Knock knock vibe!

Discussion in 'Transmission' started by mababcock88, Apr 8, 2009.

  1. mababcock88

    mababcock88 New Member

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    I have a 2003 Softail Standard EFI. It is about 500 miles from the 20,000 service. I have this weird vibe sometimes, it can only be felt at about 15 miles or less, you can notice it the most when at a stop. Some times it is accompanied with a knock. I have adjusted the clutch, all the fluids are good. When I put the bike on the stand, start it, put it in first with with clutch lever pulled in, the rear tire will start to spin. The knock feels like it is coming from the primary. Does anybody have any ideas on what is going on?
     
  2. TQuentin1

    TQuentin1 Well-Known Member Staff Member Moderator

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    Rear tire spinning is not a problem. You have hydraulic drag of the fluid between the disks being spun by the drive disks and "pulling" the driven disks. With the tranny in gear, it will turn the rear wheel.

    The knock and shudder or vibration is more disconcerting. I would open up the primary and check that the compensator nut is tight, and that the primary chain tensioner is in good shape. While you have the primary cover off, inspect the drive and driven sprockets to make sure all the teeth look OK.

    Also inspect the drive belt to make sure all the teeth on the drive belt look good.

    I think that bike should have the "B" engine. I am not experienced with all that mechanism in order to know what can go wrong with the balancers. Glider or one of the other guys here with hands on experience should weigh in on what to look for there.

    TQ
     
  3. Bud White

    Bud White Well-Known Member Retired Moderators

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    usually if the balancers are out of time on any engine it will shake so hard as to be undrivable this was car enignes i saw it in when they would break timing belt and guys would time the balancers wrong it would make your vision blury it was so bad.. i would think it would be 10 times worse sitting on it like the harley
     
  4. mababcock88

    mababcock88 New Member

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    I have this spacer on order for the compensator nut, part# 24033-70. I guess it is a problem with them backing off for the 2003-2006 engines. There is a service bulletin about it. I am going to give it a whirl and see how it goes. I will let you know how it goes as soon as I get this spacer.
     
  5. mababcock88

    mababcock88 New Member

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    It is all fixed. It was the compensator nut that had backed off. I cleaned it all up, put the spacer on and torqued it. All good now. Ready to ride.
     
  6. Bud White

    Bud White Well-Known Member Retired Moderators

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    Glad ya found it and got it fixed