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Time To Tear Down

Discussion in 'Motorcycle Tech Talk' started by JohnnyBiker, Sep 8, 2014.

  1. JohnnyBiker

    JohnnyBiker Well-Known Member

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    Yep, it is time that I take the top end of Sportster apart and start investigating what the frigging noise is that just won't go away. The more I hear it (and it get worse and more frequent) the more I start to gb I nm that I am having issues in the front cylinder. It kind of sounds like valve float or a guide starting to g I bad. GRRRR!
  2. baggerpaul

    baggerpaul Well-Known Member

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    valve float the motor would fall flat on its face like you lost 50 hp if it was a guide going bad you would be using oil like mad . and smoking like a mfr! valve seat it would be missing and again lost alot of power all of these would be constant noise and loud other than the guide . i would say its time to post a video so we can here this noise and help with the diagnosis . before you tear the sob apart and then i have to fly to minesooota and kick my good friend in the balls
  3. hotroadking

    hotroadking Super Moderator Staff Member

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    Or freeze your balls off


    Sent from my iPhone using Tapatalk
  4. baggerpaul

    baggerpaul Well-Known Member

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    That is not going to happen again next time my ass goes to visit its gonna be summer thats for sure !ill never forget ol johnny boy saying its grest in the spring we have nice weather you will love it. ya ok !it was a fn snow storm that morning when i got up to have a sm oke ran inside cuz my head was on fire it was so cold!lmao
  5. JohnnyBiker

    JohnnyBiker Well-Known Member

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    There us something wrong. Trust me on this. I would post a video but it doesn't do it until warm and at 55mph. Would be difficult to hear.
  6. JohnnyBiker

    JohnnyBiker Well-Known Member

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    And it should have been nice out. That was weird weather for that late in April. Until it happened again this year.
  7. JohnnyBiker

    JohnnyBiker Well-Known Member

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    P.S. Grow some hair then you wouldn't have to worry about your head getting cold. :D LMFAO
  8. joshbob

    joshbob Well-Known Member

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    I remember the time I thought I had something going wrong with the top end of my rear cylinder. Sounded like a valve or something in the rocker box. Turned out to be a broken rear tab on the gas tank rattling against the backbone of the frame :banghead.
  9. JohnnyBiker

    JohnnyBiker Well-Known Member

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    Nope not it. I checked.
  10. joshbob

    joshbob Well-Known Member

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    Took me at least a week to find it LOL. Listen to it with a stethoscope - it might help to pinpoint where the trouble is.
  11. baggerpaul

    baggerpaul Well-Known Member

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    1 cant grow hair any more.lol 2 I heard that story before about it being nice this time of the year. 3 take a small rubber or leather mallet and tap around the frame work of the bike including all attachments and accessories. Of course stay off the paint work .but you knew that . Include fork tress and bars . Harmonics make shit sound like engine noise.
  12. JohnnyBiker

    JohnnyBiker Well-Known Member

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    All is good there bud. I did that right when I got everything back together. Nothing is loose.
  13. baggerpaul

    baggerpaul Well-Known Member

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    Well I dont believe ya .I rode that bike and thatotor was tight as hell .ill put money on its not in the motor .ha!
  14. Roadster guy

    Roadster guy Well-Known Member

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    Yes, but a noise in the motor somewhere that no one else can hear is also a good excuse to take it to the next level. To get rid of the noise I had to port the heads, get a bigger cam,...
  15. hotroadking

    hotroadking Super Moderator Staff Member

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    generally you find the loose nut is behind the bars... while riding...

    Don't you have a shop you trust for tuning and such that did a lot
    of the work on the RG?

    I'd take it there and have them listen before I pulled the engine apart
    get a professional diagnosis.
  16. JohnnyBiker

    JohnnyBiker Well-Known Member

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    If this were the case then I would here this noise at all speeds and I'm not.
  17. JohnnyBiker

    JohnnyBiker Well-Known Member

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    Can't help that you don't believe me. Nothing is loose.
  18. baggerpaul

    baggerpaul Well-Known Member

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    Im just busting your chops if you say its making noise and you hear it after it warm then something is expanding and rattling . whens the last time you adjusted the valves maybe you have a push rod thats a little worn and as it gets hot clearence is being created at the rocker at higher rpms its hard for the lifter to take up slack check them
  19. hotroadking

    hotroadking Super Moderator Staff Member

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    Or a lifter that's bad

    Again ride it over to the shop that synod and tuned the RG

    See what hey say


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  20. joshbob

    joshbob Well-Known Member

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    Excuse my low tech self for buttin' in, but I think I'd do what HRK recommends and take it to the shop. They have the diagnostic equipment and should be able to find out what's causing the problem.

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