G oog le BadWeB | Login/out | Topics | Search | Custodians | Register | Edit Profile


Buell Forum » XBoard » Archive through November 04, 2010 » Exhaust Packing « Previous Next »

Author Message
Top of pagePrevious messageNext messageBottom of page Link to this message

Terrys1980
Posted on Monday, October 25, 2010 - 11:00 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

I re-packed my Jardine a couple thousand miles ago. The packing was pretty ate up from the exhaust gases. Recently I shortened a Leo Vince and a Yoshimura pipes for a GSXR, both bikes had at least 5k miles on the pipes and the packing inside looked great. Both had the same screen, steel wool and fiber packing the Jardine has.

Why does the XB eat up the packing and not the inline 4's?
Top of pagePrevious messageNext messageBottom of page Link to this message

Andymnelson
Posted on Monday, October 25, 2010 - 12:34 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Just theory, but I would bet it's 2 factors:
1) vibrations.
2) unstable exhaust gas flow. an I4 exhaust has far less "pulsing" than does out V-twins.
Top of pagePrevious messageNext messageBottom of page Link to this message

Xbgeorge
Posted on Monday, October 25, 2010 - 01:40 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

I agree with Andy. The XB's exhaust has zero protection from vibrations, due to its mounting location. The exhaust output of a 600cc cylinder will also cause a bigger blast of air than a 250cc or a 150cc cylinder. The inline 4 is like standing in a steady 70 mile an hour wind. The v-twin is more like getting knocked over by 90 mph wind gusts.
Top of pagePrevious messageNext messageBottom of page Link to this message

Mikellyjo
Posted on Monday, October 25, 2010 - 05:46 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

So is it a function of wrapping the packing tighter or does that negative the effect?
Top of pagePrevious messageNext messageBottom of page Link to this message

Bluzzit34
Posted on Monday, October 25, 2010 - 10:10 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

not meaning to threadjack-- but how can u tell when the packing needs to be re-done? I have ridden about 2k miles, but I don't know the history of it. All the rivets are still on my Jardine, so I'm pretty sure its never been repacked.
Top of pagePrevious messageNext messageBottom of page Link to this message

Al_lighton
Posted on Tuesday, October 26, 2010 - 12:21 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

All packing is NOT created equal. The temp that the stuff loses "toughness" and becomes brittle is quite different for different materials, and the strand length is significant as well. The stock Jardine packing is not particularly great stuff.

Bristol Core (formerly Race Tools) makes the good stuff. We sent them a Jardine RT1 a while back and they developed a great packing kit for it. It uses both a steel wool core wrap followed by a long strand high temp pillowized packing layer. See http://www.americansportbike.com/shoponline/ccp0-p rodshow/9080-Packing.html . It'll last a good bit longer than the stock stuff.
Top of pagePrevious messageNext messageBottom of page Link to this message

Christopher12
Posted on Tuesday, October 26, 2010 - 12:25 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

I have 16K miles on my original Jardine and I can't tell if it's missing packing or not, nor can I tell whether it's louder or not.

I just learned Drummer has a better packing than glass. But wouldn't stainless steel even better? Something about fiberglass makes it work better? Sound-wise then?

Christopher
Top of pagePrevious messageNext messageBottom of page Link to this message

Christopher12
Posted on Tuesday, October 26, 2010 - 12:28 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Al just answered it.

Christopher
Top of pagePrevious messageNext messageBottom of page Link to this message

Terrys1980
Posted on Tuesday, October 26, 2010 - 09:22 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

So is it a function of wrapping the packing tighter or does that negative the effect?

Wrapping the packing tighter should not have a negative effect, the tighter the louder.

but how can u tell when the packing needs to be re-done?

The rule of thumb is 5k miles but since your is unknown I would look into re-packing it. Have a good look at the end cap for any kind of discoloration, that would be a indication that the packing is ate up in that specific area.

If you order new packing from Jardine it will not come with any steel wool, they claim the new packing material does not need it.

On my Jardine, when I took the pipe apart there was a channel ate out in the packing almost as if a worm dug a tunnel through it.}

BTW I ended up re-packing with some FMF brand packing from the local shop.

(Message edited by terrys1980 on October 26, 2010)
Top of pagePrevious messageNext messageBottom of page Link to this message

Levi
Posted on Sunday, October 31, 2010 - 12:50 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Alright Terry, how long will the FMF packing last in your experience? If it's been too recent to repack you're excused from this question.

I know for a fact that FMF packing last a very long time in a dirtbike but again, we're talking about a one lung powerplant with >1 liter of displacement.

Does the perforated tube in the Jardine can have different louvers? Different shaped holes?
Something is fundamentally wrong with the design for it to fail this often. Perhaps they repurposed a can for smaller displacement engines. This would account for it not being able to cope with the brutal pulses and very close proximity to the engine.

The OEM muffler looks like a piece from a main battle tank. There's packing in one area but the bulk of the work is done with chambering from what I can see. The packing that is there is not wispy fragile material. Looking at how the OEM piece works and looking at many of the other very durable mufflers makes the Jardine part look like an afterthought. Something just thrown together to meet a market.

Is anyone here intimately familiar with this issue? I'll be doing some reading elsewhere on the subject. Your nice aftermarket muffler shouldn't be consumable.

We ride bikes that put engineering before profit almost as a theme. To have a part hanging off of the bottom of your machine that is the antithesis of Lord Ericks teachings is just silly.
« Previous Next »

Add Your Message Here
Post:
Bold text Italics Underline Create a hyperlink Insert a clipart image

Username: Posting Information:
This is a private posting area. Only registered users and custodians may post messages here.
Password:
Options: Post as "Anonymous" (Valid reason required. Abusers will be exposed. If unsure, ask.)
Enable HTML code in message
Automatically activate URLs in message
Action:

Topics | Last Day | Tree View | Search | User List | Help/Instructions | Rules | Program Credits Administration