August 15th, 2013, 09:14 AM | #1 |
Motorcycle bon vivant...
Name: Rassie
Location: Cary, NC
Join Date: Jun 2011 Motorcycle(s): 300 Ninja, 250R Ninja, SV650S, CB350, GT750, Aprilia RS250, Triumph Street Triple R Posts: 101
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De-coring a 300 Ninja stock exhaust.
I installed my full Yoshi system a few weeks ago and had the stock muffler sitting on my work bench. So last weekend I looked at it and wondered how easy it would be to de-core it. I mean it is a great looking muffler, much better than previous gen ones. So I took out my hacksaw and got to work. Here are the results. Next step would be to weld in a perforated 2" pipe, wrap with fiberglass and weld it all back together again. I will keep you posted, waiting for the perforated pipe to show up at the moment. Not shown is the fiberglass wrap, nasty stuff went straight into the trash.
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August 16th, 2013, 05:20 PM | #2 |
ninjette.org member
Name: uKER
Location: Uruguay
Join Date: May 2012 Motorcycle(s): Kymco Quannon, Ninja 300 Posts: 17
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This might be a noob question, but what is the purpose of doing that?
Also, didn't you try removing the catalytic converter while you're at it? |
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August 16th, 2013, 08:19 PM | #3 |
ninjette.org certified postwhore
Name: Fish
Location: co
Join Date: Apr 2013 Motorcycle(s): 250/300 Posts: A lot.
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To make it louder if you did this and weld the ends back on you have a slip on for not much invested.
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August 16th, 2013, 09:10 PM | #4 |
ninjette.org member
Name: John
Location: Blue
Join Date: Aug 2013 Motorcycle(s): 2008 Ninja 250 Posts: 52
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Awesome lol, hope it works! I want a louder exhaust but that has to wait... I've spent so much lately.
Yes, yes, MSF advertisement... I remember that there are deaf people. Still makes me feel safer! |
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August 17th, 2013, 06:20 AM | #5 | |
Motorcycle bon vivant...
Name: Rassie
Location: Cary, NC
Join Date: Jun 2011 Motorcycle(s): 300 Ninja, 250R Ninja, SV650S, CB350, GT750, Aprilia RS250, Triumph Street Triple R Posts: 101
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Quote:
As for why I would remove the guts from the muffler and add a straight through perforated pipe that flows more air....cheap performance I guess and I was bored and have no projects to work on at the moment.
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NESBA 13, 300 Ninja, 250r Ninja, 06 SV650, Ninja ex250, CB350, CL90 ,GT750, Aprilia RS250, Triumph Street Triple R www.mybikeproject.com |
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1 out of 1 members found this post helpful. |
August 17th, 2013, 07:22 AM | #6 |
The Corner Whisperer
Name: Chris (aka Reactor)
Location: Northern KY
Join Date: May 2011 Motorcycle(s): 2010 250 (track), 1992 250, 2006 R6 (street/track), 2008 R6 (track) Posts: Too much.
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August 19th, 2013, 01:56 PM | #7 |
ninjette.org sage
Name: michael
Location: Central Georgia
Join Date: May 2013 Motorcycle(s): 2019 Ninja 400, Sold 2012 Ninja 650, Sold 2009 Ninja 250r, Sold 2007 DRZ400s Posts: 628
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Rassie, keep us updated on your project. I have a 300 canister and if it turns out to be a good modification then i'm game. the 300 canister is going on my '09 250. looks so much better than the silver one.
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August 20th, 2013, 11:52 AM | #8 |
Certifiable nontundrum
Name: Harper
Location: NC Milkshake stand
Join Date: Mar 2013 Motorcycle(s): 2013 SE NINJA 300 Posts: Too much.
MOTM - Sep '13, Sep '16
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I like what you have done here, shame my welder is in NC, maybe I can find sir welds a lot down here
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August 21st, 2013, 01:43 PM | #9 |
MSF Coach!
Name: Lupe
Location: Antioch, Tennessee
Join Date: Jun 2012 Motorcycle(s): 2003 ninja 250 Posts: 886
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i cant seem to weld anything with my 1960s licoln electric Arc welder, not to mention as soon as i try to practice the misses knows cuz it damn near dims the whole blocks lights.
