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Mechanical and Technical Mechanical and technical topics, help, and discussions

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  • 1 Post By Pavement Tested
  • 1 Post By unicykle
  • 2 Post By DGA
  • 2 Post By Pavement Tested
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Aug 7th 2018, 04:37 PM   #1
 Andonon's Avatar
 
  Jul 2018
  Mill Creek

  06 SV650S (street), 06 ZX10R (track)
Help me cut off my exhaust?

I want to cut off the factory exhaust on my Sv. Can you help me? I donít have a sawzall.

My intent is to add a Yoshimura but I can ride this vtwin straight pipe for a couple days.

Thanks.
Aug 7th 2018, 04:54 PM   #2
 Rock Dodger's Avatar
 
  Feb 2016
  Washington

Don't even think about riding with no muffler.

Wait until you get the can, and in the meantime, buy or borrow a sawzall. Be careful not to saw into the swing arm, it's very easy to do. Use a hose clamp around the pipe to make sure the cut is straight. Be sure to de-burr the ID of the pipe before you install the can. Seal the can/pipe connection with high temp (copper) RTV.

If you were close by, I would help, but that's not the case.
Aug 7th 2018, 05:28 PM   #3
 Pavement Tested's Avatar
 
  Jan 2016
  Bremerton

  '12 Concours14, '08 GSX1300R, '06 GSX-R 750
Go to the hardware store or look on Amazon. Get a chain type pipe cutter for $30. It's the absolute easiest way to cut exhaust pipe.

Personally, I think the stock exhaust on that bike is a stupid design and you should spend the money on a full system but that your call.


I cannot recommend running it without a muffler.
Andonon likes this.
Aug 7th 2018, 05:40 PM   #4
 Andonon's Avatar
 
  Jul 2018
  Mill Creek

  06 SV650S (street), 06 ZX10R (track)
So. What why y’all worried about running with no exhaust? Besides the obvious noise... I don’t understand. I could just put a shorty GP on. I need more noise, I wear earplugs. I ride like nobody sees me...
Aug 7th 2018, 05:51 PM   #5
 Andonon's Avatar
 
  Jul 2018
  Mill Creek

  06 SV650S (street), 06 ZX10R (track)
Question

Quote:
Originally Posted by Rock Dodger
Don't even think about riding with no muffler.

Wait until you get the can, and in the meantime, buy or borrow a sawzall. Be careful not to saw into the swing arm, it's very easy to do. Use a hose clamp around the pipe to make sure the cut is straight. Be sure to de-burr the ID of the pipe before you install the can. Seal the can/pipe connection with high temp (copper) RTV.

If you were close by, I would help, but that's not the case.
Haha. You sound EXACTLY like a youtube video I just watched. RTV Sealant! Hold my beer... I'm gonna faint.

Seriously though, why "Don't even think..."...? I can't stop thinking about it. It sounds fun. Just for a week or so. I'm curious if you all know something I don't.

1) Sound - Check, expected.
2) Cops - Where?
3) Drivers - Good, they don't see my anyway.
4) Engine - SV - not an issue.
5) Neighbors - Don't care.
6) uhh.. Ear damage? - I wear ear plugs always. Wife says I never hear her anyway.
7) uhh... what am I missing. I like nitormethane?
Aug 7th 2018, 07:20 PM   #6
 unicykle's Avatar
 
  Sep 2017
  milwaukie oregon

  gsxr600 gsxr750 gsxr1000 i like gsxrs
Go for it, a few times i wanted to pull the cans off and do a midnight gp run on the old rc51 but that was back when i drank alot.
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Aug 7th 2018, 08:12 PM   #7
 Pavement Tested's Avatar
 
  Jan 2016
  Bremerton

  '12 Concours14, '08 GSX1300R, '06 GSX-R 750
Running exhaust like that without tuning the engine for it is bad news. If you wanna fuck up your engine while acting like a jackass running no muffler, go for it.

You asked the question and you got your answer. Take the advice, or don't. Just make sure you post up your ensuing problems so we can all get a good laugh at you.
Aug 8th 2018, 04:36 AM   #8
 Andonon's Avatar
 
  Jul 2018
  Mill Creek

  06 SV650S (street), 06 ZX10R (track)
Quote:
Originally Posted by Pavement Tested
Running exhaust like that without tuning the engine for it is bad news. If you wanna fuck up your engine while acting like a jackass running no muffler, go for it.

