Question about removing stock exhaust baffle

KenOnABike · June 1st, 2012, 06:59 PM

So I just bought a Ninja 250 from a guy; it's my first bike and I'm super excited about it. It's a 2010 with only 64 miles on it. The only problem is that he took the baffle out of the stock exhaust.

I don't know squat about engines and exhaust systems so I was hoping someone here could tell me if taking the baffle out could have any negative consequences before I start putting miles on the bike.

Also, I don't like the sound of the bike at all right now. I live in an apartment and I'm old so I like quiet things. How hard would it be for me to put the baffle back in the exhaust? (he still had it and gave it to me)

It seems like all I'd have to do is drill out the rivets on the muffler's end cap and stick it back in there. If I do this am I likely to mess something up?

Thanks guys!

Mountain Dew · June 1st, 2012, 07:25 PM

Running it without the baffle will make you run lean. The engine will run hotter and perform worse. It's possibly that if left like that long enough you could do permanent/expensive damage.

tmnamba · June 1st, 2012, 10:36 PM

Mountain Dew is right, any alteration to the air flow, be it exhaust or intake will effect you. With the baffle removed it will run lean and most these bikes run lean from the manufacture. I would shim the carb needles if I were you or buy a jet kit and instal l that. You need to make your air fuel mixture more rich as now it is possible that it is lean.
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Mountain Dew · June 1st, 2012, 11:04 PM

I think he wanted to put the baffle back in, not keep it baffleless like that.

I'm not sure how to put the baffle back in.

Motofool · June 2nd, 2012, 07:39 AM

Welcome to the site, Kenny!

Ask the previous owner (OP) if he did anything else, like the things suggested by Thomas above.
He could also tell you what work he did to remove the part.

In that case you would need to reverse the work to take everything back to stock conditions.

Mountain Dew · June 2nd, 2012, 09:43 AM

Buy him a beer and see if he'll help you put it back in

KenOnABike · June 2nd, 2012, 01:38 PM

I talked to the guy and was able to reverse what he did. I had to buy a rivet gun for 30 bucks but now it's TIME TO RIDE!!!

Thanks for the tips guys.

tmnamba · June 5th, 2012, 07:15 PM

Glad to hear you got it figured out! Just out of curiosity did you notice any difference in sounds or performance between the two?
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KenOnABike · June 6th, 2012, 02:13 PM

Huge difference in sound. The bike was... I'll say maybe 20% louder without the baffle and the pitch was a bit deeper. No noticeable difference in performance.

June 1st, 2012, 06:59 PM	#1
KenOnABike ninjette.org newbie Name: Kenny Location: South Louisiana Join Date: Jun 2012 Motorcycle(s): 2010 Blue 250r VROOOM Posts: 7	Question about removing stock exhaust baffle So I just bought a Ninja 250 from a guy; it's my first bike and I'm super excited about it. It's a 2010 with only 64 miles on it. The only problem is that he took the baffle out of the stock exhaust. I don't know squat about engines and exhaust systems so I was hoping someone here could tell me if taking the baffle out could have any negative consequences before I start putting miles on the bike. Also, I don't like the sound of the bike at all right now. I live in an apartment and I'm old so I like quiet things. How hard would it be for me to put the baffle back in the exhaust? (he still had it and gave it to me) It seems like all I'd have to do is drill out the rivets on the muffler's end cap and stick it back in there. If I do this am I likely to mess something up? Thanks guys!

June 1st, 2012, 07:25 PM	#2
Mountain Dew Ambrosia. Name: Jaymie Location: Oahu, Hawaii Join Date: Aug 2011 Motorcycle(s): 1974 Honda CB550K0 W.I.P. Posts: A lot.	Running it without the baffle will make you run lean. The engine will run hotter and perform worse. It's possibly that if left like that long enough you could do permanent/expensive damage. __________________________________________________ Life's better on the Mountain.

June 1st, 2012, 11:04 PM	#4
Mountain Dew Ambrosia. Name: Jaymie Location: Oahu, Hawaii Join Date: Aug 2011 Motorcycle(s): 1974 Honda CB550K0 W.I.P. Posts: A lot.	I think he wanted to put the baffle back in, not keep it baffleless like that. I'm not sure how to put the baffle back in. __________________________________________________ Life's better on the Mountain.

June 2nd, 2012, 07:39 AM	#5
Motofool Daily Ninjette rider Name: Hernan Location: Florida Join Date: Mar 2011 Motorcycle(s): 2007 Ninja 250 Posts: A lot. MOTY - 2016, MOTM - Dec '12, Jan '14, Jan '15, May '16	Welcome to the site, Kenny! Ask the previous owner (OP) if he did anything else, like the things suggested by Thomas above. He could also tell you what work he did to remove the part. In that case you would need to reverse the work to take everything back to stock conditions. __________________________________________________ *Motofool* *.................................Never ride faster than your guardian angel can fly* "Mankind is composed of two sorts of men — those who love and create, and those who hate and destroy. Love is the bond between men, the way to teach and the center of the world." - José Martí

June 2nd, 2012, 09:43 AM	#6
Mountain Dew Ambrosia. Name: Jaymie Location: Oahu, Hawaii Join Date: Aug 2011 Motorcycle(s): 1974 Honda CB550K0 W.I.P. Posts: A lot.	Buy him a beer and see if he'll help you put it back in __________________________________________________ Life's better on the Mountain.

June 1st, 2012, 10:36 PM	#3
tmnamba ninjette.org newbie Name: Thomas Location: Hell Join Date: May 2012 Motorcycle(s): Ninja 250R Posts: 5	Mountain Dew is right, any alteration to the air flow, be it exhaust or intake will effect you. With the baffle removed it will run lean and most these bikes run lean from the manufacture. I would shim the carb needles if I were you or buy a jet kit and instal l that. You need to make your air fuel mixture more rich as now it is possible that it is lean. Posted via Mobile Device

June 2nd, 2012, 01:38 PM	#7
KenOnABike ninjette.org newbie Name: Kenny Location: South Louisiana Join Date: Jun 2012 Motorcycle(s): 2010 Blue 250r VROOOM Posts: 7	I talked to the guy and was able to reverse what he did. I had to buy a rivet gun for 30 bucks but now it's TIME TO RIDE!!! Thanks for the tips guys.

June 5th, 2012, 07:15 PM	#8
tmnamba ninjette.org newbie Name: Thomas Location: Hell Join Date: May 2012 Motorcycle(s): Ninja 250R Posts: 5	Glad to hear you got it figured out! Just out of curiosity did you notice any difference in sounds or performance between the two? Posted via Mobile Device

June 6th, 2012, 02:13 PM	#9
KenOnABike ninjette.org newbie Name: Kenny Location: South Louisiana Join Date: Jun 2012 Motorcycle(s): 2010 Blue 250r VROOOM Posts: 7	Huge difference in sound. The bike was... I'll say maybe 20% louder without the baffle and the pitch was a bit deeper. No noticeable difference in performance.

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