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August 21st, 2013, 10:36 PM | #10 |
Certifiable nontundrum
Name: Harper
Location: NC Milkshake stand
Join Date: Mar 2013 Motorcycle(s): 2013 SE NINJA 300 Posts: Too much.
MOTM - Sep '13, Sep '16
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I usually use oxy, or my mig... Whoo, I ain't had my gear running in 6 years though, played a bit with the army toys through the years, dang I miss the engineers
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August 22nd, 2013, 06:42 AM | #11 |
MSF Coach!
Name: Lupe
Location: Antioch, Tennessee
Join Date: Jun 2012 Motorcycle(s): 2003 ninja 250 Posts: 886
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yeah arc welding is my worst enemy, gimme a mig or tig and i can weld on aluminum... gimme an arc, and ill blow a hole in what ever you need me to fix XD.
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August 22nd, 2013, 09:11 AM | #12 |
Certifiable nontundrum
Name: Harper
Location: NC Milkshake stand
Join Date: Mar 2013 Motorcycle(s): 2013 SE NINJA 300 Posts: Too much.
MOTM - Sep '13, Sep '16
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I know some guys that throw arcs with arc welders and use coat hangers like they were welding oxy... Never could do it the way they did. One of em even welded aluminum with durn arc welders... Those guys are pros!! Geniuses!!! I doubt I callus do it to save my life, may practice up an get it one day.
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August 22nd, 2013, 10:52 AM | #13 | |
MSF Coach!
Name: Lupe
Location: Antioch, Tennessee
Join Date: Jun 2012 Motorcycle(s): 2003 ninja 250 Posts: 886
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Quote:
my mexican side grandpa can arc weld on aluminum as if he was doing something as simple as putting a line of toothpaste on a brush. every time i ask him tips he says "mira, practice and when you learn ill help you" hes the kind of man that says 5 words a day and they are always gold lol. @Rassie any more progress?
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August 22nd, 2013, 11:41 AM | #14 |
Certifiable nontundrum
Name: Harper
Location: NC Milkshake stand
Join Date: Mar 2013 Motorcycle(s): 2013 SE NINJA 300 Posts: Too much.
MOTM - Sep '13, Sep '16
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That's good stuff!!! All I know is ya strike an arc between the pieces and get your rod into the place ya want welded, as of yet I haven't got it right... Always blow through, get the arc to close, or just in general don't get the job done trying to do such things... Yea my papaw would hand me any tool or equipment to use and say leave this alone an practice on some crap over there... Some things I learned, some things I helped tote to the scrap dealer hahaha
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August 28th, 2013, 01:24 PM | #15 |
ninjette.org sage
Name: michael
Location: Central Georgia
Join Date: May 2013 Motorcycle(s): 2019 Ninja 400, Sold 2012 Ninja 650, Sold 2009 Ninja 250r, Sold 2007 DRZ400s Posts: 628
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any update??
I am impatiently waiting!!! lol |
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October 16th, 2013, 08:08 AM | #16 |
Motorcycle bon vivant...
Name: Rassie
Location: Cary, NC
Join Date: Jun 2011 Motorcycle(s): 300 Ninja, 250R Ninja, SV650S, CB350, GT750, Aprilia RS250, Triumph Street Triple R Posts: 101
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Yes, sorry, work is crazy right now, we are heading for year end (Nov) so will probably only get to it after that. But it is lying on my bench tempting me.
This temptation is not helped much by the Aprilia RS250 project that is parked next to it...
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NESBA 13, 300 Ninja, 250r Ninja, 06 SV650, Ninja ex250, CB350, CL90 ,GT750, Aprilia RS250, Triumph Street Triple R www.mybikeproject.com |
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October 16th, 2013, 09:20 AM | #17 | |
I'm crazy,your excuse is?
Name: Winston
Location: Connecticut
Join Date: May 2013 Motorcycle(s): 250 2007 ninja Posts: A lot.
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Quote:
that looks easy enough to do. |
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October 16th, 2013, 10:54 AM | #18 |
Certifiable nontundrum
Name: Harper
Location: NC Milkshake stand
Join Date: Mar 2013 Motorcycle(s): 2013 SE NINJA 300 Posts: Too much.
MOTM - Sep '13, Sep '16
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Your having way to much fun man
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July 13th, 2014, 11:43 AM | #19 |
ninjette.org sage
Name: michael
Location: Central Georgia
Join Date: May 2013 Motorcycle(s): 2019 Ninja 400, Sold 2012 Ninja 650, Sold 2009 Ninja 250r, Sold 2007 DRZ400s Posts: 628
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Stop working so much and finish this project!!!