You asked the question and you got your answer. Take the advice, or don't. Just make sure you post up your ensuing problems so we can all get a good laugh at you.
Hey. The chain thing was helpful. Thanks man. Iím poking fun at the ones who think Iíll fuck up my engine. I wanna know why cuz I think that part is Fake. I donít think you can damage an sv650 engine unless you take the pipes completely off! Whatís funny is you nailed it. I was interested in being a jackass for a week. . Then get something nice on my bike. Thanks for the cutter idea. Needed that.
Aug 8th 2018, 06:26 AM   #9
DGA
 DGA's Avatar
Moderator
 
  Jan 2016
  PDX

  An Ape and a Husky
You are pretty dismissive of opinions after asking for one. Stop dicking around, cut off the fucking thing already and post some videos of the straight pipe mess.
Rusty Nail and 1shinysideup like this.
Aug 8th 2018, 07:25 AM   #10
 Suzuki Stevo's Avatar
 
  Jan 2016
  Seattle ,Wa

  Burgman 400, TW200, Boulevard M50, 2018 Indian Scout 1131, 2018 Indian Chieftain Classic
Go to a hardware store and get what is basically a hacksaw blade handle, it holds one end of a hacksaw blade...use a fine tooth blade. I have cut many a pipe with one, they are under $10

Edited by Suzuki Stevo on Aug 8th 2018 at 08:14 AM
Aug 8th 2018, 07:29 AM   #11
 albatrosscafe's Avatar
 
  Jan 2016
  Issaquah

  2015 Yamaha FZ-07
Quote:
Originally Posted by Andonon
Haha. You sound EXACTLY like a youtube video I just watched. RTV Sealant! Hold my beer... I'm gonna faint.

Seriously though, why "Don't even think..."...? I can't stop thinking about it. It sounds fun. Just for a week or so. I'm curious if you all know something I don't.

1) Sound - Check, expected.
2) Cops - Where?
3) Drivers - Good, they don't see my anyway.
4) Engine - SV - not an issue.
5) Neighbors - Don't care.
6) uhh.. Ear damage? - I wear ear plugs always. Wife says I never hear her anyway.
7) uhh... what am I missing. I like nitormethane?
The tuning thing on a small engine like that (assuming SV650) I think is not very applicable. Most fuel injected engines can account for it.

I've ridden my FZ07 around the block with straight pipes while changing the muffler out. Holy crap, that was painful. Even with my earplugs, that would give me a headache after 2 minutes. SO much bass.

Don't get me wrong, it sounds REALLY good. I would love for my bike to always have that sound quality. But it is so loud that you will be the most obnoxious person in the world to both yourself and others for a few days. Not worth it to me.
Aug 8th 2018, 09:04 AM   #12
 Pavement Tested's Avatar
 
  Jan 2016
  Bremerton

  '12 Concours14, '08 GSX1300R, '06 GSX-R 750
Quote:
Originally Posted by Andonon
Hey. The chain thing was helpful. Thanks man. I’m poking fun at the ones who think I’ll fuck up my engine. I wanna know why cuz I think that part is Fake. I don’t think you can damage an sv650 engine unless you take the pipes completely off! What’s funny is you nailed it. I was interested in being a jackass for a week. . Then get something nice on my bike. Thanks for the cutter idea. Needed that.
Cutting the muffler off or even running a free flowing exhaust that the ECU is not tuned for can damage your engine. The exhaust will start backfiring on deceleration (rolling off the throttle).

Backfiring is not a good thing despite all these IG and FB heros posting their shit bouncing off the limiter and shooting flames out the tailpipe. Backfiring is the combustion of unspent fuel outside of the cylinder, where it's supposed to happen. This puts undue pressure in areas that are not supposed to have it, elevated pressure in the header and on the back side of the exhaust valves, the valve seals, etc. It also builds heat where it is supposed to be carried away by the normal flow of exhaust. Over time this will wear out your engine to the point that you may start consuming oil, induce cracks in the header, wear out the valve seats etc. Not to mention putting your fuel mileage in the shitter.

ECU's do have a learning curve but that is to adjust to climate and altitude where air/fuel ratios can change a little at a time. It's why a carb'd bike will run great on the coast where it was tuned but will run like shit up in the mountains. Carbs don't self adjust. ECU's only have about an 8% learning curve IIRC. Changing to an aftermarket air filter or exhaust or both will exceed the maximum learning capability of the ECU.

There are lots of folks that say you'll be fine doing a slip-on without tuning and you may be for a while. Just know that you're killing you engine slowly and depending on how the bike was treated prior to your ownership it may be more harmful than you think.

Oh, forgot to mention that more air thru the engine without adjusting fuel will lean it out. Running lean engine is running a hot engine and a hot engine = more wear and tear on internals.
Rusty Nail and 1shinysideup like this.

Edited by Pavement Tested on Aug 8th 2018 at 10:44 AM
Aug 8th 2018, 12:48 PM   #13
 PeteN95's Avatar
Moderator
 
  Jan 2016
  Muklilteo, WA

  Suzuki DL1000, Honda XR650R, KTM 250 XC-W
The EFI system on the SV is not a closed loop system so it will not be able to adjust for a massive change in back pressure. I doubt you will hurt it, especially in a few days, but it is going to pop and bang quite loudly and you will be hated. Depending on the back pressure of the new muffler, it may require tuning to make it run well. A quieter muffler with more back pressure may be ok, a loud one with less back pressure, not so much.

I also have a Sawzall and would cut it if you buy a blade. The stock SV exhaust is double wall and very hard, if I remember correctly from cutting mine 20 years ago? I would make you coast down the street from my house afterward a couple blocks before starting it.
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