Ducati Monster Forum

Moto Board => Tech => Topic started by: lazylightnin717 on December 07, 2010, 03:45:44 PM

Title: Slip-ons slipping off
Post by: lazylightnin717 on December 07, 2010, 03:45:44 PM
I removed my rearsets for repaint last night and noticed something..... Here is the dilemma.

(http://i784.photobucket.com/albums/yy130/rappevan/DSC02535.jpg)

They slip right off with no resistance. Now I'm no mechanic but I've got a hunch that this isn't exactly what's supposed to happen. Here is the other dilemma...

(http://i784.photobucket.com/albums/yy130/rappevan/DSC02534.jpg)

That bolt is going to be a major PITA. I already tried wrenching on it a bit and it's not making me happy. So, where do I go from here? Any kind of sealant I could use or do I need to work those bolts lose to try and tighten the seal? Thanks to Ducati for giving "slip on" and whole new meaning!

BONUS: on a side note, I would like to understand this creature a little better. This was threaded into the rearset by the rear brake. When the brake is not engaged, there is a screw that touches the tip of this guy. Doesn't look like it moves. Is it a magnetic sensor for the brake light or am I way off?

(http://i784.photobucket.com/albums/yy130/rappevan/DSC02537.jpg)
Title: Re: Slip-ons slipping off
Post by: The Bearded Duc on December 07, 2010, 06:34:45 PM
Can't help much on the exhaust question but the last pic is the switch for your rear brake lever.

It isn't a magnetic though, the little nub at the end of the threads goes in and out when you depress the rear brake lever.
Title: Re: Slip-ons slipping off
Post by: Howie on December 07, 2010, 08:24:42 PM
Earlier Monsters did simply slip on and had no clamp, then, around 2002 the clamp appeared. 
Title: Re: Slip-ons slipping off
Post by: rockaduc on December 08, 2010, 02:36:56 AM
For the exhaust clamp bolt: try soaking in WD-40 overnight.  THat should help it loosen enough to allow you to properly tighten. 
+1 to what was said about the rear brake: The little nub IS the switch that gets activated by the brake pedal.
Title: Re: Slip-ons slipping off
Post by: lazylightnin717 on December 08, 2010, 04:18:17 AM
A quick search last night brought up high temp copper silicone sealant. Anybody ever try it out?
Title: Re: Slip-ons slipping off
Post by: 671M900 on December 08, 2010, 05:35:12 AM
Quote from: howie on December 07, 2010, 08:24:42 PM
Earlier Monsters did simply slip on and had no clamp, then, around 2002 the clamp appeared. 

True, but there was an sort of sleeve that sealed it, sort of like a slightly smaller pipe in the header pipe, and the rear exhaust pipes slipped in between the outer and inner header pipe.

Don't use the high temp copper, they have muffle weld/sealant, or even muffler metal tape to wrap around it.
Title: Re: Slip-ons slipping off
Post by: battlecry on December 08, 2010, 05:56:13 AM

Kroil for your bolt.  If you can't find it, mix ATF and acetone.

The copper silisealant works well.  Pity to have to buy a whole tube for that, but it will do the job.
Title: Re: Slip-ons slipping off
Post by: todds89 on December 08, 2010, 09:29:55 AM
Try PB Blaster on that bolt...
Title: Re: Slip-ons slipping off
Post by: lazylightnin717 on December 08, 2010, 11:40:24 AM
I sprayed some WD40 on those pregnant doges last night so I will see if it did anything today when I get home. I'm taking a can of PB Blast with me to try that out too. I hate the cans of PB blast though. Too many gaudy advertisements!

We have quite a bit of aluminum shim here at work. Perhaps that would work
Title: Re: Slip-ons slipping off
Post by: lazylightnin717 on December 08, 2010, 03:44:50 PM
WD40 worked like a charm. They both came out fairly easy. So what does everyone or anyone think about using aluminum shims to try to seal it off?
Title: Re: Slip-ons slipping off
Post by: jerryz on December 09, 2010, 08:58:59 PM
I shimmed one of mine on the S4 Yesterday cut a strip 20mm X 150mm curled it round and it helped a lot  placed it inside .
Title: Re: Slip-ons slipping off
Post by: lazylightnin717 on December 10, 2010, 05:54:31 AM
How thick was the shim you used? I took a quick look last night and it looks like it might be a PITA to get a shim in there. Also, did you locktight the clamp bolt?
Title: Re: Slip-ons slipping off
Post by: jerryz on December 11, 2010, 08:30:53 PM
I cut a strip of thin aluminium sheet 20mm by 150mm curled it up and it worked I just torqued the bolts up until the clamp was fully closed
Title: Re: Slip-ons slipping off
Post by: WhiteStripe on December 13, 2010, 10:25:46 AM
I woudl try some copper sealant first before shimming.  Just apply it liberally and then reclamp.  Worst case you leak and then go from there.
Title: Re: Slip-ons slipping off
Post by: DarkStaR on December 13, 2010, 10:35:27 AM
Get the pipes expanded.

(http://ecx.images-amazon.com/images/I/41zdszPnTeL._SL500_AA300_.jpg)
Title: Re: Slip-ons slipping off
Post by: lazylightnin717 on December 14, 2010, 07:12:34 AM
Quote from: DarkStaR on December 13, 2010, 10:35:27 AM
Get the pipes expanded.

(http://ecx.images-amazon.com/images/I/41zdszPnTeL._SL500_AA300_.jpg)

What is that contraption and how does it work?
Title: Re: Slip-ons slipping off
Post by: Latinbalar on December 14, 2010, 07:15:01 AM
You put it in and screw!  [thumbsup]
Title: Re: Slip-ons slipping off
Post by: 671M900 on December 14, 2010, 02:47:03 PM
It's kind of like a bar end. You rotate the screw and the plates on the outside expand, and in turn expand the end of the pipe.