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Old 09-13-2007, 08:57 PM   #21
Jaime
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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
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Old 09-13-2007, 10:07 PM   #22
johncruise
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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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Old 09-14-2007, 05:19 AM   #23
Jaime
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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.
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Old 09-14-2007, 03:14 PM   #24
Jaime
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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.
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Old 09-14-2007, 04:14 PM   #25
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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!
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Old 09-14-2007, 04:31 PM   #26
jonathan180iq
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Hey. That looks like the internals of a catalytic converter. The Euro bikes don't have smog protection, do they?
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Old 09-14-2007, 05:03 PM   #27
Jaime
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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. :??:
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Old 01-04-2009, 09:55 AM   #28
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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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Old 03-31-2010, 10:10 AM   #29
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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? :??:
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Old 03-31-2010, 02:33 PM   #30
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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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