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Author Topic: Modifying standard muffler  (Read 1643 times)

baturb

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Modifying standard muffler
« on: May 13, 2013, 11:42:11 AM »

I have a 2010 GT650R, I have been on the lookout for an after market muffler to get a better sound from my bike, from what I have seen the prices are way out of my price range just for a better sound, the stock muffler on my bike at one point before I got the bike had a gate or something open into it and it has a small dent and a little scratch, this got me to thinking and doing some research, can I cut down the muffler and remove a baffle for a better sound, so I found another 1 day old stock muffler for $30, I got this incase I messed up my dented muffler, so with a backup I took the muffler off, ground down the rivets and removed the end cap, so far so good nothing damaged, I then got out the angle grinder and set to work on cutting down the muffler, in all I ended cutting 80mm (around 3 and a bit inches) off the end, I then cut out the tube from the end, after that I gently ground the weld off the end cap with the inner pipe so it would be able to be refitted into the muffler again, I had to cut the inner tube shorter than the outer heat shield so the end cap would fit flush again, after aligning the tips up I redrilled the hole for rivets and riveted the caps back on, refitted the muffler and started up to hear the results, well it is better than expected, it is louder without being over the top, and it now has a much deeper growl, and the look of a shorter pipe is terrific, and the throttle response is a little sharper, it only too about an hour and a half from start to finish, all in all a big win and I still have the spare muffler
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umop-ǝpisdn

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Re: Modifying standard muffler
« Reply #1 on: May 13, 2013, 11:52:46 AM »

Pics or it never happened. ;)

Video for the sound would be nice.

DBM
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I used to be a sensitive, new age guy, but times have changed and now I am more of a caring, understanding, ninties type.

baturb

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Re: Modifying standard muffler
« Reply #2 on: May 13, 2013, 09:30:09 PM »

ill put a link to my photobucket as soon as i get them uploaded, i cant seem to upload pics on here
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pr0turb088

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Re: Modifying standard muffler
« Reply #3 on: May 13, 2013, 10:37:49 PM »

This sounds exactly like something I need to do... :) Unfortunately I am hopeless when it comes to things like this... Any one in Sydney willing to help me out lol??

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baturb

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Re: Modifying standard muffler
« Reply #4 on: May 14, 2013, 01:11:02 AM »

hope these pics work, first is the completed muffler and the second shows how much i have cut off and the difference it makes

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james_73

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Re: Modifying standard muffler
« Reply #5 on: May 14, 2013, 02:26:35 AM »

baturb- did u find that the bike popped alot when off the throttle at all??

Pr0turb088-where abouts are you in sydney, i could help out if needed.
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"living life on the edge"
2008  HYOSUNG GT650R CARBY
1993 NISSAN 180SX 
2002 VW golf

baturb

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Re: Modifying standard muffler
« Reply #6 on: May 14, 2013, 02:59:20 AM »

No problems on deceleration at all, no popping, it has made a difference and the sound is amazing, it is louder without being in your face loud
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james_73

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Re: Modifying standard muffler
« Reply #7 on: May 14, 2013, 04:11:32 AM »

i think i missed, that your bike is efi?

Then the bike would self learn, that you have the back pressure.

cheers man
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"living life on the edge"
2008  HYOSUNG GT650R CARBY
1993 NISSAN 180SX 
2002 VW golf

pr0turb088

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Re: Modifying standard muffler
« Reply #8 on: May 14, 2013, 05:35:45 AM »

baturb- did u find that the bike popped alot when off the throttle at all??

Pr0turb088-where abouts are you in sydney, i could help out if needed.

Hi James_73 I think I have a mate who is going to help me out spoke to him not long ago, but if we fail lol I will let you know. Thanks for offering I am in Miranda near Cronulla.

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james_73

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Re: Modifying standard muffler
« Reply #9 on: May 14, 2013, 06:32:27 AM »

lol, im on the northern beaches so a fair treck out to ya, but have done this muffler modification before, so all to familiar with whats going on.
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"living life on the edge"
2008  HYOSUNG GT650R CARBY
1993 NISSAN 180SX 
2002 VW golf

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