GSX1400 Owners .org

Technically Speaking => Exhausts => Topic started by: frenchgixxer on Friday, 05 August 2022, 09:41 PM

Title: Exhaust - original mufflers gutted
Post by: frenchgixxer on Friday, 05 August 2022, 09:41 PM
Decided to try to debaffle the original canons. The bike has delkevic headers and collector and I would really have liked to put their 230mm oval carbon shorties on (looks, sound and weight saving) but they would have cost about 30% of what I paid for the bike so was hard to justify. If 20% I'd have gone for them, however.....

Not much info really on this mod. Jacog video on you tube but, as it turned out, that was very "economical" with the effort needed! A reference in the forum from milts and speedy but that was about it. The canons were not pristine so thought what the hell. In brief:-

1. Remove exhausts
2. Drill out the 2 rivets holding the end cap on
3. Use a 44mm hole saw to cut through the first outer weld
4. Unless you have a long hole saw the standard size will be too short to reach the inner one (about a cm inside) so cut the tip off for clearance - I used a dremel
5. Cut through the 2nd weld
6. The baffle will still not move as there is a 3rd weld where the baffle is joined with the deflector baffles about 6 inches inside. So I took a chisel and just kept bashing with a lump hammer till it moved freely - maybe 30 mins
7. Put a rod into the baffle and now just wiggle in all directions until that inner weld is finally broken - maybe another 30 mins
8. And still the baffle won't come out as the weld bead, on the inner side of the 3rd weld, catches. So crow bar, or similar, on the top neck of the baffle and push/hammer till it pops and then wriggle the baffle out
9. Tidy up rough edges
10. Re-rivet end cap. Unlike Jacog, I didn't feel the need to put another home made baffle back in.

Overall, I think it looks ok and definitely sounds much better (louder!)

Would I recommend doing this? Not if you have/want pristine original silencers on your bike as they will, inevitably, get dinged up a little with all the physical abuse needed to remove the baffles, talk about suzuki over engineering them!
Title: Re: Exhaust - original mufflers gutted
Post by: frenchgixxer on Friday, 05 August 2022, 09:56 PM
How can I load a short video of the sound? File says 10.4MB so too big to add? Thanks
Title: Re: Exhaust - original mufflers gutted
Post by: Jeykey on Sunday, 07 August 2022, 12:32 AM
Tried doing this on the K5 single can but couldn´t do it. I suppose it´s welded way down where the exhaust is at its straightest. Still in the garage for a further project. Even contacted a laser cutting company but still waiting for a reply. Would cut the can at that point and resolder with laser again.
Title: Re: Exhaust - original mufflers gutted
Post by: frenchgixxer on Sunday, 07 August 2022, 05:06 AM
Quote from: Jeykey on Sunday, 07 August  2022, 12:32 AM
Tried doing this on the K5 single can but couldn´t do it. I suppose it´s welded way down where the exhaust is at its straightest. Still in the garage for a further project. Even contacted a laser cutting company but still waiting for a reply. Would cut the can at that point and resolder with laser again.

Yes, its welded lower down - see attached pic (the lower weld point is at the bottom of the left hand side baffle). To remove I put a chisel down the inside of the baffle, and hit it with a hammer, back and forth. It moves and loosens, after maybe half an hour the weld will move back and forwards freely enough and then I put a longer bar down the baffle and just waggled it side to side and in a stirring motion until the baffle broke away completely, maybe another 30 mins. Then you have to ease the baffle out as the weld, on the underside of what has just broken away, may catch a bit. So, yes it is do-able. I'd attach a short sound video but don't know how to compress to the 1MB size limit for the forum
Title: Re: Exhaust - original mufflers gutted
Post by: froudy on Sunday, 07 August 2022, 04:10 PM
Upload the video to YouTube and then post the link to it on here :onya:
Title: Re: Exhaust - original mufflers gutted
Post by: frenchgixxer on Sunday, 07 August 2022, 04:41 PM
Quote from: froudy on Sunday, 07 August  2022, 04:10 PM
Upload the video to YouTube and then post the link to it on here :onya:

