Question about 2002 Yamaha TT-R 250

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99 TTR250 that doesn't get spark

Did you find out what was wrong with your bike? What was it? Thanks

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Most will say an issue with the magneto / lightning coil.

Posted on Jun 19, 2009


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99 softail, turns over but wont fire

Hi Anonymous, and the usual suspects are:
1. Fuel tank empty
2. Fuel supply valve turned off.
3. Fouled spark plugs.
4. Engine flooded with gasoline as a result of over use of enrichner.
5. Fuel valve or filter clogged.
6. Vacuum hose to automatic fuel supply valve disconnected, leaking, or pinched.
7. Discharged battery, loose or broken battery connections.
8. Loose wire connection at coil, battery or plug between ignition sensor and module.
9. Spark plug cables in bad condition and shorting, spark plug cable connections loose,
or cables connected to wrong cylinders.
10. Ignition timing incorrect due to faulty ignition coil, ignition module, or sensors " Manifold Absolute Pressure" "Camshaft Position Sensor" "Crank Position Sensor" "Brake Apply Sensor
11. Engine lubricant to heavy ( winter operation )
12. Sticking or damaged valves or push rod wrong length.
13. Primary cam sproket spline sheared or missing spacer.
Good luck

Btw, I’m available to help over the phone in case u need at

Jan 18, 2014 | 1993 Harley Davidson XLH Sportster 883

1 Answer

Yamaha ttr250 cranks but wont start

Hi, Anonymous and the usual suspects are:
1. Fuel tank empty.
2. Fuel supply valve/petcock turned off.
3. Fouled spark plugs.
4. Engine flooded as a result of overuse of the enricher.
5. Vacuum hose to the fuel supply valve/petcock disconnected, broken, cracked, or pinched.
6. Fuel valve/petcock or filter clogged.
7. Fuel line to the carburetor or throttle body pinched or kinked.
8. Carburetor float stuck.
9. Fuel injectors clogged.
10. Severely discharged or damaged battery you need 12.5 volts or better and be able to pass a load test if necessary.
11. 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.
12. Loose or corroded wire connection at the coil, battery or plug between ignition sensor and CDI box.
Spark plug cables in bad condition and shorting check for leakage in the dark, cable connections loose, or connected to the wrong cylinders.
13. Ignition timing incorrect due to a faulty MAP, CKP, O2, TPS, sensors.
14. Faulty neutral, clutch lever, or kickstand safety switch.
15. Faulty fuel pump or fuse or relay.
16. Faulty CDI box.
17. A stuck bent or burnt valve.
18. Tip over sensor needs a reset.
19. Check for engine trouble codes.
For more information about your issue and valuable "FREE" downloads that you will need please click on the blue links below. Good luck and have a wonderful day.
Bike fires and tries but won start
Troubleshooting bike that will crank but won start Yamaha TTR250L Service Manual
OEM parts for Yamaha
Yamaha TT Owner Manual

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Jul 23, 2012 | Yamaha TT-R 250 Motorcycles

1 Answer

What is the standard air mixture setting ? and the needle position ? Yamaha ttr250 2004 bike runs on choke but when you turn it off bike cuts out like it runs out of fuel

Hi, You have a closed mainjet (need cleaning) as for idling you must screw in all the way and then unscrew 2 turns (that's a standart) and then you only have to do minor adjustments.
As for the needle position they all work the highest grove you set the more fuel to your engine. Start from the lowest, test the bike for power and rpm's and adjust from there
Good luck

Sep 16, 2011 | 2004 Yamaha TT-R 250

1 Answer

Timing for a yamaha TTR250 dirt bike?

Hi, Duckin8 for this scenario you will need your service/owners manual if you can't find the best tool you ever bought for your Yamaha, despair not, for a mere zero $0 you can download another one. For more information about your issue and valuable "FREE" downloads that you will need please click on the blue links below. Good luck and have a wonderful day.
URGENT TTR250 timing
Timing for yamaha TTR250 dirt bike Google Search
Yamaha TTR250L Service Manual
OEM parts for Yamaha
Yamaha TTR250M Owner Manual

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Apr 25, 2010 | 2004 Yamaha TT-R 250

3 Answers

I have a 1994 Yamaha TTR250, bike was running fine but all of a sudden developed a misfire. Engine will start but misfires and will not get full revs. When I open the throttle the revs try and increase but...

sounds like you did everything you could but it does sound like there's only one option left and that's the CDI
good going i"d like a response feedback on this if you got time,,,thanks.

Oct 04, 2009 | 2002 Yamaha TT-R 250

1 Answer

Hello, I have a 1997 TTR 250 which had it's key ignition removed recently when someone tried to steal it. Could you please tell me if any Yamaha motorbikes have a compatible ignition? Thank you very much...

I am not sure what year TTR250 you have. In the heading it says 2002, in your text you say 1997. Yamaha didn't import the TTR250 into the US in 1997 so if you have a non US model, I can't help you. I can tell you that if you have a 99 or later, all TTR250's use the same key switch, so any key switch off of any TTR250 will work. Unfortunately, that key switch (4GY-82510-10-00) is not used on any other model in the Yamaha line up.

Oct 02, 2009 | 2002 Yamaha TT-R 250

1 Answer

Spark plug number

The stock plug for your bike is NGK- DP8EA-9

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Jul 05, 2009 | 1987 Yamaha FZR 1000

1 Answer

Yamaha trx850 bike stopped then restarted no problem following week stopped again this time would not restart--no spark at all been in bike shop for 2 weeks they cant find anything wrong

If they find nothing wrong then the problem is obviously intermittent and can be very hard to find. Check the operation of the ignition switch and all kill switches with a volt ohmmeter. Check the wiring harness. Did a wire come unplugged? Are all wires clean and with solid connections? Any abraded or pinched wires? Is the bike in neutral and the neutral light is lit up? If no neutral light, check the neutral switch and neutral wire connection.
The usual source of intermittent loss of spark is the side stand kill switch. It kills the engine so that you don’t start out with the side stand down. Check for a broken wire at the switch or coupler. Get a service manual and check out the electrical section. Some bikes have a diode controller integrated into the turn signal relay. Try moving the kill switch by hand. If that doesn’t work then wire a jumper around the switch to bypass it. If that doesn’t work, check out the relay.The dealer would / should have load tested the various ignition components. I will assume the ignition system is okay. Check the battery and fuses. Install a new set of stock spark plugs.

Jun 12, 2009 | 1997 Yamaha TRX 850

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