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Discussion in 'Motorcycle Tech Talk' started by FXR MAN, Jul 21, 2010.

  1. FXR MAN

    FXR MAN New Member

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    Hello everyone

    I have an 86 FXR and it cut out when I'm on the FWY and back fires I just let go to the throttle and then keep going and at idle it turns off.

    thanks for any help
    FXR MAN, Jul 21, 2010
    #1
  3. hotroadking

    hotroadking Super Moderator Staff Member

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    bad main breaker - power cuts off, then comes back, replace breaker, check
    battery, check ground cable and connections be sure tight.
    could be bad ignition/coil

    Do you have Service Manual?
    hotroadking, Jul 22, 2010
    #2
  4. FXR MAN

    FXR MAN New Member

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    Thank you Hotroadking

    I had just put in a new battery too weeks ago. the coil I'm not share how to check but I'll take a look at that and the coil. and look in the the breaker today thanks and I'll let you know.:rolleyes:

    Attached Files:

    FXR MAN, Jul 22, 2010
    #3
  5. JohnnyBiker

    JohnnyBiker Well-Known Member

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    That is a nice looking bike. How many miles?
    JohnnyBiker, Jul 22, 2010
    #4
  6. FXR MAN

    FXR MAN New Member

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    I have to go work right now. taking the bike. I'll let you know tomorrow how many miles I do have a lot. and yes I do have a service manual.
    FXR MAN, Jul 22, 2010
    #5
  7. hotroadking

    hotroadking Super Moderator Staff Member

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    Good thing with the SM, you can at least trace things back.

    The main breaker on HD's can get old and cause your issue,
    HD replaced the breaker a few years back with a 40Amp Main fuse.

    Typically though unless the breaker has taken a dive something else
    would be tripping it or off.the key is that you just did some work, and
    that is where I would start, typically my problems are created by something I
    did...
    hotroadking, Jul 23, 2010
    #6
  8. FLHTbiker

    FLHTbiker Moderator Staff Member

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    Been there and relate to that.
    FLHTbiker, Jul 23, 2010
    #7
  9. sarge7

    sarge7 New Member

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    Borrow a buddys coil and try it - if the problem stops you'll have yer answer.
    sarge7, Jul 23, 2010
    #8
  10. FXR MAN

    FXR MAN New Member

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    I went to a loco bike store and got a intake manifold kit and a main breaker 30amp and don't have a buddy with a Harley to try his coil. Going to work on the bike on Saturday.:banghead:
    FXR MAN, Jul 23, 2010
    #9
  11. FXR MAN

    FXR MAN New Member

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    The kit I got was the wrong one. so I went to the Harley dealer and order the right parts. I glad I took it apart the intake parts were cracked. I should get the parts in on Friday. That sucks a week with out the bike.
    FXR MAN, Jul 26, 2010
    #10
  12. chucktx

    chucktx Moderator Staff Member

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    ya, that does suck, but at least you found your problem......let us know how it goes...
    chucktx, Jul 26, 2010
    #11
  13. FXR MAN

    FXR MAN New Member

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    I changed the Intake parts and it was still doing it ( shouting off and back firing ) I've been working on my bike all week I've change the coil and the main breaker and it's still doing it. So I started going threw all the wiring and I saw the wiring coming out of the sensor plate looked a little crimp so I took off the clamp but the wires were good and I did find a wire coming out of the Voltage Regulator grounding out, fixed that. I took apart the starter button on the handle bars and everything looked good. :banghead: and I even checked the wires behind the coil. What ever I did it seems to have slowed it down because it not doing it as much. I fix a couple of oil leaks and the front fender. this week end I'm doing to pull off the gas tank and clean it.

    SO I'M STILL LOOKING FOR THE PROBLEM.

    Attached Files:

    FXR MAN, Aug 12, 2010
    #12
  14. cowboy

    cowboy Moderator Staff Member

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    When you have the tank & seat off double check all the wires under there ,you just might have one or two rubbed raw from age
    cowboy, Aug 12, 2010
    #13
  15. FXR MAN

    FXR MAN New Member

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    OK thank you I will check. later I want to check the Ignition switch :banghead:
    FXR MAN, Aug 13, 2010
    #14

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