Kerker exhaust question.

[Doublea]

Hey guys, me again. Well thought I was going to be able to ride today. Fat chance. Hope you guys might be able to help.
First, Kerker exhaust 2 into 1. Right where the two pipes connect to one the bottom pipe broke off. Guess from rust.
Second, did not want to buy new pipes figured it could be welded back together.
3rd, got a guy to weld back together he welded it where the pipe was no longer leaking but the only way he could do that is to weld the bottom of the top pipe to the top of the bottom pipe.
Got the exhaust back and put it on. Well the bike is backfiring really bad now. I mean like foot to foot and a half flame coming out.

My thoughts and questions,

1. Did the last person that knew about the hole retune the bike for the hole?
2. Is the way he welded it causing a pocket of exhaust to ignite which is causing the backfire.

Just a thought.

Sorry for the length but any suggestions on how to fix this would be great.

 

[Mr. Wright]

You put new exhaust gaskets in the heads? May be as simple as that.

 

[pauldeepsea]

Hey guys, me again. Well thought I was going to be able to ride today. Fat chance. Hope you guys might be able to help.
First, Kerker exhaust 2 into 1. Right where the two pipes connect to one the bottom pipe broke off. Guess from rust.
Second, did not want to buy new pipes figured it could be welded back together.
3rd, got a guy to weld back together he welded it where the pipe was no longer leaking but the only way he could do that is to weld the bottom of the top pipe to the top of the bottom pipe.
Got the exhaust back and put it on. Well the bike is backfiring really bad now. I mean like foot to foot and a half flame coming out.

My thoughts and questions,

1. Did the last person that knew about the hole retune the bike for the hole?
2. Is the way he welded it causing a pocket of exhaust to ignite which is causing the backfire.

Just a thought.

Sorry for the length but any suggestions on how to fix this would be great.

Also check to make sure the exhaust are fully seated into the heads.

 

[pauldeepsea]

Hey guys, me again. Well thought I was going to be able to ride today. Fat chance. Hope you guys might be able to help.
First, Kerker exhaust 2 into 1. Right where the two pipes connect to one the bottom pipe broke off. Guess from rust.
Second, did not want to buy new pipes figured it could be welded back together.
3rd, got a guy to weld back together he welded it where the pipe was no longer leaking but the only way he could do that is to weld the bottom of the top pipe to the top of the bottom pipe.
Got the exhaust back and put it on. Well the bike is backfiring really bad now. I mean like foot to foot and a half flame coming out.

My thoughts and questions,

1. Did the last person that knew about the hole retune the bike for the hole?
2. Is the way he welded it causing a pocket of exhaust to ignite which is causing the backfire.

Just a thought.

Sorry for the length but any suggestions on how to fix this would be great.

Hopefully the weld is completely sealed the leak.

Hey guys, me again. Well thought I was going to be able to ride today. Fat chance. Hope you guys might be able to help.
First, Kerker exhaust 2 into 1. Right where the two pipes connect to one the bottom pipe broke off. Guess from rust.
Second, did not want to buy new pipes figured it could be welded back together.
3rd, got a guy to weld back together he welded it where the pipe was no longer leaking but the only way he could do that is to weld the bottom of the top pipe to the top of the bottom pipe.
Got the exhaust back and put it on. Well the bike is backfiring really bad now. I mean like foot to foot and a half flame coming out.

My thoughts and questions,

1. Did the last person that knew about the hole retune the bike for the hole?
2. Is the way he welded it causing a pocket of exhaust to ignite which is causing the backfire.

Just a thought.

Sorry for the length but any suggestions on how to fix this would be great.

There may also be a leak if the weld did not completely seal the hole

 

[BadDawg Bill]

You should have placed a smaller tube inside the pipes and welded the 2 pipes to it instead of the top pipe. I'd say you have a leak on the weld and maybe a header leak... good luck.

 

[Doublea]

You put new exhaust gaskets in the heads? May be as simple as that.

