Should I be concerned about this ?

Discussion in 'Touring Models' started by scrinch, Jul 28, 2009.

  1. scrinch

    scrinch Active Member

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    Sometimes when the engine is under load, like going up a slight grade in 5th (01 RKC 5000 miles) I get a noise from the front of the engine that sounds like a chain clanking.. I thought it might be the primary but that is adjusted correctly. Anyone tell me what this noise might be ?
     
  2. Bud White

    Bud White Well-Known Member Retired Moderators

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    sure its not the ping of spark knock?
     
  3. DonT1985

    DonT1985 Member

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    It sounds like a spark knock. The fuel we get today is extremely bad. You know the 10% Ethenol. Allways use the best grade offered (high test) and shift down a lot. Take the load off the engine. Remember the new engines are roller motors. They do not like low RPM load.
     
  4. scrinch

    scrinch Active Member

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    I kinda wondered if that might be it, but it doesn't do it all the time on the same tank of gas. I always use at least 91 octane. and shift down when I hear it. Now I wonder if I should use an octane increaser also.??
     
  5. R. Lewis

    R. Lewis Senior Member Retired Moderators

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    Since your using 91 oct. - IMO - I wouldn't think you would need a octane booster.
     
  6. NEWHD74FAN

    NEWHD74FAN Experienced Member Retired Moderators

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    You may be running a little lean in the midrange...perhaps raise the needle 1 notch or add a washer if you have a carb? Does it "rattle" or ping if you give it full throttle?
     
  7. nolafishr

    nolafishr Active Member

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    Use the 91-93 Octane Gas and like the others said, you may need to downshift when you hear/feel this happening with the Engine/Bike.
     
  8. glider

    glider Veteran Member

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    That sounds like pinging. Try an octane booster or a different brand of fuel and downshift to 4th in that situation. All the above should work but it is a destructive thing to have happen. Try the octane booster first and if it eliminates the noise, a modification of driving habits is in order.
     
  9. scrinch

    scrinch Active Member

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    Thanks for the input. Off to the store.. Of course thinking about it my engine is under more load than most with sidecar drag and most of the time a woman and dog as passengers. Man, don't let her know I said that!!!
     
  10. R. Lewis

    R. Lewis Senior Member Retired Moderators

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    I understand the "different brand of fuel" but not the octane booster ??? If your running 91 octane - why the need for the booster? Now I might go for a fuel injector/carb cleaner -- but a booster?????