Top Exhaust + Intake + Jet option

675Raisinator · November 29th, 2011, 07:16 PM

I notice most racers use area p ... I am assuming full area P + jet + k&n filter is one of the best options out there ... but I keep thinking the full Jardine system would be lighter overall... weight savings would probably trump the modest hp gains... basically what im asking is what is the best overall combo intake/exhaust for racing... and i apologize if this is a repost

Alex · November 29th, 2011, 11:21 PM

It is.

Search on "jetting database" for a long thread that has a whole bunch of people's different jetting setups and how they worked out for them. For exhaust, a full system is the way to go, and people have gotten good results from Area P, Yoshi, Graves, and likely a few more. There isn't going to be a huge difference in power among any of the top brands. Dyno tuning the bike to make sure the jetting is spot on for the conditions will maximize the gains for that particular bike.

sowega · November 30th, 2011, 07:25 AM

The backstraight at Road Atlanta tells me that Area P long pipe is the best choice.

675Raisinator · November 30th, 2011, 07:33 AM

hahaha i see what is the advantage of long pipe?

Rexbo · November 30th, 2011, 07:56 AM

I made 31 hp at sea level on a completely stock engine with 14k miles with just an air filter + jet kit + exhaust from Matt @ Sportisimoto and an hour of dyno time. I'm sure there's more to be had if you mill the head and change cam timing and such, but if you don't want to touch anything internally most combinations will get you above 30 hp which is enough to keep you in the game it seems in most production race classes.

675Raisinator · November 30th, 2011, 11:33 AM

thank you for the help rexbo... what air filter do you use?

NorCal_250R · December 17th, 2011, 05:07 PM

The Leo Vince makes some of the best HP and doesn't hurt the bottom and mid range...just make sure to use the solid sound core...

Seen the system for about $400.

Get a BMC filter and Dynojet Jet Kit...DONE!

November 29th, 2011, 07:16 PM	#1
675Raisinator ninjette.org member Name: Zander the Expander Location: Houston, Texas Join Date: Nov 2011 Motorcycle(s): 2010 Kawasaki 250 (Track scooter) 2012 Triumph Daytona 675 Posts: 153	Top Exhaust + Intake + Jet option I notice most racers use area p ... I am assuming full area P + jet + k&n filter is one of the best options out there ... but I keep thinking the full Jardine system would be lighter overall... weight savings would probably trump the modest hp gains... basically what im asking is what is the best overall combo intake/exhaust for racing... and i apologize if this is a repost

November 29th, 2011, 11:21 PM	#2
Alex ninjette.org dude Name: 1 guess :-) Location: SF Bay Area Join Date: Jun 2008 Motorcycle(s): '13 Ninja 300 (white, the fastest color!), '13 R1200RT, '14 CRF250L, '12 TT-R125LE Posts: Too much. Blog Entries: 7	It is. Search on "jetting database" for a long thread that has a whole bunch of people's different jetting setups and how they worked out for them. For exhaust, a full system is the way to go, and people have gotten good results from Area P, Yoshi, Graves, and likely a few more. There isn't going to be a huge difference in power among any of the top brands. Dyno tuning the bike to make sure the jetting is spot on for the conditions will maximize the gains for that particular bike. __________________________________________________ Montgomery Street Motorcycle Club / cal24.com / crf250l.org / ninjette.org ninjette.org Terms of Service Shopping for motorcycle parts or equipment? Come here first. The friendliest Ninja 250R/300/400 forum on the internet! (especially Unregistered)

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November 30th, 2011, 07:25 AM	#3
sowega ninjette.org guru Name: Ed Location: Atlanta, GA Join Date: Mar 2011 Motorcycle(s): 899, 748, 250, 250, 70 Posts: 348	The backstraight at Road Atlanta tells me that Area P long pipe is the best choice.

November 30th, 2011, 07:33 AM	#4
675Raisinator ninjette.org member Name: Zander the Expander Location: Houston, Texas Join Date: Nov 2011 Motorcycle(s): 2010 Kawasaki 250 (Track scooter) 2012 Triumph Daytona 675 Posts: 153	hahaha i see what is the advantage of long pipe?

November 30th, 2011, 07:56 AM	#5
Rexbo CVMA / AFM / M1GP #250 Name: Steve Location: Los Angeles Join Date: Sep 2009 Motorcycle(s): 2009 Ninja 250r, 2011 Zero S, 2009 KLR 650 Posts: A lot.	I made 31 hp at sea level on a completely stock engine with 14k miles with just an air filter + jet kit + exhaust from Matt @ Sportisimoto and an hour of dyno time. I'm sure there's more to be had if you mill the head and change cam timing and such, but if you don't want to touch anything internally most combinations will get you above 30 hp which is enough to keep you in the game it seems in most production race classes.

November 30th, 2011, 11:33 AM	#6
675Raisinator ninjette.org member Name: Zander the Expander Location: Houston, Texas Join Date: Nov 2011 Motorcycle(s): 2010 Kawasaki 250 (Track scooter) 2012 Triumph Daytona 675 Posts: 153	thank you for the help rexbo... what air filter do you use?

December 17th, 2011, 05:07 PM	#7
NorCal_250R ninjette.org member Name: Jordan Location: Corte Madera Join Date: Jun 2009 Motorcycle(s): 06 Ninja 650R, 08 Ninja 250R, 00 Aprilia SR50 (dead) Posts: 94	The Leo Vince makes some of the best HP and doesn't hurt the bottom and mid range...just make sure to use the solid sound core... Seen the system for about $400. Get a BMC filter and Dynojet Jet Kit...DONE!