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Pinging Road King

Discussion in 'Motorcycle Tech Talk' started by cfatrat, Feb 15, 2007.

  1. cfatrat

    cfatrat New Member

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    I took my bike to the stealer for a cold start issue and 435.00 later I went on a 100 mile ride and it drove me crazy pinging. I called the professional stealer mechanic and they just couldn't explain why this bike would ping. The reciept showed the addition of a SE stage 1 breather kit and a carb rebuild.

    Now how in the #### could this create a pingning issue and then they say that I must be hearing things because this bike will not ping due to the electronic module. I think that is bull. I have built hot rods for years and any gearhead knows that a ping is associated with ignition timing. My question is could the addition of a free flowing breather trick the module into advancing the timing this much? When I took it in it already had Rinehart true duals and a stock breather. Whats up with this combo
    cfatrat, Feb 15, 2007
    #1
  3. kenfuzed

    kenfuzed Administrator Staff Member

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    Too much advance and/or too lean, maybe both. Tell them to do it again. Might also be a vacuum leak or intake leak when they pulled the carb.
    kenfuzed, Feb 15, 2007
    #2
  4. cfatrat

    cfatrat New Member

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    I am going to pull the carb this week and check for an intake leak. I also purchased an adjustable ignition and a thunderslide set-up. I hope this will cure the ailment.
    cfatrat, Feb 18, 2007
    #3
  5. mwelych

    mwelych Active Member

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    The octane rating of the gas you use could also cause pinging. That may not be the issue, but if you do use a lower grade fuel, try upping it up one or two grades higher. I actually go with 93 octane. I have a ping with 87.:)
    Last edited: Feb 18, 2007
    mwelych, Feb 18, 2007
    #4
  6. ReeseSS

    ReeseSS New Member

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    You mention a carb rebuild, when they changed the air and you are getting better flow now, if they did not rejet the carb or not correctly, then most likely you are running too lean. While your are checking things out, see if the metal plug is still in the mixture screw access, if so should pop it out and adjust that also.
    Last edited: Feb 19, 2007
    ReeseSS, Feb 19, 2007
    #5
  7. kenfuzed

    kenfuzed Administrator Staff Member

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    Could be as simple as something lodged in the mixture passage or the tech screwed in the mixture screw too tight.

    Before bolting things on I'd get back to basics. If you have internal problems with the carb then adding the thunderslide could just compound things. The adjustable ignition is good as long as your fuel delivery is solid.

    JMO, but I would seriously look at getting the carb back in shape and then do one upgrade at a time. Trust me on this one, I rebuild a carb per week and half come in packed with thunderslides, dynojets, yost tubes, and adjustable needles. All of which arrive with the same complaints. The first thing I do is throw all that junk in the trash and start with fresh original parts.

    Just my 2 cents.
    kenfuzed, Feb 19, 2007
    #6
  8. hotroadking

    hotroadking Super Moderator Staff Member

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    I agree you could increase the problem by making those changes.

    You need to determine the problem first

    a lean condition from leaking seals, improperly tuned carb etc.

    Usually the main on a stock carb with a stock or stage 1 motor is adequate, going up on pilot maybe 1 size, biggest issue is usually setting the air mix screw properly.

    I would take some carb cleaner and once the motor is running and warm spray it around the seals from the left side of the motor. If you get a change in idle you know you have a leak, be sure the "straw" is on the can you use to direct it to the seals, front, back and carb.

    Check vac lines for leaks.

    set air mix screw.

    Before you mess with anything else.
    hotroadking, Feb 20, 2007
    #7
  9. cfatrat

    cfatrat New Member

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    I already have an intake seal kit and each of you have a valid point. I'll check the vacuum first. I'll try it in a couple of days.

    As for the thunderslide, is it a waste of money?
    cfatrat, Feb 20, 2007
    #8
  10. kenfuzed

    kenfuzed Administrator Staff Member

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    Thats just my personal opinion, others swear by them. The biggest complaint I've heard with them has to do with poor idle and severe decel popping. Because that slide is so light it tends to bounce or shutter up and down when trying to stabilize. The only advantage is a quicker response when cracking the throttle wide open, which makes it great for racing and bar hopping. Mileage suffers since you need to adjust the mixture far more richer to keep from running too lean. If that's your aim then it's probably not a waste of money.
    kenfuzed, Feb 21, 2007
    #9
  11. cfatrat

    cfatrat New Member

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    I checked the bike out today and as luck would have it, there is an intake leak at the rear cylinder. I hope to pull the carb this weekend and check it out.
    cfatrat, Feb 22, 2007
    #10
  12. chucktx

    chucktx Moderator Staff Member

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    glad that you have found a problem....keep us posted on the progress!!!
    chucktx, Feb 23, 2007
    #11
  13. cfatrat

    cfatrat New Member

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    Well, I replaced the intake gaskets and fired it up, but I still have a leak. I guess I'll take it back off and check a little closer. Maybe one of the flanges is warped. Go figure...

    Cfatrat
    cfatrat, Feb 25, 2007
    #12

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