How's my CX sound
Close
    
    
Page 1 of 2 1 2 LastLast
Results 1 to 10 of 15
Like Tree2Likes

Thread: How's my CX sound

  1. #1
    Senior Member blivy's Avatar
    Join Date
    May 2011
    Location
    Athens, Georgia
    Posts
    863

    How's my CX sound

    Greetings folks.
    Would y'all mind listening to my CX and tell me what you think?

    Listening for problems on a bike can make me paranoid, but I do believe I'm hearing something that sounds a bit unusual.

    Background: adjusted valves a few weeks ago (did timing adjustment too).
    Probably the 5th time I've done this on the bike. Followed manual to make sure I was on the TDC of the compression stroke (per Wiki).

    Noticed a slight sound sometime after the adjustment.
    I'm assuming I'm either:
    A) paranoid and hearing things, or
    B) involved in another case of Human Error, and need to readjust valves.

    Thoughts?
    Thanks,
    Blivy

    1979 CX500 Custom, Athens, Georgia
    Rebuilt Left Cylinder Head (2011)
    Rebuilt Starter (2011); Re-enameled tank (2011); Rebuilt Carbs (Larry method) (2012);
    Triple by-pass performed (2012);
    Upgrade to G8 stator and Ignitech (2012);
    Rebuilt oil pump and new oil chain (2012);
    Stripped and painted frame and wheels(can job) (2012);
    Re-greased/lubed rear drive and rear drive splines (2012);
    8 cell lithium Ballistic battery (2014); Upgrade to dual pot brakes with SS line (2014);
    New Shinko 230 tires (2014)
    New EBC clutch springs (2015); Rebuilt clutch cable assembly on clutch cover case (2015);
    New throttle, clutch, and choke cables (2015)

  2. #2
    Senior Member Thumper's Avatar
    Join Date
    Mar 2012
    Location
    Eden Prairie, Minnesota
    Posts
    2,311
    Get your idle down to 1100 rpm.
    Then re-do the Youtube.
    chocolatelvis likes this.
    Riding season ending, heated garage season beginning.

    Current: '03 Kawasaki ZZR1200, '84 Kawasaki GPZ900R, '84 VF500F Interceptor, '83 GL650I, '81 CX500C, '82 GL500I project, '81 CX500C basket case, '79 CB750LTD, '85 CB700SC, '01 Kawasaki ZRX1200R, '72 Yamaha G7S

  3. #3
    Senior Member purplecx500's Avatar
    Join Date
    Jul 2013
    Location
    Southern California
    Posts
    1,343
    viewed ur post problem deef in 1 ear an knardly heer in the other.

    so sounded great as if !!

    Hearing aids just make the noise louder not clearer.

  4. Remove Advertisements
    CX500Forum.com
    Advertisements
     

  5. #4
    Senior Member
    Join Date
    Jul 2014
    Location
    London, UK
    Posts
    193
    I could be wrong, but there does seem to be a slight clatter coming from the left head. It could be the heads knocking, though to be sure there is something, take a stethoscope or a big 'ol screwdriver and have a listen (put the blade to the engine and handle to your ear) and have another listen.
    Last edited by Rigal; 08-04-2015 at 06:30 AM.
    Honda CX500EC trike front end, MK1 escort rear axle.
    Kawasaki Z650 B1

    Willing IT Technician/Installation Technician to trade my skills for help with the trike!

  6. #5
    Senior Member blivy's Avatar
    Join Date
    May 2011
    Location
    Athens, Georgia
    Posts
    863
    Rigal,
    That's what I was hearing as well. To my ears, definintely clatter onthe left head.
    I'll test in a bit and post later.
    Thanks,
    Blivy
    1979 CX500 Custom, Athens, Georgia
    Rebuilt Left Cylinder Head (2011)
    Rebuilt Starter (2011); Re-enameled tank (2011); Rebuilt Carbs (Larry method) (2012);
    Triple by-pass performed (2012);
    Upgrade to G8 stator and Ignitech (2012);
    Rebuilt oil pump and new oil chain (2012);
    Stripped and painted frame and wheels(can job) (2012);
    Re-greased/lubed rear drive and rear drive splines (2012);
    8 cell lithium Ballistic battery (2014); Upgrade to dual pot brakes with SS line (2014);
    New Shinko 230 tires (2014)
    New EBC clutch springs (2015); Rebuilt clutch cable assembly on clutch cover case (2015);
    New throttle, clutch, and choke cables (2015)

  7. #6
    Senior Member blivy's Avatar
    Join Date
    May 2011
    Location
    Athens, Georgia
    Posts
    863
    So, I took a big ol' screwdriver and used it to get a better listen of my engine.
    Wasn't quite sure what to look for, so I decided I'd just see if there was anything different from one side of the engine to the other.
    I went from left to right sides at equal points to judge.
    Top of valve covers seemed to be the same.
    Outside side of heads seemed to sound the same.
    Area of head close to intake (connection to carbs) sounded same.
    Area of exhaust (on head, close to flange where exhaust header connects) sounded very different. Left side was much louder and "clattery-ER".

    Does this mean my exhaust valves on the left side are loose and need to be adjusted?

    What are "heads knocking"? Is that something to be (really) concerned about?