To answer this one, yes the gasket in between the flange and motor is in.

 

[Doublea]

Also check to make sure the exhaust are fully seated into the heads.

The weld caused the pipes to be alittle tougher to get on but I will go back and check them again.

 

[Doublea]

Hopefully the weld is completely sealed the leak.

There may also be a leak if the weld did not completely seal the hole

The only thing that doesn't make sense on this one is if that were true wouldn't it be backfiring as bad if not worse when the pipe broke.

 

[Doublea]

You should have placed a smaller tube inside the pipes and welded the 2 pipes to it instead of the top pipe. I'd say you have a leak on the weld and maybe a header leak... good luck.

Not sure if I am sure what you are talking about there. The pipe broke clean. The top pipe connects to the 2 into 1. The pipe that broke, broke where it connects to the 2 into 1.

 

[pauldeepsea]

The only thing that doesn't make sense on this one is if that were true wouldn't it be backfiring as bad if not worse when the pipe broke.

Not entirely the weld may have closed the amount that it is leaking but you may not have a complete seal

 

[pauldeepsea]

You should have placed a smaller tube inside the pipes and welded the 2 pipes to it instead of the top pipe. I'd say you have a leak on the weld and maybe a header leak... good luck.

Agree, welding the top to the bottom may have left a gap in between the exhaust the pipes are not flush and it would be hard to seal

 

[Fat_Bastard]

My pipe cracked too...

I had my Kerker welded in the same spot where the two join into one. They welded front side and backside a little further up and around to be sure it would not crack.

But this made it very difficult to re-assemble as I could not flex the pipes back into place in the "exhaust manifold ports" I may have put stress on the weld and even created a hair line crack esle where getting them back on-- but no backfire or change in performance after weld.

I need a new tail piece cone since mine has blown a hole in the outer chrome wall.

Maybe we should both just consider a new exhaust system...

 

[Doublea]

My pipe cracked too...

I had my Kerker welded in the same spot where the two join into one. They welded front side and backside a little further up and around to be sure it would not crack.

But this made it very difficult to re-assemble as I could not flex the pipes back into place in the "exhaust manifold ports" I may have put stress on the weld and even created a hair line crack esle where getting them back on-- but no backfire or change in performance after weld.

I need a new tail piece cone since mine has blown a hole in the outer chrome wall.

Maybe we should both just consider a new exhaust system...

I agree, just wish I had that coin. LOL!

 

[firedog19]

i have the entire pipe for the shipping cost

 

[BWG56]

You put new exhaust gaskets in the heads? May be as simple as that.

To answer this one, yes the gasket in between the flange and motor is in.

He didn't ask if it was in, he asked if you replaced them with new ones, welding them together probably changed the way they seat in the old gaskets causing a leak.

 

[Doublea]

He didn't ask if it was in, he asked if you replaced them with new ones, welding them together probably changed the way they seat in the old gaskets causing a leak.

Good point, did not use new ones. Will have to try that thanks.

 

[Doublea]

i have the entire pipe for the shipping cost

Are you saying you have one you want to get rid of or you got one for that price?

 

[Fat_Bastard]

I agree, just wish I had that coin. LOL!

My crack before the weld, see photo.

They welded all the way around the circumference of the upper pipe; and to the left and right of the pencil all the way around horizontally the other way, parallel to the two pipes in the "V" area; so the new weld extends beyond the pencil point to the right and left for a total of about 3 inches.

I remember them saying to do it this way just in case, so they don't leak; and as they weld the heat may cause a burn-thru and leak into each other a little sooner toward the bend split area.

It was a bitch flexing them back on...

Sorry no post weld photo; But just so you guys get the drift here...



Eventually they will crack again -- I'm sure.

Yes, I used new gaskets; could not them on right any other way.

 

[firedog19]

if you need it yours for the cost of shipping

 

[Doublea]

if you need it yours for the cost of shipping

May take you up on that if I can't get these to work. Thx.