Ah OK. Never done that before, I'll give it a try, cheers
Title: Re: Exhaust - original mufflers gutted
Post by: Jeykey on Sunday, 07 August 2022, 11:28 PM
@frenchgixxer thanks for the feedback :)
Title: Re: Exhaust - original mufflers gutted
Post by: VladTepes on Monday, 08 August 2022, 04:03 PM
Quote from: frenchgixxer on Sunday, 07 August  2022, 04:41 PM
Quote from: froudy on Sunday, 07 August  2022, 04:10 PM
Upload the video to YouTube and then post the link to it on here :onya:

Ah OK. Never done that before, I'll give it a try, cheers

If you have trouble or don't have a youtube channel, let me know and I can upload it somewhere and link to it.
Title: Re: Exhaust - original mufflers gutted
Post by: frenchgixxer on Monday, 08 August 2022, 06:07 PM
Quote from: VladTepes on Monday, 08 August  2022, 04:03 PM
Quote from: frenchgixxer on Sunday, 07 August  2022, 04:41 PM
Quote from: froudy on Sunday, 07 August  2022, 04:10 PM
Upload the video to YouTube and then post the link to it on here :onya:

Ah OK. Never done that before, I'll give it a try, cheers

If you have trouble or don't have a youtube channel, let me know and I can upload it somewhere and link to it.

Thanks Vlad. I don't have a you tube channel so not sure where to load it too so I can link here
Title: Re: Exhaust - original mufflers gutted
Post by: paulr5604 on Friday, 26 August 2022, 01:52 AM
Quote from: frenchgixxer on Monday, 08 August  2022, 06:07 PM
Quote from: VladTepes on Monday, 08 August  2022, 04:03 PM
Quote from: frenchgixxer on Sunday, 07 August  2022, 04:41 PM
Quote from: froudy on Sunday, 07 August  2022, 04:10 PM
Upload the video to YouTube and then post the link to it on here :onya:

Ah OK. Never done that before, I'll give it a try, cheers

If you have trouble or don't have a youtube channel, let me know and I can upload it somewhere and link to it.

Thanks Vlad. I don't have a you tube channel so not sure where to load it too so I can link here

Any joy with the video tempted to do this to mine but would be interested in hearing it first
Title: Re: Exhaust - original mufflers gutted
Post by: frenchgixxer on Friday, 26 August 2022, 06:31 AM
Right, finally a link to you tube with a very short video of debaffled canons. I'll take a better one once I've worked out how to operate my new phone - first new one in 8 years lol

is3h0lhKT4A
Title: Re: Exhaust - original mufflers gutted
Post by: paulr5604 on Friday, 26 August 2022, 06:41 AM
Thank you

What is it like when riding?
Title: Re: Exhaust - original mufflers gutted
Post by: frenchgixxer on Friday, 26 August 2022, 07:09 AM
Definitely louder than stock but not as loud as mufflers from the likes of delkevic and blackwidow. TBH at speed its more wind roar anyways which is why I usually ride with ear plugs if going any distance.

If you're going to try to debaffle then, if you can, get a cheap, non pristine, spare set and modify those.
Title: Re: Exhaust - original mufflers gutted
Post by: seth on Friday, 26 August 2022, 07:25 AM
@Speedy1959
You did this with your old bike  :cheers:
Title: Re: Exhaust - original mufflers gutted
Post by: paulr5604 on Friday, 26 August 2022, 03:40 PM
Quote from: frenchgixxer on Friday, 26 August  2022, 07:09 AM
Definitely louder than stock but not as loud as mufflers from the likes of delkevic and blackwidow. TBH at speed its more wind roar anyways which is why I usually ride with ear plugs if going any distance.

If you're going to try to debaffle then, if you can, get a cheap, non pristine, spare set and modify those.

Thank you for the info. Mine are not pristine anyway and if they are not as loud as delkevic one's then I think it won't be an issue
Title: Re: Exhaust - original mufflers gutted
Post by: Speedy1959 on Friday, 26 August 2022, 04:01 PM
I did this to my original bike (Sophie)..
It was a pig of a job to do! MUCH harder than the "How to" on here would lead you to believe!
I would say before you even pick up a spanner you should hunt down a long holesaw.. I bought a standard shorter one and God did it make the job far harder to do.
Half way through the job I wished I hadnt bothered..
When the job was completed I was glad I had done it..
In total it took a full weekend..
I remember making a threaded tool to put down the end of the silencers and hook onto the baffle and then withdraw the baffle with the home made extractor.

