Suzuki2Strokes.com

Sundial Moto Sports

Suzuki Two-Stroke Message Board
Suzuki2Strokes.com
It is currently Wed Dec 19, 2018 6:43 am

All times are UTC - 6 hours




Post new topic Reply to topic  [ 6 posts ] 
Author Message
PostPosted: Sat Sep 15, 2018 6:55 pm 
Offline
Yeah Man, the Interstate

Joined: Mon Oct 20, 2008 1:27 am
Posts: 526
Location: New Zealand
I had been hearing a bit of extra noise coming out of the top right hand pipe on the 750J. So, I pulled the cone and took the baffle out - well, part of the baffle :wth: The outer half to two thirds came out in one piece but then I had to go fishing for the piece you can see in the pic below.

ImageBaffle 1 by [url=https://www.flickr.com/photos/160183095@N04/]

My question: How does this happen when the baffle was in one piece when it went into the muffler. The ends look twisted and sheared off. What forces would make this happen?

Thanks for any thoughts, Mike

_________________
Burt Munro + John Britten + Kim Newcombe + Ivan Mauger = Kiwi Street Cred

72 GT750J
71 TS250R
71 H1A


Top
 Profile  
 
PostPosted: Sat Sep 15, 2018 8:34 pm 
Offline
To the on ramp
User avatar

Joined: Mon Jun 12, 2017 12:01 pm
Posts: 231
Location: Galveston County, Tx.
Country: USA
Bikes owned: '75 T500M since '93 Ridden it over 100,000 mi
Tiny, miniscule cracks maybe formed even as early as the pressing of them at the factory that could go unnoticed by an owner with even a thin layer of carbon.

Add owners using a wooden broomstick to tap them out from the other end.......which is fine, IF they have been out recently and not really stuck bad. That and the natural vibration could cause further cracking.

If you want you can look at a couple of T500 baffles with the cracks I'm talking about in a For Sale thread of mine......I think around June of this year. I'll try and post the link here shortly. seems like a fellow could just burn off the carbon, clean and just braise these little cracks.

_________________
______________
______________________
_______________________________
GONE.......WITH A PUFF OF SMOKE AND A BLUR OF SPOKE


Top
 Profile  
 
PostPosted: Sat Sep 15, 2018 8:40 pm 
Offline
To the on ramp
User avatar

Joined: Mon Jun 12, 2017 12:01 pm
Posts: 231
Location: Galveston County, Tx.
Country: USA
Bikes owned: '75 T500M since '93 Ridden it over 100,000 mi
viewtopic.php?f=10&t=13393"

Now if I could just find half this stuff. :| To preserve what little sanity I have left, I have stopped looking for now. :?

_________________
______________
______________________
_______________________________
GONE.......WITH A PUFF OF SMOKE AND A BLUR OF SPOKE


Top
 Profile  
 
PostPosted: Tue Sep 18, 2018 10:50 am 
Offline
To the on ramp

Joined: Thu Feb 17, 2011 8:55 pm
Posts: 450
Location: Grand Rapids, Michigan, USA
Country: USA
Bikes owned: GT750
Pulling those pieces of baffle out through your exhaust pipe must have been interesting. :( One of my baffles has a crack in it as well that seems to be in the same location. Each season when I pull the baffle to repack - the crack is a little longer. Could just be exhaust turbulence over the course of 40+ years taking it's toll on the weakest bend... Not good in any case as replacements are getting pricey.

_________________
No really... it's supposed to smoke.

1974 Suzuki Nomad 340
1975 Suzuki GT750 Waterbuffalo


Top
 Profile  
 
PostPosted: Tue Sep 18, 2018 11:36 am 
Offline
To the on ramp
User avatar

Joined: Mon Jun 12, 2017 12:01 pm
Posts: 231
Location: Galveston County, Tx.
Country: USA
Bikes owned: '75 T500M since '93 Ridden it over 100,000 mi
I've stopped cracks from getting longer in plastic by drilling a hole at the end of the crack. Should work even better with metal if you want to try that. It's more of a common practice than you might think. Sometimes the crack may actually be just a bit longer than you can see with the naked eye so it's important that you have the edge of the hole at the true very end of the crack or of course the crack would just keep on going on the other side of the hole.


Yep, vibration/metal fatigue..........not a good thing. :( Just ask Mr. Honey :wink: ....from one of my favorite old movies.........

https://www.youtube.com/watch?v=2eCvwtKPKRY"

_________________
______________
______________________
_______________________________
GONE.......WITH A PUFF OF SMOKE AND A BLUR OF SPOKE


Top
 Profile  
 
PostPosted: Fri Sep 21, 2018 12:00 am 
Offline
Yeah Man, the Interstate

Joined: Mon Oct 20, 2008 1:27 am
Posts: 526
Location: New Zealand
Thanks for the replies fellas. Interesting to think of the vibrations doing their work over an extended period. I guess as the baffles aren't held in completely snug at the ends, there must be a bit of movement, which would accentuate the vibration's effects.

I've replaced the final 2/3 but think there must still be a little bit inside there. I'll try to retrieve that next time I have the pipes off. At the moment, she just sounds a little louder but still has the burble of the 750.

_________________
Burt Munro + John Britten + Kim Newcombe + Ivan Mauger = Kiwi Street Cred

72 GT750J
71 TS250R
71 H1A


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 6 posts ] 

All times are UTC - 6 hours


Who is online

Users browsing this forum: No registered users and 52 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB® Forum Software © phpBB Group
Sundial Moto Sports forum © by Eric F. Kalamaja
Suzuki2Strokes.com