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TheInternet |
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TheInternet Borekit Bruiser
Joined: 14 Dec 2010 Karma :
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Posted: 23:37 - 09 May 2016 Post subject: Can this exhaust be salvaged? |
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My CG125 exhaust has started to leak where it joins the head and as far as I can tell it is likely to be due to corrosion creating a hole. The rest of the exhaust is in good condition.
Can it be repaired or filled in some fashion to eke some more life out of it or is replacement the only option? A new Honda one is ~£100. It seems like there is a chance it just needs a new gasket; I'll probably replace it first just in case but should I add some other exhaust paste too to fill any holes?
Couple of pics, the leak seems to be to the right of the nut in the top picture.
https://s32.postimg.org/etl1arrtd/IMG_20160509_200604.jpg
https://s32.postimg.org/81gu2oyoh/IMG_20160509_200620.jpg |
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stinkwheel |
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stinkwheel Bovine Proctologist
Joined: 12 Jul 2004 Karma :
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Posted: 23:50 - 09 May 2016 Post subject: |
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Only way you'll know is to take it off and have a look.
It'll either be a blown gasket or there will be a hole where the lip is welded to the pipe.
If it's the latter, any patching would be temporary at best. The heat generated from an aircooled engine up there will cook pretty much anything you use.
Plumbers silicone would be your best bet.
About £45-55 for a pattern exhaust on ebay. ____________________ “Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles. |
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TheInternet |
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TheInternet Borekit Bruiser
Joined: 14 Dec 2010 Karma :
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RhynoCZ |
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RhynoCZ Super Spammer
Joined: 09 Mar 2012 Karma :
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Posted: 08:21 - 10 May 2016 Post subject: |
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Use some penetrating oil before you attempt taking the nuts off. Even spray with WD40 and a few gentle knocks with hammer should do the trick. Spray it, knock it with hammer, let it sit, then repeat or attempt taking the nuts off.
To ''unlock'' the nuts, the torque must be a instant impact, not slowly turning the wrench. Side note, use the smallest wrench you have in your set. If you use a big one, you're gonna put too much stress there, as the torque would significantly increase with longer lever.
EDIT: No need to replace the studs, I took the exhaust off many engines and none of them required new studs. It's not like the bolts that hold the head to the engine that stretch once you torque them down. ____________________ '87 Honda XBR 500, '96 Kawasaki ZX7R P1, '90 Honda CB-1, '88 Kawasaki GPz550, MZ 150 ETZ
'95 Mercedes-Benz w202 C200 CGI, '98 Mercedes-Benz w210 E200 Kompressor |
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TheInternet |
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TheInternet Borekit Bruiser
Joined: 14 Dec 2010 Karma :
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Posted: 20:56 - 01 Jun 2016 Post subject: |
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All weldy up now. Was about a 5mm x 1mm hole beneath the flange, a new sleeve has been added over the top. The Honda exhaust appears to be double skinned for that section.
Nuts removed painlessly, the bugle was then easy enough to take off without removing any other components.
A new copper crush gasket and it's all smooth again. As smooth as a CG125 can be, at least.
https://s33.postimg.org/yare8t4x7/image.jpg |
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Rogerborg |
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Rogerborg nimbA
Joined: 26 Oct 2010 Karma :
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Posted: 07:39 - 02 Jun 2016 Post subject: |
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Neat, thanks for the follow up. It's good to get closure. ____________________ Biking is 1/20th as dangerous as horse riding.
GONE: HN125-8, LF-250B, GPz 305, GPZ 500S, Burgman 400 // RIDING: F650GS (800 twin), Royal Enfield Bullet Electra 500 AVL, Ninja 250R because racebike |
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Oldie |
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Oldie Brolly Dolly
Joined: 05 Dec 2010 Karma :
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Commuter_Tim |
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Commuter_Tim World Chat Champion
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Old Thread Alert!
There is a gap of 1 year, 257 days between these two posts... |
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TheInternet |
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TheInternet Borekit Bruiser
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Suntan Sid |
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Suntan Sid World Chat Champion
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Chris45 |
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Chris45 Nitrous Nuisance
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Beehive Bedlam |
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Beehive Bedlam World Chat Champion
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RhynoCZ |
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RhynoCZ Super Spammer
Joined: 09 Mar 2012 Karma :
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Posted: 19:08 - 15 Feb 2018 Post subject: |
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TheInternet wrote: | The wretched thing is blowing again, similar location. |
That is because they/you used a wrong type of welding for this. You need something that really heats up the whole area.
I would say just replace it, as it will crack again unless properly welded, which costs money and time. Exhausts are the worst for welding, the constant heat cycles combined with vibration and rust will result in cracks no matter what.
And yes, I just agreed with Bodyguard. ____________________ '87 Honda XBR 500, '96 Kawasaki ZX7R P1, '90 Honda CB-1, '88 Kawasaki GPz550, MZ 150 ETZ
'95 Mercedes-Benz w202 C200 CGI, '98 Mercedes-Benz w210 E200 Kompressor |
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TheInternet |
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TheInternet Borekit Bruiser
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Fisty |
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Fisty Super Spammer
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Courier265 |
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Courier265 World Chat Champion
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Chris45 Nitrous Nuisance
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Posted: 21:19 - 16 Feb 2018 Post subject: |
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Polarbear |
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FollowingGhos... |
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FollowingGhos... Derestricted Danger
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TheInternet |
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TheInternet Borekit Bruiser
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Rogerborg |
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Rogerborg nimbA
Joined: 26 Oct 2010 Karma :
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Posted: 11:46 - 06 Jul 2018 Post subject: |
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I love a good follow through.
Aside, I'd wonder if unmolested good condition CG125s are likely to be the next "appreciating classics". ____________________ Biking is 1/20th as dangerous as horse riding.
GONE: HN125-8, LF-250B, GPz 305, GPZ 500S, Burgman 400 // RIDING: F650GS (800 twin), Royal Enfield Bullet Electra 500 AVL, Ninja 250R because racebike |
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arry Super Spammer
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TheInternet |
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TheInternet Borekit Bruiser
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A100man |
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A100man World Chat Champion
Joined: 19 Aug 2013 Karma :
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Posted: 16:08 - 06 Jul 2018 Post subject: |
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arry wrote: | Rogerborg wrote: | I love a good follow through.
Aside, I'd wonder if unmolested good condition CG125s are likely to be the next "appreciating classics". |
It's the kind of thing the Shoreditch aficionados would buy the very best most original example they could find, in order to bob the rear and rust the tank. |
I take it you mean this bunch of 24 caret cunts...
https://thebikeshed.cc/wp-content/uploads/2018/02/IMG_8570-800x500.jpg ____________________ Now: A100, GT250A, XJ598, FZ750
Then: Fizz, RS200, KL250, XJ550, Laverda Alpina, XJ600, FZS600 |
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Old Thread Alert!
The last post was made 5 years, 298 days ago. Instead of replying here, would creating a new thread be more useful? |
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