Ducati Monster Forum

Moto Board => Tech => Topic started by: JMac on July 26, 2009, 07:14:49 AM

Title: High Pitch "Ping" - Diagnostic Help?
Post by: JMac on July 26, 2009, 07:14:49 AM
Getting a high pitched ping in the motor...almost like a small bell.  This started after I changed out the clutch line from the handle bars.  Clutch is engaging pretty smoothly (although still jumps a bit when kicked into first).  I have not checked valves yet (10k miles right now).  Changed gas type (both location and octane).  So I suppose the question is...should I start with the clutch or is the high-pitched bell-like pinging a direct symptom of the valves needing to be shimmed?  Thanks for your help!


Title: Re: High Pitch "Ping" - Diagnostic Help?
Post by: ducpainter on July 26, 2009, 07:25:23 AM
Is the ping/ring worse when cold?
Title: Re: High Pitch "Ping" - Diagnostic Help?
Post by: JMac on July 26, 2009, 02:57:29 PM
It is a bit worse when cold, but the only noticeable difference is at low RPMs...when it is revving it either goes away or the pipes are drowning out the sound!
Title: Re: High Pitch "Ping" - Diagnostic Help?
Post by: ducpainter on July 26, 2009, 04:11:10 PM
I had a 750 SS that sounded like it was beating itself to death.

I'll bet you're losing the hockey pucks in between the cylinder fins.

The noise I believe you're hearing is called fin ring.
Title: Re: High Pitch "Ping" - Diagnostic Help?
Post by: wiggy_nz on July 26, 2009, 11:18:03 PM
"Changed gas type (both location and octane)"????  Are you using a low octane of fuel...if soit is probably engine ping.  Change to a higher octane ie 95 or better
Title: Re: High Pitch "Ping" - Diagnostic Help?
Post by: Simon on July 27, 2009, 08:21:14 PM
Quote from: ducpainter on July 26, 2009, 04:11:10 PM
I had a 750 SS that sounded like it was beating itself to death.

I'll bet you're losing the hockey pucks in between the cylinder fins.

The noise I believe you're hearing is called fin ring.


Will it cause any problems?, the hockey pucks from my 620 falling off one at a time.
Title: Re: High Pitch "Ping" - Diagnostic Help?
Post by: Howie on July 28, 2009, 04:51:25 AM
Quote from: simoniz on July 27, 2009, 08:21:14 PM
Will it cause any problems?, the hockey pucks from my 620 falling off one at a time.

You might get a ticket for littering.
Title: Re: High Pitch "Ping" - Diagnostic Help?
Post by: Simon on July 28, 2009, 06:22:03 AM
 :D that's it. Then its no problem.

Thanks