Go Back > 1986 - 2007 Ninja 250R > 1986 - 2007 Ninja 250R Tech Talk

Thread Tools
Old December 20th, 2023, 08:37 PM   #1
JayStreetfighter04 newbie
Name: Jeremy
Location: 1513 Hotiyee Ave
Join Date: Dec 2023

Motorcycle(s): 04 ninja 250

Posts: 7
No airbox

Just got a decent deal on a running bike. It runs but bogs down when quickly throttling. While looking around the bike I realized there is no airbox and the air filters are directly connected to the carb with black tape around them. Is this the first thing I should replace or do I need to look elsewhere? super noob here so please be gentle.
JayStreetfighter04 is offline   Reply With Quote

Old December 21st, 2023, 07:34 AM   #2
Rev Limiter
jkv45's Avatar
Name: Jay
Location: WI
Join Date: Jul 2013

Motorcycle(s): '06 SV650n, '00 Derbi GPR, '64 CA77 Dream 305, '70 CL450 Scrambler, numerous dirt bikes

Posts: A lot.
MOTM - Jun '18, Oct '16

Yes - you are on the right track.

Most will agree that the engine runs best with an original airbox.

In addition, it's very possible you may need to remove and clean the carbs, which requires some patience and research to do it properly the first time.

You can try installing an airbox and doing some basic tuning of the idle mixture screws, then test riding to see if the carbs need attention.

The carb type on the Ninja, a Constant Velocity (CV), doesn't like to be whacked-open quickly. They work much better with a smooth roll-on of the throttle, even when properly tuned.

Make sure the fuel is fresh, and you have a good fully charged battery, before doing any testing.
jkv45 is offline   Reply With Quote

2 out of 2 members found this post helpful.

Similar Threads
Thread Thread Starter Forum Replies Last Post
take out airbox? Japowger 2008 - 2012 Ninja 250R Tech Talk 8 October 15th, 2018 04:50 AM
Should there be a hole in the airbox? rustyshackelford 1986 - 2007 Ninja 250R Tech Talk 7 September 23rd, 2018 09:54 PM
Airbox james250ninja 1986 - 2007 Ninja 250R Tech Talk 1 February 23rd, 2017 08:02 PM
'08+ Airbox Countersteer Motorcycle-related 0 June 10th, 2012 12:50 PM
Airbox installation greenaero 1986 - 2007 Ninja 250R Tech Talk 3 March 18th, 2012 09:51 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 12:15 AM.

Website uptime monitoring
Powered by vBulletin®
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
User Alert System provided by Advanced User Tagging (Lite) - vBulletin Mods & Addons Copyright © 2024 DragonByte Technologies Ltd.
Except where otherwise noted, all site contents are Copyright 2022, All rights reserved.