Question about 1994 Honda CBR 900 RR Fireblade

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Got problem with my 1994 Honda cbr900rr , 1 spark plug always damaged with the damage occurred an average of once a month.. everytime that plug got damaged, I will change a new plug into it, but about a month later it got damage again?...it only happen to no 1 plug at right side, while the other 3 plugs works properly... please advise... Thank you.

Posted by Anonymous on

  • Anonymous Jan 03, 2011

    yes... the damage occurs during the bike is stall untouch for atleast a week, when i try to start the bike, the engine runs with only 3 plug's working...i have checked with mechanic and the plug specification is right...so what should i do now?..thanks

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It almost sounds like your piston is slightly hitting the spark plug by your description. Does the bike stall once the damage occurs and how extensive is it? If thats the case, are you sure your using the exact plug that is specified for that bike? If you go to a shorter style plug that might solve your problem. Its a place to start.

Posted on Jan 03, 2011

Testimonial: "very fast response...very helpful...thanks"

  • Anonymous Jan 03, 2011

    yes... the damage occurs during the bike is stall, when i try to start the bike, the engine runs with 3 plugs only...i have checked with mechanic and the plug specification is right...

  • Anonymous Jan 03, 2011

    yes... the damage occurs during the bike is stall untouch for atleast a week, when i try to start the bike, the engine runs with only 3 plug's working...i have checked with mechanic and the plug specification is right...so what should i do now?..thanks

×

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Hi, Anonymous and the usual suspects are:
1. Severely discharged or a damaged battery should have 12.5 volts or more and be able to pass a proper "LOAD" test if necessary, you may have a cursory reading of 12.5 volts or more but little or zero amperage the battery is faulty and must be replaced, AGM batteries fail in this scenario more so than lead acid batteries.
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 contaminated, sticky float, plugged jets.
13. Carburetor vacuum diaphragm torn, cracked, not seated or installed improperly.
14. Multiple carburetors out of sync.
15. Fuel filter clogged.
16. Old or contaminated fuel.
17. Fuel tank vent system plugged or carb vent line closed off.
18. Gas cap diaphragm valve faulty.
19. Vacuum line from intake manifold to fuel valve is broken, cracked, pinched, or missing.
20. Carburetor controls misadjusted.
21. Incorrect valve timing.
22. Valve springs floating, weak, or broken.
23. Damaged intake or exhaust valve.
24. Incompatible performance parts.
25. Control module may be in "LIMP" mode
26. 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.
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