« previous next »
Pages: [1]   Go Down

Author Topic: Ticking CB650  (Read 1533 times)

0 Members and 1 Guest are viewing this topic.

rebel4089

  • Guest
Ticking CB650
« on: May 17, 2006, 08:28:19 AM »
After I adjusted the cam chain, I noticed there is a tick.  It almost sounds like an electrical arc, but I can not find any evidence for that.  It also kinda reminds me of a old Ford truck w/ a warped exhaust manifold.  If anybody could give me a direction to find out what is causing this I would apprecate it. ;D
Logged

rob

  • Guest
Re: Ticking CB650
« Reply #1 on: May 17, 2006, 10:12:15 AM »
Could be the valves, have you adjusted the valves prior to adjusting the cam chain?  It took me a few iterations of valve adjustment and cam chain adjustment to finally make it really quiet,

Rob
Logged

bguerr

  • Guest
Re: Ticking CB650
« Reply #2 on: May 17, 2006, 04:30:35 PM »
Was it ticking before you tensioned the cam chain?  I've been scratching my head raw trying to figure out where my ticking/rattle is coming from!  It was like it when i bought the bike though...
I adjusted all my valve clearances and nothing changed. 
Check here:  http://www.sohc4.us/forums/index.php?topic=3837.0
Is the noise intermittent?  mine is, nothing I intentionally do while driving makes it come or go, it has a mind of its own...electrical arc is a good way of describing the sound too
Logged

Offline scunny

  • Old Timer
  • ******
  • Posts: 4,613
  • don't call me expert
Re: Ticking CB650
« Reply #3 on: May 17, 2006, 09:49:13 PM »
could it be an exhaust leak at the head, this can sound like a ticking and appear/ disappear depending on header position
Logged
past-cb100,ts250,cb500,cb500,gs1000,gs650g.phillips traveller
present-CB 650 retro
            VTR1000F3
           XL250S riverbed rocket
           TS250[sold]
           TS185[sold]
           XL125S[sold]
           MT50 (white)
           MT50 (red)[sold]
           KN250/XS400 project
           XR/XL250 bitsa under construction
           SL100[sold]
           XL250R
           pedal(pub bike) leaks oil
my gallery http://gallery.sohc4.net/members/personal/scunny

Offline TwoTired

  • Really Old Timer ...
  • *******
  • Posts: 21,802
Re: Ticking CB650
« Reply #4 on: May 18, 2006, 02:11:27 AM »
This may sound stupid, but it works...
To eliminate an exhaust leak as a possible source, take a piece of aquarium tubing and put one end in your ear. With the other end probe around the exhaust ports.  If their is a leak there, you'll find out where while you "probe".  I've found vacuum leaks this way also.  For probing around hot exhaust headers, I insert a piece of brass tubing at the probe end, which can also work as a contact noise probe.
This allows you to get your ear right next to the noise source.

Audiences find this hilarious, BTW.  Especially in stereo!   For added entertainment wear an Optivisor, too!

Cheers,
Logged
Lloyd... (SOHC4 #11 Original Mail List)
72 500, 74 550, 75 550K, 75 550F, 76 550F, 77 550F X2, 78 550K, 77 750F X2, 78 750F, 79CX500, 85 700SC, GL1100

Those that learn from history are doomed to repeat it by those that don't learn from history.

Vatch

  • Guest
Re: Ticking CB650
« Reply #5 on: May 18, 2006, 05:08:34 AM »
Quote from: Rob on May 17, 2006, 10:12:15 AM
Could be the valves, have you adjusted the valves prior to adjusting the cam chain?  It took me a few iterations of valve adjustment and cam chain adjustment to finally make it really quiet,

Rob

Is there correct order to these?  Valves first then Cam chain? 
Logged

rob

  • Guest
Re: Ticking CB650
« Reply #6 on: May 18, 2006, 08:52:56 AM »
From this thread, http://www.sohc4.us/forums/index.php?topic=8570.0, it looks as if the correct order is cam chain then valves.  I had it switched in my mind.  Did you adjust the vavles after the cam chain adjustment ? :)

Rob
Logged

Vatch

  • Guest
Re: Ticking CB650
« Reply #7 on: May 18, 2006, 04:00:16 PM »
Quote from: Rob on May 18, 2006, 08:52:56 AM
From this thread, http://www.sohc4.us/forums/index.php?topic=8570.0, it looks as if the correct order is cam chain then valves.  I had it switched in my mind.  Did you adjust the vavles after the cam chain adjustment ? :)

Rob

Yeah. Looks like I can have an extra beer tonight.  ;D
Logged
Pages: [1]   Go Up
« previous next »