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July 13th, 2014, 03:50 PM | #20 |
Motorcycle bon vivant...
Name: Rassie
Location: Cary, NC
Join Date: Jun 2011 Motorcycle(s): 300 Ninja, 250R Ninja, SV650S, CB350, GT750, Aprilia RS250, Triumph Street Triple R Posts: 101
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Actually I did, but did not work on the exhaust. Working on a ZX6R front end conversion for my 300. I am tired of the front end chatter. Will post progress and details later this week. Have to download the pictures first.
I may do the exhaust this coming weekend. Very little work left, basically just the welding.
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NESBA 13, 300 Ninja, 250r Ninja, 06 SV650, Ninja ex250, CB350, CL90 ,GT750, Aprilia RS250, Triumph Street Triple R www.mybikeproject.com |
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July 13th, 2014, 04:23 PM | #21 |
ninjette.org sage
Name: michael
Location: Central Georgia
Join Date: May 2013 Motorcycle(s): 2019 Ninja 400, Sold 2012 Ninja 650, Sold 2009 Ninja 250r, Sold 2007 DRZ400s Posts: 628
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I'm looking to do the same thing. Just waiting on your results
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July 13th, 2014, 05:26 PM | #22 |
I'm crazy,your excuse is?
Name: Winston
Location: Connecticut
Join Date: May 2013 Motorcycle(s): 250 2007 ninja Posts: A lot.
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Why wait? Just do it!
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July 14th, 2014, 02:32 AM | #23 |
ninjette.org sage
Name: michael
Location: Central Georgia
Join Date: May 2013 Motorcycle(s): 2019 Ninja 400, Sold 2012 Ninja 650, Sold 2009 Ninja 250r, Sold 2007 DRZ400s Posts: 628
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Haha. Time for one reason. I'm sure it will sound fine but I was trying to wait to see how it turns out first. I was going t try it on my 250 can first. I currently have the stock 300 can on my '09.
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August 15th, 2014, 05:19 PM | #24 |
RIP Alex
Name: Cuong
Location: Houston, TX
Join Date: Apr 2011 Motorcycle(s): '10 250r, '09 265r Posts: A lot.
Blog Entries: 2
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@Rassie, can you get a picture of the exhaust baffle?
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August 16th, 2014, 12:35 PM | #25 | |
Motorcycle bon vivant...
Name: Rassie
Location: Cary, NC
Join Date: Jun 2011 Motorcycle(s): 300 Ninja, 250R Ninja, SV650S, CB350, GT750, Aprilia RS250, Triumph Street Triple R Posts: 101
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Quote:
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NESBA 13, 300 Ninja, 250r Ninja, 06 SV650, Ninja ex250, CB350, CL90 ,GT750, Aprilia RS250, Triumph Street Triple R www.mybikeproject.com |
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September 8th, 2014, 02:03 PM | #26 |
Motorcycle bon vivant...
Name: Rassie
Location: Cary, NC
Join Date: Jun 2011 Motorcycle(s): 300 Ninja, 250R Ninja, SV650S, CB350, GT750, Aprilia RS250, Triumph Street Triple R Posts: 101
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Drum roll please.
So finally I got around to the de-coring of the stock 300 muffler. It is now official, can be done. Nice clean straight through stock exhaust. Free (almost) power to the people (those who do not have 10 thumbs and know how to weld).
Have not tried it yet. But will probably end up swapping out the Yoshi pipe for this one at some point when I have nothing better to do (read 2055) Pictures attached.
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NESBA 13, 300 Ninja, 250r Ninja, 06 SV650, Ninja ex250, CB350, CL90 ,GT750, Aprilia RS250, Triumph Street Triple R www.mybikeproject.com |
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September 8th, 2014, 02:11 PM | #27 |
RIP Alex
Name: Cuong
Location: Houston, TX
Join Date: Apr 2011 Motorcycle(s): '10 250r, '09 265r Posts: A lot.
Blog Entries: 2
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What size core did you use? Did you keep the outlet hole diameter the same? I plan on doing this later after I cut up the 300 header for clearance on the 250.