In the end I loved the deep throated sound BUT the standard appearance.. Sounded gorgious when started up and blipped.

Do I intend to do it to the new GSX when I get it?
Probably but not for a while..

I would describe the sound as this.. )verall it makes the GSX sound like a 1400 instead of a 750 !

Yesterday I e-mailed the guy who owns my old bike to see if he fancied swapping silencers..

He unfortunately replied " I will stick with these thanks as I love the sound"..
That probably tells you all you need to know re sound!

The original link that got me ito doing this mod is below:

https://gsx1400owners.org/forum/index.php?topic=1924.0
Title: Re: Exhaust - original mufflers gutted
Post by: Notty on Friday, 26 August 2022, 05:39 PM
I have a pair of silencers ifor sale f you want to play with them Simon  :)
@Speedy1959
Title: Re: Exhaust - original mufflers gutted
Post by: KiwiCol on Friday, 26 August 2022, 05:48 PM
Quote from: Notty on Friday, 26 August  2022, 05:39 PM
I have a pair of silencers ifor sale f you want to play with them Simon  :)
@Speedy1959

How's he going to ride when you've taken both legs & an arm Notty?   :whatever: :whistling:
Title: Re: Exhaust - original mufflers gutted
Post by: grog on Friday, 26 August 2022, 06:47 PM
IMO, id be keeping stock mufflers intact, will be hens teeth in ten yrs.
Title: Re: Exhaust - original mufflers gutted
Post by: frenchgixxer on Friday, 26 August 2022, 08:30 PM
Quote from: Speedy1959 on Friday, 26 August  2022, 04:01 PM
I did this to my original bike (Sophie)..
It was a pig of a job to do! MUCH harder than the "How to" on here would lead you to believe!
I would say before you even pick up a spanner you should hunt down a long holesaw.. I bought a standard shorter one and God did it make the job far harder to do.
Half way through the job I wished I hadnt bothered..
When the job was completed I was glad I had done it..
In total it took a full weekend..
I remember making a threaded tool to put down the end of the silencers and hook onto the baffle and then withdraw the baffle with the home made extractor.

In the end I loved the deep throated sound BUT the standard appearance.. Sounded gorgious when started up and blipped.

Do I intend to do it to the new GSX when I get it?
Probably but not for a while..

I would describe the sound as this.. )verall it makes the GSX sound like a 1400 instead of a 750 !

Yesterday I e-mailed the guy who owns my old bike to see if he fancied swapping silencers..

He unfortunately replied " I will stick with these thanks as I love the sound"..
That probably tells you all you need to know re sound!

The original link that got me ito doing this mod is below:

https://gsx1400owners.org/forum/index.php?topic=1924.0


Yes, its not straightforward at all! Thats why I posted, having done it myself, to update Jacogs rather brief post. Enhanced sound definitely worth it
Title: Re: Exhaust - original mufflers gutted
Post by: paulr5604 on Friday, 26 August 2022, 08:41 PM
What length hole saw do you recommend the ones I have found have a cutting depth of 38mm
Title: Re: Exhaust - original mufflers gutted
Post by: frenchgixxer on Friday, 26 August 2022, 09:21 PM
Quote from: paulr5604 on Friday, 26 August  2022, 08:41 PM
What length hole saw do you recommend the ones I have found have a cutting depth of 38mm

The hole saw I used was about 40mm depth. It works fine to cut through the second interior plate holding the baffle BUT you have to trim the end of the baffle first (see my post how to) otherwise it will be too short.
Title: Re: Exhaust - original mufflers gutted
Post by: paulr5604 on Friday, 26 August 2022, 11:53 PM
Quote from: frenchgixxer on Friday, 26 August  2022, 09:21 PM
Quote from: paulr5604 on Friday, 26 August  2022, 08:41 PM
What length hole saw do you recommend the ones I have found have a cutting depth of 38mm

The hole saw I used was about 40mm depth. It works fine to cut through the second interior plate holding the baffle BUT you have to trim the end of the baffle first (see my post how to) otherwise it will be too short.

