Muffler Swap - Page 3

Jaime · 09-13-2007, 09:57 PM

Do you mean the red arrow welding?

That's the point that I've cut. I think that there's another welding point somewhere. Maybe that piece is an expander welded from inside too. O_o

johncruise · 09-13-2007, 11:07 PM

We have a different muffler... but to show you where I cut the old muffler. Take a look at this:

Legends:
* green area is the stock muffler
* red area is the pipe and up to where it is extended into
* blue line is where I cut the original muffler (again, I did not cut "through" the pipe... just the muffler so the pipe or red area still extends to the partial overlapped green area).

Hope this helps. Sorry if I don't make much sense in my explanations... (not a mechanic myself) :-)

Jaime · 09-14-2007, 06:19 AM

Thanks, John! The picture is quite clarifying.

My bike's muffler is something different, but today I'm going to cut the blue arrow welding. I'm sure that it's the way to go.

Jaime · 09-14-2007, 04:14 PM

I've finally swaped mine. It has a tiny "red area" so it was hardly fixed there. I've needed the -free- help of a local workshop. :blush:

Stock muffler.

Now the mixture is quite lean again and I can't go further than 75 mph.
I'll carb the bike soon.

johncruise · 09-14-2007, 05:14 PM

nice! i like the new pipe you put there. That stock muffler has a lot of baffles... I would assume that it is really quiet before.

congrats with the mod!

**jonathan180iq** · 09-14-2007, 05:31 PM

Hey. That looks like the internals of a catalytic converter. The Euro bikes don't have smog protection, do they?

Jaime · 09-14-2007, 06:03 PM

Well, the stock exhaust wasn't noisy, but not really quite at all.

About that grid, sure that looks like a catalytic converter, but a carburetted bike shouldn't have one... Maybe is there to acomplish Euro-2 specs. :??:

Blackbird · 01-04-2009, 10:55 AM

Jamie,
How is the bike running with the new muffler and the jetted carb? Have you made any recent changes that you'd like to share? I will take on this project this spring and have found everyone's input very helpful and interesting.

doyoulikeduckmeat · 03-31-2010, 11:10 AM

I am thinking of doing the exhaust on my gz250.

here is my question: There are two pipes that are joined together under the heat shield, has any one considered putting dual exhaust on their bike or is this a bad idea? and if it is a bad idea why? :??:

Water Warrior 2 · 03-31-2010, 03:33 PM

Not a bad idea if you like to spend money needlessly. A single cylinder 4 valve head doesn't need separate exhaust systems for each exhaust port. The GZ works well as is, why take a chance on fouling up it's ability to make reasonable power and compromising it dependability.

09-13-2007, 09:57 PM	#21
Jaime Senior Member Join Date: Jul 2007 Location: Spain Posts: 102	Do you mean the red arrow welding? That's the point that I've cut. I think that there's another welding point somewhere. Maybe that piece is an expander welded from inside too. O_o __________________ Trying my best in English Login or Register to Remove Ads
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09-13-2007, 11:07 PM	#22
johncruise Member Join Date: Nov 2006 Location: Sunnyvale, CA US Posts: 34	We have a different muffler... but to show you where I cut the old muffler. Take a look at this: Legends: * green area is the stock muffler * red area is the pipe and up to where it is extended into * blue line is where I cut the original muffler (again, I did not cut "through" the pipe... just the muffler so the pipe or red area still extends to the partial overlapped green area). Hope this helps. Sorry if I don't make much sense in my explanations... (not a mechanic myself) :-) __________________
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09-14-2007, 06:19 AM	#23
Jaime Senior Member Join Date: Jul 2007 Location: Spain Posts: 102	Thanks, John! The picture is quite clarifying. My bike's muffler is something different, but today I'm going to cut the blue arrow welding. I'm sure that it's the way to go. __________________ Trying my best in English Login or Register to Remove Ads
	0

09-14-2007, 04:14 PM	#24
Jaime Senior Member Join Date: Jul 2007 Location: Spain Posts: 102	I've finally swaped mine. It has a tiny "red area" so it was hardly fixed there. I've needed the -free- help of a local workshop. :blush: Stock muffler. Now the mixture is quite lean again and I can't go further than 75 mph. I'll carb the bike soon. __________________ Trying my best in English
	0

09-14-2007, 05:14 PM	#25
johncruise Member Join Date: Nov 2006 Location: Sunnyvale, CA US Posts: 34	nice! i like the new pipe you put there. That stock muffler has a lot of baffles... I would assume that it is really quiet before. congrats with the mod! __________________ Login or Register to Remove Ads
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09-14-2007, 05:31 PM	#26
jonathan180iq Super Moderator Join Date: Jan 2007 Location: Dalton, GA Posts: 3,996	Hey. That looks like the internals of a catalytic converter. The Euro bikes don't have smog protection, do they?
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09-14-2007, 06:03 PM	#27
Jaime Senior Member Join Date: Jul 2007 Location: Spain Posts: 102	Well, the stock exhaust wasn't noisy, but not really quite at all. About that grid, sure that looks like a catalytic converter, but a carburetted bike shouldn't have one... Maybe is there to acomplish Euro-2 specs. :??: __________________ Trying my best in English
	0

01-04-2009, 10:55 AM	#28
Blackbird Member Join Date: Dec 2008 Location: Lake Orion, Michigan Posts: 80	Re: Muffler Swap Jamie, How is the bike running with the new muffler and the jetted carb? Have you made any recent changes that you'd like to share? I will take on this project this spring and have found everyone's input very helpful and interesting.
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03-31-2010, 11:10 AM	#29
doyoulikeduckmeat Junior Member Join Date: Mar 2010 Location: Tennessee Posts: 2	Re: Muffler Swap I am thinking of doing the exhaust on my gz250. here is my question: There are two pipes that are joined together under the heat shield, has any one considered putting dual exhaust on their bike or is this a bad idea? and if it is a bad idea why? :??: __________________ -- Yusef Moring Subhana Rabbiyal 'Aadheem Glory is to my Lord the Almighty
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03-31-2010, 03:33 PM	#30
Water Warrior 2 Senior Member Join Date: Dec 2006 Location: Squamish B.C Canada Posts: 11,409	Re: Muffler Swap Not a bad idea if you like to spend money needlessly. A single cylinder 4 valve head doesn't need separate exhaust systems for each exhaust port. The GZ works well as is, why take a chance on fouling up it's ability to make reasonable power and compromising it dependability.
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