    Thanks for all the help.
    -Blivy
    1979 CX500 Custom, Athens, Georgia
    Rebuilt Left Cylinder Head (2011)
    Rebuilt Starter (2011); Re-enameled tank (2011); Rebuilt Carbs (Larry method) (2012);
    Triple by-pass performed (2012);
    Upgrade to G8 stator and Ignitech (2012);
    Rebuilt oil pump and new oil chain (2012);
    Stripped and painted frame and wheels(can job) (2012);
    Re-greased/lubed rear drive and rear drive splines (2012);
    8 cell lithium Ballistic battery (2014); Upgrade to dual pot brakes with SS line (2014);
    New Shinko 230 tires (2014)
    New EBC clutch springs (2015); Rebuilt clutch cable assembly on clutch cover case (2015);
    New throttle, clutch, and choke cables (2015)

  8. #7
    Senior Member blivy's Avatar
    Join Date
    May 2011
    Location
    Athens, Georgia
    Posts
    863
    Update (though not much of one...can't seem to do wrenching during the week).
    A more (engine) knowledgeable buddy of mine told me that since (with the screwdriver to ear test) the valve covers and sides of the heads sounded the same, and that the chatter seemed to only come from the area close to the flange where the header attaches to the head that it could just be a loose connection there.
    He says he's run into this issue before (he teaches an automotive course at a tech college, so he's had some experience).

    I'm gonna try to tighten up those bolts tomorrow and see if that works. I'll post what comes out of this.
    This could make sense, as a couple of weeks ago I had to put a lift under my bike, and unfotunately, that meant the lift was in contact with exhaust pipes. Could've caused some shifting?...
    1979 CX500 Custom, Athens, Georgia
    Rebuilt Left Cylinder Head (2011)
    Rebuilt Starter (2011); Re-enameled tank (2011); Rebuilt Carbs (Larry method) (2012);
    Triple by-pass performed (2012);
    Upgrade to G8 stator and Ignitech (2012);
    Rebuilt oil pump and new oil chain (2012);
    Stripped and painted frame and wheels(can job) (2012);
    Re-greased/lubed rear drive and rear drive splines (2012);
    8 cell lithium Ballistic battery (2014); Upgrade to dual pot brakes with SS line (2014);
    New Shinko 230 tires (2014)
    New EBC clutch springs (2015); Rebuilt clutch cable assembly on clutch cover case (2015);
    New throttle, clutch, and choke cables (2015)

  9. #8
    OCR
    OCR is offline
    Senior Member OCR's Avatar
    Join Date
    Sep 2010
    Location
    Groton NY
    Posts
    2,247
    I believe that I mentioned that on another thread that sounded the same, exhaust leak.
    Past Master, Dryden Lodge #472
    Caroline Lodge # 681
    RAM Fidelity # 77





    '79CX500C

    http://cx500forum.com/mediawiki/inde...itle=Main_Page



    we are all given sh*t in life, but some of us learn to turn it into fertilizer and grow from it, and some us try to fling it on others like monkeys.

  10. #9
    Senior Member blivy's Avatar
    Join Date
    May 2011
    Location
    Athens, Georgia
    Posts
    863
    So, I think it was the exhaust...
    went to tighten up the 10mm bolts that hold the exahust flange on, and found that they were loose. Got them good and snug, Sounded better on the left side afterwards! Problem solved. Thank y'all very much.

    THE PROBLEM IS that i snugged up the bolts on my right exhaust flange too and popped the head off one!
    (I'm normally pretty good about not torquing them down too much, but not today).

    My question is... this is my daily driver (with a very short couple of mile commute). Is there any danger with me riding with a loos(er) right side exhaust flange? It has made a difference. While the left side is now fixed, the right side is much louder.

    Thanks,
    Blivy
    1979 CX500 Custom, Athens, Georgia
    Rebuilt Left Cylinder Head (2011)
    Rebuilt Starter (2011); Re-enameled tank (2011); Rebuilt Carbs (Larry method) (2012);
    Triple by-pass performed (2012);
    Upgrade to G8 stator and Ignitech (2012);
    Rebuilt oil pump and new oil chain (2012);
    Stripped and painted frame and wheels(can job) (2012);
    Re-greased/lubed rear drive and rear drive splines (2012);
    8 cell lithium Ballistic battery (2014); Upgrade to dual pot brakes with SS line (2014);
    New Shinko 230 tires (2014)
    New EBC clutch springs (2015); Rebuilt clutch cable assembly on clutch cover case (2015);
    New throttle, clutch, and choke cables (2015)

  11. #10
    OCR
    OCR is offline
    Senior Member OCR's Avatar
    Join Date
    Sep 2010
    Location
    Groton NY
    Posts
    2,247
    Pic?
    Past Master, Dryden Lodge #472
    Caroline Lodge # 681
    RAM Fidelity # 77





    '79CX500C

    http://cx500forum.com/mediawiki/inde...itle=Main_Page



    we are all given sh*t in life, but some of us learn to turn it into fertilizer and grow from it, and some us try to fling it on others like monkeys.

Page 1 of 2 1 2 LastLast

Sponsored Links

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

Similar Threads

  1. Better sound
    By KentM in forum CX Customization and Mods Forum
    Replies: 10
    Last Post: 04-03-2014, 03:12 PM
  2. Engine Sound
    By RambozoTari in forum Technical Help Forum
    Replies: 13
    Last Post: 04-11-2012, 05:52 AM
  3. What should valves sound like?
    By danpatdav in forum Technical Help Forum
    Replies: 10
    Last Post: 03-14-2012, 04:58 PM
  4. No muffler sound...What do u think?
    By Dieboldly in forum CX Customization and Mods Forum
    Replies: 28
    Last Post: 10-20-2011, 12:29 AM
  5. does this sound like you
    By Bodyman224 in forum Midwest Riders
    Replies: 0
    Last Post: 09-17-2011, 03:12 PM