Question about 1987 Honda CBR 600 F(1)H

6 Answers

Cbr600f-h1987 will not run

Oike wont fire up replaced fuel r elay switch 3times no luck have now replaced fuel pump and another relay still wont fire up tried bridging ywo wires without relay pump will work without bridging relay will not work now at wits end need help please

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  • mulroy08 Apr 12, 2009

    no that does not answer my question= my bike will not run i have rplaced fuel relay and fuel pump still wont run

  • mulroy08 Apr 12, 2009

    sorry this does not answer the question when i bridgewires that go to fuel relay fuel pump works when fuel relay is fitted pump will not run and wont start either way

  • mulroy08 Apr 13, 2009

    fhis does not answer question either i am so very sorry.there is only one live wire going to fuel relay and only time i get power to pump is when i bridge relay i have had 3 relays and bike still wont start also checked battery is fine

  • mulroy08 Apr 14, 2009

    answer does not help engine is good

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If your bike is carburated check the vacum hoses if it is fuel injected you could have a problem with the cdi box

Posted on Jun 19, 2009

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Hi and welcome to FixYa,

Let's try process of elimination. I would address the fuel cutoff relay. Initially, postback with below requested information:

  • the wires that you are bridging are the black and black/blue;
  • how many terminals are there in your fuel cutoff relay, 4?

Good luck and thank you for using FixYa.

Posted on Apr 14, 2009

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Hi,Friend stanby for a while i'll sent you how

Posted on Apr 14, 2009

  • Joseph Baculan
    Joseph Baculan Apr 14, 2009

    Friend, You need to perform change oil and engine check up. Go to the nearest repair center to avoid further damage.It is the best way to keep it work again.

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U have no fuel pressure correct? and u are sure of this? Is the spark ok and u have confirmed this? do you have two 12 volt sources to the fuel pump relay? one is for the closing coil of the relay the other is the 12 volt supply for the pump, have u tried jumping the relay? is the oil pressure switch ok? if the oil pressure switch is defective u will get no fuel pressure.

Posted on Apr 12, 2009

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Hi,
If the voltage is too low in the battery, the magnetic field generated in the coil of the relay will not be strong enough to close the contacts. You know the pump works...
Have you got a meter to measure voltage? Check the battery first...should be almost 13 volts fully charged. If it drops under the load of the fuel pump below 10 volts get a new battery



The wire is soldered inside the pump. These leads can come unsoldered if the voltage is too low. I don't know how much you know about electricity, so let me tell you one basic fact... When voltage drops amperage (or draw) increases. The heat from the increased amperage melts solder, burns wires, and damages other sensitive electronics. I suggest getting a meter that reads dc volts and ohms.
With the voltage meter you can test to see what the voltage is at your battery with the bike off, during starting, and while running. The answers to those three tests can tell you a lot about your battery, charging system, and starter.
The ohm function can be used to test continuity or path for electricity to travel. You should have continuity if you measure across the leads of the pump.

Posted on Apr 12, 2009

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Did you get any water/mosture in the engine

Posted on Apr 12, 2009

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Posted on Jan 02, 2017

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