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  • bikerphil Posts: 2
    melbourne
    Stock Poster bikerphil
    04 Dec 2017 08:32 PM
    hi y'all

    Got a 2008 street bob - 93 Cubic inch, 70,000k's
    Top end sounds like a sewing machine and rattles like a good un.  Dealer says this is normal and recommended I went back to organic oil from the syntheic stuff to quieten it down a bit..  Thing is its driving me bonkers, all i can hear is the friggin rattling every time I ride .

    Is this normal?  or is  the dealer pulling my chain?
    As theres no adjustment on the top end ( hydraulic lifters and all that)  is this just the result of an engine  thats done 70k's  and I need to think about new rockers/lifters etc.

    What do you guys think?

    Phil

  • fatbat Posts: 2372
    East Coast
    Motor Head fatbat
    04 Dec 2017 08:39 PM
    Are you on the original lifters? I'd get a second opinion from a reputable Indy. Lifters should be changed before 70,000 kms 
  • Hot and Heavy Posts: 1250
    Hobart.
    Performance Poster Hot and Heavy
    04 Dec 2017 08:43 PM
    I swear by these things. http://www.rockout.biz
  • speedzter Posts: 1582
    The 'Rat
    Motor Head speedzter
    04 Dec 2017 09:16 PM
    Don't go back to the dealer, find a good independent mechanic.
    Get them to check the valve train/cam chest for issues.
    Some noise is normal, but it sounds like yours is excessive.
  • rodders Posts: 5275
    The Place To Be.
    Forum Legend rodders
    04 Dec 2017 09:25 PM
    Just fit a louder exhaust.
  • JFE Posts: 791
    NSW
    Performance Poster JFE
    04 Dec 2017 09:41 PM
    What synthetic oil are you running? My 103 engine was quieter when I swapped HD Syn3 out for Mobil 1 V-Twin. Doesn’t smell as good, but I can live with that.
  • markwoumla Posts: 1408
    Performance Poster markwoumla
    04 Dec 2017 10:25 PM
    Posted by speedzter on 04 Dec 2017 09:16 PM
    Don't go back to the dealer, find a good independent mechanic.
    Get them to check the valve train/cam chest for issues.
    Some noise is normal, but it sounds like yours is excessive.

     The Above !!!!


  • bikerphil Posts: 2
    melbourne
    Stock Poster bikerphil
    04 Dec 2017 10:41 PM
    thanks guys

    yes original lifters , rods and top end - nothing has been changed.

    Re the oil question - I was using harley synthetic for about 2 yrs, but now gone back to Harley organic.

    @Mark
    dunno if im just being pedantic or not, Ill get a 2nd opinion


    cheers all

  • tussuck Posts: 1270
    Melbourne
    Performance Poster tussuck
    05 Dec 2017 02:17 PM
    Nothing wrong with the OEM gear, although when you do replace the lifters replace them go with quality like Jims or S&S.
    Noise top ends a re normal with high lift cams - although it should not be as bad as you make it sound
    Stay away from the Synth oil as I found my Evo started to leak oil and sound like a damn sewing machine when i swapped over to it.  Dino oil is definitely quieter!
    Often as not the cure is to slightly over tighten the pushrods by a turn or two.
  • fatbat Posts: 2372
    East Coast
    Motor Head fatbat
    05 Dec 2017 07:00 PM
    But if the engine is stock it won't have adjustable pushrods 
  • tussuck Posts: 1270
    Melbourne
    Performance Poster tussuck
    06 Dec 2017 10:59 AM
    Good point.
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