Ducati Monster Forum

Moto Board => Tech => Topic started by: stopintime on June 28, 2009, 11:48:21 AM

Title: Buzzing vibration - advice?
Post by: stopintime on June 28, 2009, 11:48:21 AM
I notice a buzzing vibration through my left footpeg.
No audible sound.
Higher pitch (a few bees dressed in armor) than the engine - I have the same vibration rolling with the engine shut off.
It's only noticeable around 40mph.
Doesn't change with/without brakes applied.
The rear wheel/rim center is slightly warmer than the front. (right side)
Shook the wheel sideways, couldn't notice any freeplay.

My bike is just out of it's 24,000km service (15,000 miles?).

I guess part of that was checking the bearings, but they might have missed it [roll]

Your vote for possible issue, please.....
Title: Re: Buzzing vibration - advice?
Post by: stopintime on June 29, 2009, 03:37:58 PM
Anyone? [thumbsup]
Title: Re: Buzzing vibration - advice?
Post by: Speeddog on June 29, 2009, 03:40:23 PM
Chain tension?

Chain rubbing block on swingarm?
Title: Re: Buzzing vibration - advice?
Post by: ducpainter on June 29, 2009, 03:51:22 PM
I have an acquaintance that used to own an M750 that complained of the same issue after a service...

it never got figured out.
Title: Re: Buzzing vibration - advice?
Post by: DarkStaR on June 29, 2009, 09:30:51 PM
Quote from: Speeddog on June 29, 2009, 03:40:23 PM
Chain tension?

Chain rubbing block on swingarm?

+1
Title: Re: Buzzing vibration - advice?
Post by: wiggy_nz on June 30, 2009, 12:15:45 AM
Loosen the chain a bit and try again.  If the chain is too tight it will cause a vibration through the foot rest/s.
Title: Re: Buzzing vibration - advice?
Post by: stopintime on June 30, 2009, 03:24:54 AM
Thanks guys  [thumbsup]

I'll try the chain thing and see what happens.
Sounds logical since it's only a left side vibration.
Title: Re: Buzzing vibration - advice?
Post by: stopintime on July 10, 2009, 04:56:27 PM
Yes, the chain was very tight. Almost no freeplay with me on the bike.

The head tech at my shop couldn't help himself - the poor junior tech who serviced my bike just a couple of weeks earlier had to crawl into a corner.

Another lesson for me though: I'm going to equip my tool box better, upgrade my courage/knowledge and do more work on the bike myself [thumbsup]
Title: Re: Buzzing vibration - advice?
Post by: CairnsDuc on July 10, 2009, 05:05:38 PM
I always set mice with about 40mm of slack in it, a bit more than what Ducati suggest, but I would rather replace a chain that has a little to much wear from being just slightly loose, than replace a bearing in the Casing or have to replace the Hub.
I get in the habit of checking my Chain tension every 500 k's