Would 300 headers be a good swap?

beniblanco · March 1st, 2015, 03:55 PM

Was wondering if anyone might have some insight on this. It would be an easy swap to do and the 300 headers are larger in diameter so I might see a very slight power gain with my leo vince gp corsa slip on.

Thoughts???

micoulisninja · March 1st, 2015, 03:58 PM

I think it would give a slight gain...does the end can made to fit 250 headers fit the 300 ones though?

beniblanco · March 1st, 2015, 04:35 PM

Yes the 250 and 300 exhaust cans fit the same. The difference on the 300 was just the exhaust bracket.

micoulisninja · March 1st, 2015, 04:46 PM

then I suggest you give it a try if the price is low! might not make a huge difference but 300 headers have improved flow to the 2fiddy's...

beniblanco · March 1st, 2015, 05:26 PM

I just might do it. I can get a used pair of 300 headers cheap and it might be a better option money wise then aftermarket headers. I had an option for a 300 full exhaust system used a while back but let it go as I thought it wouldn't work at the time. I wonder if anyone else has ever tried putting a full aftermarket 300 exhaust on a 250? Never came across anything in my searches.

micoulisninja · March 1st, 2015, 05:37 PM

Quote:

Originally Posted by beniblanco

I just might do it. I can get a used pair of 300 headers cheap and it might be a better option money wise then aftermarket headers. I had an option for a 300 full exhaust system used a while back but let it go as I thought it wouldn't work at the time. I wonder if anyone else has ever tried putting a full aftermarket 300 exhaust on a 250? Never came across anything in my searches.

inner diameters are same for aftermarket systems (I know that as a fact for the yoshi r77 system and the Leo Vince) -apart from few exceptions- the routing and length (extra length on 300 for more low end torque) is different however because of the 300's shape of the oil pan...
the 250 engine has room for any routing though because the lower case is more shallow and flat

beniblanco · March 1st, 2015, 08:15 PM

So if I went with a 300 oem header or a 300 aftermarket header for routing either one would be fine?

cuong-nutz · March 1st, 2015, 10:59 PM

Oil change might be interesting.

micoulisninja · March 1st, 2015, 11:52 PM

Quote:

Originally Posted by cuong-nutz

Oil change might be interesting.

well, challenging rather to say at least !

forgot all about the filter and oil drain position... you need to test on the bike to see wether it is worth fitting them... and that is of course for aftermarket system only...

gantt · March 2nd, 2015, 08:32 AM

when I had a stock can from a 300 on my 250 header, I had to use exhaust gasket material to take up the slack. the 300 can has a slightly larger diameter for exhaust inlet vs. 250. not a big deal. but not quite a plug-n-play thing.

beniblanco · March 2nd, 2015, 05:15 PM

Thanks for the pics it helps with figuring out what route to take. I agree changing the oil looks like it would be a bit tricky with the oem 300 header. The Leo Vince gp corsa full exhaust off a 300 looks like it might fit better. I wish they still sold it for the 250 as a full system. I have the gp corsa slip on for my 250 and I think it would match up with a 300 header.

Singh2jz · March 2nd, 2015, 05:50 PM

Yo there's someone selling their 300 header here if you want it. thought I'd let you know..

beniblanco · March 2nd, 2015, 06:14 PM

Thanks for the heads up but I have someone locally willing to sell the headers to me. My only problem is I just have to find the time and get them.

Hero Danny · March 2nd, 2015, 07:07 PM

The 300 system is waay better flowing than the 250's. Stock it sounds MUCH better too.

beniblanco · March 14th, 2015, 04:31 PM

I finally picked up the headers just waiting on the weather now.

red26 · March 15th, 2015, 06:10 AM

this should be good.
I am using 300 full system Scorpion on my 250, it fits but need to haggle a bit.

beniblanco · March 15th, 2015, 06:38 AM

Glad to hear.
I plan on matching it up with my Leo Vince gp corsa.

March 1st, 2015, 03:55 PM	#1
beniblanco ninjette.org member Name: B Location: Ontario, Canada Join Date: Apr 2012 Motorcycle(s): 2011 black Ninja 250r Posts: 114	Would 300 headers be a good swap? Was wondering if anyone might have some insight on this. It would be an easy swap to do and the 300 headers are larger in diameter so I might see a very slight power gain with my leo vince gp corsa slip on. Thoughts???

March 1st, 2015, 03:58 PM	#2
micoulisninja modaholic junkie Name: Nick Location: Athens, Greece Join Date: Sep 2012 Motorcycle(s): 2001 ZX-12R, 2009 ninja 345cc and plenty of others in the past... Posts: 438 Blog Entries: 2	I think it would give a slight gain...does the end can made to fit 250 headers fit the 300 ones though? __________________________________________________ If noone has tried it before, I will !!!

