in bad condition or partially fouled.
4. Spark plug cables in bad condition and leaking check for spark leakage in the dark
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.
11. Water, dirt, or rust in the fuel system.
12. Carburetor damaged, contaminated, sticky float, plugged jets.
13. Fuel filter clogged.
14. Old or contaminated fuel.
15. Fuel tank vent system plugged or carb vent line closed off.
16. Gas cap diaphragm valve faulty.
17. Vacuum line from intake manifold to fuel valve is broken, cracked, pinched, or missing.
18. Carburetor controls misadjusted.
19. Incorrect valve timing.
20. Valve springs floating, weak, or broken.
21. Damaged intake or exhaust valve.
22. Incompatible performance parts.
23. Check for engine trouble codes.
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.
http://www.thumpertalk.com/topic/300734-1999-ttr225-missing-at-high-rpm
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1 Answer

2001 ttr 225 bike sat all last year. Would start this spring but not idle. Now it won't start. I know the carb had old gas. Where can I find a manual so I can take it apart and know what parts to...


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

May 27, 2011 | 2002 Yamaha TT-R 225

2 Answers

I have a 2003 ttr 225, it is tough to start, when it does start it idles high, when i get into gear it has trouble going, when it does go it bogs and sometimes backfires.. drove today it stalled in second...


Remove, dissemble and clean the carb. Check the rubber diaphragm for cracks, pinholes and poor seal at the gasket. Install a new spark plug, clean the air filter. The high idle is caused by a lean fuel mixture. Outside air is entering the mix. Look at the rubber "O" ring on the carb joint. Check for cracks and hardening of the ring. Your carb will have a plug or a hose at the front edge of the carb joint. Check the plug / hose and clip. Check for cracks in the plug / hose and hardening. Check the entire length of the hose if a hose is present. Please rate my answer. Thanks! tombones49_43.gif

Mar 31, 2011 | 2003 Yamaha TT-R 225

1 Answer

What kind of horsepower increase will an FMF power core 4 exhaust give me and what kind of sound will it give me for an XR100R


FMF are great pipes, and a fantastic addition to any motorcycle. For the XR, you could expect a few more horse power, and you will notice a lot more tourqe around mid throttle. The sound will be awesome!

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take your ignition to a good lock smith and he should be able to cut you another if he is any good

Jul 07, 2009 | 2003 Yamaha TT-R 225

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Possible running too rich! 2001 TTR 225


First I would pull the spark plug to see what it looked like, you want it to be a chocolate color. If it is black and wet then yes you are running rich. Also check your air filter, go ahead and clean the filter. If all this doesnt solve the problem then we probably need to look at our carb.

Jan 07, 2009 | 2004 Yamaha TT-R 225

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