Thanks I have found one locally that is 60mm long so that should cut through the second weld
Title: Re: Exhaust - original mufflers gutted
Post by: Speedy1959 on Saturday, 27 August 2022, 05:16 AM
Quote from: paulr5604 on Friday, 26 August  2022, 08:41 PM
What length hole saw do you recommend the ones I have found have a cutting depth of 38mm

I am intending to get this 60mm long extra hard one..

https://www.screwfix.com/p/bosch-expert-multi-material-carbide-holesaw-44mm/696ky

S
Title: Re: Exhaust - original mufflers gutted
Post by: Speedy1959 on Saturday, 27 August 2022, 05:45 AM
Made a mistake with the link earlier..
Here is the post to my write up on doing this OEM silencer mod..

https://gsx1400owners.org/forum/index.php?topic=3189.0

S.
Title: Re: Exhaust - original mufflers gutted
Post by: frenchgixxer on Saturday, 27 August 2022, 05:49 AM
Slightly longer video of sound from my debaffled canons

https://youtube.com/shorts/VnaY6EqOanA
Title: Re: Exhaust - original mufflers gutted
Post by: Speedy1959 on Saturday, 27 August 2022, 06:04 AM
I had forgotten how good they sound..
Well done you!

I think I really must bite the bullet and do this mod...AGAIN !!!
Title: Re: Exhaust - original mufflers gutted
Post by: paulr5604 on Saturday, 27 August 2022, 06:07 AM
Thanks for the extra video and also for answering my questions I will be doing mine this weekend they sound amazing.
Title: Re: Exhaust - original mufflers gutted
Post by: frenchgixxer on Saturday, 27 August 2022, 06:13 AM
Quote from: paulr5604 on Saturday, 27 August  2022, 06:07 AM
Thanks for the extra video and also for answering my questions I will be doing mine this weekend they sound amazing.

They sound better with headphones (was taken on a old phone and the bike is in a brick outhouse so bit of sound resonance off the walls)
Title: Re: Exhaust - original mufflers gutted
Post by: Snapey on Saturday, 27 August 2022, 02:48 PM
It sounds flat. Maybe better in person but on that clip it sounds like it's struggling to rev. A dyno readout between stock and modified would be an interesting read.
Title: Re: Exhaust - original mufflers gutted
Post by: frenchgixxer on Saturday, 27 August 2022, 03:26 PM
Quote from: Snapey on Saturday, 27 August  2022, 02:48 PM
It sounds flat. Maybe better in person but on that clip it sounds like it's struggling to rev. A dyno readout between stock and modified would be an interesting read.

That was just a cold start, after sitting for a couple of weeks, so only revved it a little
Title: Re: Exhaust - original mufflers gutted
Post by: Speedy1959 on Saturday, 27 August 2022, 03:57 PM
Quote from: frenchgixxer on Saturday, 27 August  2022, 03:26 PM
Quote from: Snapey on Saturday, 27 August  2022, 02:48 PM
It sounds flat. Maybe better in person but on that clip it sounds like it's struggling to rev. A dyno readout between stock and modified would be an interesting read.

That was just a cold start, after sitting for a couple of weeks, so only revved it a little

Ahh I do like mechanically sympathetic riders..
At some of the meetups I go to there are certain guys (Tiny Nuts) that rev the bikes to the limiter repeatedly!!
I say to my mates "Well I would NOT buy his bike off him".
Title: Re: Exhaust - original mufflers gutted
Post by: grog on Saturday, 27 August 2022, 06:15 PM
Speedy, sim story, i hate frogwits that keep revving throttle at lights, surely they can reset idle so it works. One brand is worst, can you guess?
Title: Re: Exhaust - original mufflers gutted
Post by: KiwiCol on Saturday, 27 August 2022, 07:44 PM
Quote from: grog on Saturday, 27 August  2022, 06:15 PM
Speedy, sim story, i hate frogwits that keep revving throttle at lights, surely they can reset idle so it works. One brand is worst, can you guess?

Hardly?   
Title: Re: Exhaust - original mufflers gutted
Post by: grog on Saturday, 27 August 2022, 08:27 PM
Correct Col, they must listen to that stupid un muffled sound. Not much different to my air compressor except  compressor revs faster.
Title: Re: Exhaust - original mufflers gutted
Post by: Speedy1959 on Saturday, 27 August 2022, 08:31 PM
Quote from: grog on Saturday, 27 August  2022, 08:27 PM
Correct Col, they must listen to that stupid un muffled sound. Not much different to my air compressor except  compressor revs faster.

Literally spluttered on my coffee Grog..
Very good.