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HalfFast Racing Team Serving Greater Houston Area Riders:WFO Riders MotoHouston HPC CMRA Ride Smart Fastline Lone Star Track Days |
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September 8th, 2014, 02:21 PM | #28 | |
Motorcycle bon vivant...
Name: Rassie
Location: Cary, NC
Join Date: Jun 2011 Motorcycle(s): 300 Ninja, 250R Ninja, SV650S, CB350, GT750, Aprilia RS250, Triumph Street Triple R Posts: 101
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Quote:
I did not alter the size of the inlet or outlet at the rear. I wanted to retain the stock look exactly.
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NESBA 13, 300 Ninja, 250r Ninja, 06 SV650, Ninja ex250, CB350, CL90 ,GT750, Aprilia RS250, Triumph Street Triple R www.mybikeproject.com |
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September 8th, 2014, 02:27 PM | #29 |
RIP Alex
Name: Cuong
Location: Houston, TX
Join Date: Apr 2011 Motorcycle(s): '10 250r, '09 265r Posts: A lot.
Blog Entries: 2
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You think there's enough lip on the end caps to put rivets through instead of cutting through the weld? I'm going to just grind down the welds and pull the caps apart. More work but it allows me to tune the stock muffler.
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HalfFast Racing Team Serving Greater Houston Area Riders:WFO Riders MotoHouston HPC CMRA Ride Smart Fastline Lone Star Track Days |
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September 8th, 2014, 02:34 PM | #30 |
Motorcycle bon vivant...
Name: Rassie
Location: Cary, NC
Join Date: Jun 2011 Motorcycle(s): 300 Ninja, 250R Ninja, SV650S, CB350, GT750, Aprilia RS250, Triumph Street Triple R Posts: 101
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That will not work. Look at my very first picture. The rear end cap is double walled and welded or pressed together. The baffle (also in the first pictures, the ugly brown perforated thingy) is also welded into the end cap and is actually fully enclosed, so you have to remove the whole thing. Only way to do it is to cut both ends.
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NESBA 13, 300 Ninja, 250r Ninja, 06 SV650, Ninja ex250, CB350, CL90 ,GT750, Aprilia RS250, Triumph Street Triple R www.mybikeproject.com |
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September 9th, 2014, 05:32 PM | #31 |
RIP Alex
Name: Cuong
Location: Houston, TX
Join Date: Apr 2011 Motorcycle(s): '10 250r, '09 265r Posts: A lot.
Blog Entries: 2
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I cut both ends off and kind of boogered the rear cap. Any suggestions for cheap core? I might just have to run to the muffler shop and see what they have.
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HalfFast Racing Team Serving Greater Houston Area Riders:WFO Riders MotoHouston HPC CMRA Ride Smart Fastline Lone Star Track Days |
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September 9th, 2014, 06:17 PM | #32 |
I'm crazy,your excuse is?
Name: Winston
Location: Connecticut
Join Date: May 2013 Motorcycle(s): 250 2007 ninja Posts: A lot.
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pics of carnage!
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September 9th, 2014, 07:00 PM | #33 |
Inline 4!!!
Name: Danny
Location: MA
Join Date: May 2014 Motorcycle(s): 2008 CBR600rr, 1987 KLR 250 Posts: A lot.
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Stock exhaust weighs a ton and looks ugly imo
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September 9th, 2014, 07:02 PM | #34 |
RIP Alex
Name: Cuong
Location: Houston, TX
Join Date: Apr 2011 Motorcycle(s): '10 250r, '09 265r Posts: A lot.
Blog Entries: 2
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Its nothing bad. I was trying to bang out the pipe and break the welds around the tail pipe to remove the rear cap. it caved in the mounting studs for the rear cap cover.
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HalfFast Racing Team Serving Greater Houston Area Riders:WFO Riders MotoHouston HPC CMRA Ride Smart Fastline Lone Star Track Days |
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September 9th, 2014, 07:14 PM | #35 |
Motorcycle bon vivant...
Name: Rassie
Location: Cary, NC
Join Date: Jun 2011 Motorcycle(s): 300 Ninja, 250R Ninja, SV650S, CB350, GT750, Aprilia RS250, Triumph Street Triple R Posts: 101
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NESBA 13, 300 Ninja, 250r Ninja, 06 SV650, Ninja ex250, CB350, CL90 ,GT750, Aprilia RS250, Triumph Street Triple R www.mybikeproject.com |
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