ninjette.org

Go Back   ninjette.org > General > General Motorcycling Discussion

Notices

Reply
 
Thread Tools
Old September 2nd, 2014, 12:46 PM   #1
Ducati999
ninjette.org sage
 
Name: Ant
Location: Wooster
Join Date: Dec 2013

Motorcycle(s): Ducati 999 2012 Ninja 250r Ducati748 Yellow finally running 2003 SV650 S (SOLD)

Posts: 931
Velocity Stacks in airbox/stock filter

Has anyone tried velocity stacks with the stock airbox still on their bike. I have removed the Screen in the airbox and shimmed the needles but still have the stock air filter on my 2012 Ninja 250. I have cored out a stock exhaust and it sounds great, and i am working on removing the cat from the spare header pipe i have to see if it makes a difference. I have added stacks to the airbox of my SV and it helped but with the limited HP of the 250 i am unsure if it would make any difference. So has anyone tried this and if so what were your results?
Ducati999 is offline   Reply With Quote




Old September 4th, 2014, 02:58 AM   #2
Ducati999
ninjette.org sage
 
Name: Ant
Location: Wooster
Join Date: Dec 2013

Motorcycle(s): Ducati 999 2012 Ninja 250r Ducati748 Yellow finally running 2003 SV650 S (SOLD)

Posts: 931
Really, no one out there has tried this? I am making a set up right now and will see what the results are and if there is any noticeable difference.
Ducati999 is offline   Reply With Quote


Old September 4th, 2014, 03:39 AM   #3
Flying
ninjette.org sage
 
Name: -
Location: somewhere cold
Join Date: Jun 2013

Motorcycle(s): 2010 Ninja 250

Posts: 596
Blog Entries: 1
Who else to ask but @Racer x
Flying is offline   Reply With Quote


Old September 4th, 2014, 04:16 AM   #4
Racer x
ninjette.org certified postwhore
 
Racer x's Avatar
 
Name: Eric
Location: Iowa City
Join Date: May 2009

Motorcycle(s): 2008 Kawmeracchi 350 2010 Project X

Posts: A lot.
Blog Entries: 54
MOTM - Feb '16
I don't know. That's my answer. Theory is shorter exhaust track is better for high rpm power. And longer track is better for torque.

I don't think the air box without the metal fire guard is that bad. Especially for street. Nothing beats open stacks for power. But filters are nessacay. Clean filter is best.

As for the header. I would not bother with the stock pipe. Get
A Yoshamara full system. The pipes are very large. Large diameter pipes will flow better and that is the primary power gain you can get on a stock engine.
__________________________________________________
Top speed 123.369mph. Ohio mile
Worlds fastest 250 ninja
Racer x is offline   Reply With Quote


Old September 4th, 2014, 05:12 AM   #5
DaBlue1
Long Time Rider
 
DaBlue1's Avatar
 
Name: Blue
Location: Charlotte, NC
Join Date: Sep 2010

Motorcycle(s): 2009 Kawasaki Ninja 250R

Posts: A lot.
Quote:
Originally Posted by Ducati999 View Post
....I have removed the Screen in the airbox and shimmed the needles but still have the stock air filter on my 2012 Ninja 250. I have cored out a stock exhaust and it sounds great, and i am working on removing the cat from the spare header pipe i have to see if it makes a difference.

If you want more airflow with the stock airbox, try a much less restrictive air filter and bigger header pipe (as suggested by Racer X), it's much easier than hacking the stock one. Also keep in mind that you more than likely will want to increase your jet size a tiny bit. Experimentation is the key.
DaBlue1 is offline   Reply With Quote


Old September 4th, 2014, 05:36 AM   #6
Racer x
ninjette.org certified postwhore
 
Racer x's Avatar
 
Name: Eric
Location: Iowa City
Join Date: May 2009

Motorcycle(s): 2008 Kawmeracchi 350 2010 Project X

Posts: A lot.
Blog Entries: 54
MOTM - Feb '16
Thanks Blue I forgot that part.
Definitely need to rejet. Larger pilot 42 or 40 bigger main like 110 and move the needle around.
__________________________________________________
Top speed 123.369mph. Ohio mile
Worlds fastest 250 ninja
Racer x is offline   Reply With Quote


Old September 4th, 2014, 02:23 PM   #7
cuong-nutz
RIP Alex
 
cuong-nutz's Avatar
 
Name: Cuong
Location: Houston, TX
Join Date: Apr 2011

Motorcycle(s): '10 250r, '09 265r

Posts: A lot.
Blog Entries: 2
Do the intake boots even count as velocity stacks?
Attached Images
File Type: jpg $T2eC16FHJF4FFkvY7oPYBRdY)2iOrg~~60_57.jpg (66.8 KB, 3 views)
__________________________________________________
HalfFast Racing Team
Serving Greater Houston Area Riders:WFO Riders MotoHouston HPC CMRA Ride Smart Fastline Lone Star Track Days
cuong-nutz is offline   Reply With Quote


Old September 4th, 2014, 02:49 PM   #8
Ducati999
ninjette.org sage
 
Name: Ant
Location: Wooster
Join Date: Dec 2013

Motorcycle(s): Ducati 999 2012 Ninja 250r Ducati748 Yellow finally running 2003 SV650 S (SOLD)

Posts: 931
Quote:
Originally Posted by cuong-nutz View Post
Do the intake boots even count as velocity stacks?
Thanks for the replies! I built some stacks that simply attach to the stock stacks in the box. They are almost 3 inches long. I still have the (clean) stock filter and snorkel in place but the fire guard screen has been removed. I am still planning on trying the header pipe since it is just laying around and i can weld so cutting and experimenting will be fun. I dont know if the stacks have helped any but it feels a little better down low (may just be in my head) but i do not have a DYNO. I have really tall gearing on the bike along with the opened up stock exhaust and shimmed needles. I ran against a friend with a totally stock 2009 Ninja 250 and he could not beat me and i could not beat him. He is a newer rider but weighs 40 lbs less than me. Performance does not seem to be less so i will keep experimenting!
Ducati999 is offline   Reply With Quote


Reply




Similar Threads
Thread Thread Starter Forum Replies Last Post
Is this the stock ex250 airbox? baz666 1986 - 2007 Ninja 250R Tech Talk 5 March 23rd, 2014 12:58 PM
WTB Stock Undertail, Stock Airbox 08+ krolinked Items Wanted 0 October 15th, 2012 01:04 AM
Pod air filter vs drilled airbox ??? Tiane 2008 - 2012 Ninja 250R Tech Talk 18 September 17th, 2012 06:41 AM
Stock tire, airbox, passenger pegs, stock right rearset, cowl shroud ninja250 Motorcycle-related 6 August 17th, 2011 10:33 AM
FI Bike Remove Airbox or performance air filter menno 2008 - 2012 Ninja 250R Tech Talk 3 October 5th, 2010 02:01 PM


Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


Motorcycle Safety Foundation

All times are GMT -7. The time now is 08:59 AM.


remote server monitor
Powered by vBulletin®
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
User Alert System provided by Advanced User Tagging (Lite) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Except where otherwise noted, all site contents are Copyright 2016 ninjette.org, All rights reserved.