March 1st, 2015, 04:46 PM	#4
micoulisninja modaholic junkie Name: Nick Location: Athens, Greece Join Date: Sep 2012 Motorcycle(s): 2001 ZX-12R, 2009 ninja 345cc and plenty of others in the past... Posts: 438 Blog Entries: 2	then I suggest you give it a try if the price is low! might not make a huge difference but 300 headers have improved flow to the 2fiddy's... __________________________________________________ If noone has tried it before, I will !!!

March 1st, 2015, 10:59 PM	#8
cuong-nutz RIP Alex Name: Cuong Location: Houston, TX Join Date: Apr 2011 Motorcycle(s): '10 250r, '09 265r Posts: A lot. Blog Entries: 2	Oil change might be interesting. __________________________________________________ HalfFast Racing Team Serving Greater Houston Area Riders:WFO Riders MotoHouston HPC CMRA Ride Smart Fastline Lone Star Track Days

March 2nd, 2015, 05:50 PM	#12
Singh2jz ninjette.org certified postwhore Name: Inderveer Location: San Jose Join Date: Nov 2012 Motorcycle(s): '07 ex250-F/J Posts: A lot.	Yo there's someone selling their 300 header here if you want it. thought I'd let you know.. __________________________________________________ The Bike \| The Truck

March 1st, 2015, 04:35 PM	#3
beniblanco ninjette.org member Name: B Location: Ontario, Canada Join Date: Apr 2012 Motorcycle(s): 2011 black Ninja 250r Posts: 114	Yes the 250 and 300 exhaust cans fit the same. The difference on the 300 was just the exhaust bracket.

March 1st, 2015, 05:26 PM	#5
beniblanco ninjette.org member Name: B Location: Ontario, Canada Join Date: Apr 2012 Motorcycle(s): 2011 black Ninja 250r Posts: 114	I just might do it. I can get a used pair of 300 headers cheap and it might be a better option money wise then aftermarket headers. I had an option for a 300 full exhaust system used a while back but let it go as I thought it wouldn't work at the time. I wonder if anyone else has ever tried putting a full aftermarket 300 exhaust on a 250? Never came across anything in my searches.

March 1st, 2015, 08:15 PM	#7
beniblanco ninjette.org member Name: B Location: Ontario, Canada Join Date: Apr 2012 Motorcycle(s): 2011 black Ninja 250r Posts: 114	So if I went with a 300 oem header or a 300 aftermarket header for routing either one would be fine?

March 2nd, 2015, 08:32 AM	#10
gantt 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	when I had a stock can from a 300 on my 250 header, I had to use exhaust gasket material to take up the slack. the 300 can has a slightly larger diameter for exhaust inlet vs. 250. not a big deal. but not quite a plug-n-play thing.

March 2nd, 2015, 05:15 PM	#11
beniblanco ninjette.org member Name: B Location: Ontario, Canada Join Date: Apr 2012 Motorcycle(s): 2011 black Ninja 250r Posts: 114	Thanks for the pics it helps with figuring out what route to take. I agree changing the oil looks like it would be a bit tricky with the oem 300 header. The Leo Vince gp corsa full exhaust off a 300 looks like it might fit better. I wish they still sold it for the 250 as a full system. I have the gp corsa slip on for my 250 and I think it would match up with a 300 header.

March 2nd, 2015, 06:14 PM	#13
beniblanco ninjette.org member Name: B Location: Ontario, Canada Join Date: Apr 2012 Motorcycle(s): 2011 black Ninja 250r Posts: 114	Thanks for the heads up but I have someone locally willing to sell the headers to me. My only problem is I just have to find the time and get them.

March 2nd, 2015, 07:07 PM	#14
Hero Danny Inline 4!!! Name: Danny Location: MA Join Date: May 2014 Motorcycle(s): 2008 CBR600rr, 1987 KLR 250 Posts: A lot.	The 300 system is waay better flowing than the 250's. Stock it sounds MUCH better too. __________________________________________________ Be careful. Remember you are invisible

March 14th, 2015, 04:31 PM	#15
beniblanco ninjette.org member Name: B Location: Ontario, Canada Join Date: Apr 2012 Motorcycle(s): 2011 black Ninja 250r Posts: 114	I finally picked up the headers just waiting on the weather now.

March 15th, 2015, 06:10 AM	#16
red26 ninjette.org member Name: red Location: KL, Malaysia Join Date: Apr 2013 Motorcycle(s): Ninja 250R, GSXR600 K4, KX250F,NSR150SP, Yamaha TZM150 Posts: 68	this should be good. I am using 300 full system Scorpion on my 250, it fits but need to haggle a bit.

March 15th, 2015, 06:38 AM	#17
beniblanco ninjette.org member Name: B Location: Ontario, Canada Join Date: Apr 2012 Motorcycle(s): 2011 black Ninja 250r Posts: 114	Glad to hear. I plan on matching it up with my Leo Vince gp corsa.

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