Question about 2005 Yamaha TTR 90 E

2 Answers

Yamaha ttr90 no spark

I have a ttr 90 yamaha dirt bike it has electric start and i have no spark. my coil is good and i have power from the stator. all my fuses are good and all my wirers are conected right. any ideas?

Posted by Anonymous on

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2 Answers

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  • Expert
  • 85 Answers

Test the stator those go in them quite a bit

Posted on Jan 01, 2017

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  • Yamaha Master
  • 43,010 Answers

Hi, Anonymous and the usual suspects are:
1. Fouled spark plugs.
2. Severely discharged or a damaged battery, should have 12.5 volts or better and be able to pass a load test if necessary.
3. 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.
4. Loose connection at ignition coil or plug between ignition sensor and CDI box.
5. Spark plug cables in bad condition, shorting / leaking, spark plug cable connections loose, check for spark leakage in the dark.
6. Faulty ignition coil, pick up coil, trigger coil or CDI box testing needs to be checked with an ohmmeter at 70 degrees Fahrenheit
7. Faulty safety switches clutch, kickstand, neutral, off/on etc.
8. Faulty ignition switch.
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.
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Posted on Jan 01, 2017

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6 Suggested Answers

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  • 2 Answers

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Posted on Jan 02, 2017

  • 8 Answers

SOURCE: 200 YAMAHA V-STAR 650 HAS

IT sounds like it is the pickups not working (.telling it to spark) if not then it will be CDI UNIT OR ENGINE GENERATOR COILS

Posted on Nov 16, 2008

fastboyz
  • 674 Answers

SOURCE: My yamaha ttr90 wiring

you should be able to repair the harness just solder the wires and heatshrink the connection
the new harness costs
see pic
WIRE HARNESS ASSY
(5HN8)299268-001 $6.85

Posted on Dec 03, 2008

  • 66 Answers

SOURCE: i have a 2004 ttr yamaha 225 dirt bike and theres no spark too p

check stator ac output 1st.check pulse coil next. find cdi box to try next.other possibles- ign coil, try unscrewing plug cap & trimming about 1/4" off coil wire. check spark w/ cap off. finally could be wiring.

Posted on Feb 16, 2009

  • 3567 Answers

SOURCE: Honda CRF150F will not start

ALWAYS have a fire extinguisher on hand when working on carburetors.
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 ). Flush out the gas tank if needed.

Drain the carburetor. There should be a screw on the lower side or bottom 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.
< < READ CLOSELY > >
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. Post a comment to get back to me.

A “very helpful” rating on this answer? Thanks!
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Posted on Jul 03, 2009

  • 3 Answers

SOURCE: 2000 yamaha ttr90 fuel leaking out overflow tube

your float is stuck take carburator off and clean wiggle float and it shouldnt leak gas anymore

Posted on Aug 27, 2009

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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
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Hi, David_medley and the usual suspects are:
1. Fuel tank empty.
2. The fuel tank has old dead gas.
3. Fuel tank bottom contaminated with ethanol sludge, dirt, water, rust, etc.
4. Fuel supply valve/petcock turned off.
5. Fouled spark plugs.
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8. Fuel valve/petcock or filter clogged.
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11. Fuel injectors clogged.
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I have a 2004 ttr yamaha 225 dirt bike and theres no spark too p


check stator ac output 1st.check pulse coil next. find cdi box to try next.other possibles- ign coil, try unscrewing plug cap & trimming about 1/4" off coil wire. check spark w/ cap off. finally could be wiring.

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