ninjette.org

Go Back   ninjette.org > 1986 - 2007 Ninja 250R > 1986 - 2007 Ninja 250R Tech Talk

Reply
 
Thread Tools
Old March 29th, 2015, 10:09 AM   #1
BartZerv579
ninjette.org newbie
 
Name: Bart
Location: Grand Rapids, MI
Join Date: Mar 2015

Motorcycle(s): 1995 Kawasaki Ninja EX250F

Posts: 3
Rough Idle

Hey all,

I am completely lost here and could really use some helpful insight.

I have a 1995 Ninja 250, and when I bought it, it had a rough idle. It only idles over 3k RPM, and below that, it just sort of dies out. I assumed it was just the carbs that were a little gunked up, so after I bought it I went through the carbs and that didn't seem to help. I went through them a second time, blowing carb cleaner and cleaning out all jets and any places that could possibly have gunk in them. This still didnt seem to work. I did some research and read that this might be tight valves, so I went through and adjusted the valve clearance on all the intake and exhaust valves. I put the radiator and the tank back on and started her up, and it seemed like it wanted to idle better at about 2k or so, but it sounded loud and there was a sort of clunking sound coming from the engine. Im at a loss here! Any suggestions or diagnoses are greatly appreciated! I just dont know what else it could possibly be, or what I could do.
BartZerv579 is offline   Reply With Quote




Old March 29th, 2015, 10:21 AM   #2
ieathonda
ninjette.org member
 
ieathonda's Avatar
 
Name: William
Location: Houston
Join Date: Feb 2015

Motorcycle(s): Ninja EX250F

Posts: 110
Try adjusting the mixture screws. There is a write up on the ninja wiki: http://faq.ninja250.org/wiki/How_do_...dle_mixture%3F
ieathonda is offline   Reply With Quote


Old March 29th, 2015, 10:34 AM   #3
BartZerv579
ninjette.org newbie
 
Name: Bart
Location: Grand Rapids, MI
Join Date: Mar 2015

Motorcycle(s): 1995 Kawasaki Ninja EX250F

Posts: 3
Quote:
Originally Posted by ieathonda View Post
Try adjusting the mixture screws. There is a write up on the ninja wiki: http://faq.ninja250.org/wiki/How_do_...dle_mixture%3F
I've heard about doing that before! I'm about to go through and recheck the clearances again, and if that doesn't work I'll for sure give the mixture screws a try.

Thanks!
BartZerv579 is offline   Reply With Quote


Old March 29th, 2015, 11:14 AM   #4
ieathonda
ninjette.org member
 
ieathonda's Avatar
 
Name: William
Location: Houston
Join Date: Feb 2015

Motorcycle(s): Ninja EX250F

Posts: 110
Make sure to measure the valve clearances before and after your tighten the rocker arm nuts down. They mo e a bit after adjustment. I had to check a few times over to be sure myself.
ieathonda is offline   Reply With Quote


Old March 29th, 2015, 11:53 AM   #5
Ghostt
in your machine
 
Ghostt's Avatar
 
Name: Scott
Location: Summer Shade, Ky.
Join Date: Oct 2014

Motorcycle(s): 98 Ninja 250/F12 aka ZX-2R "SERENITY", 91 Ninja 500/A5 aka ZX-5R "Phoenix", 84 Honda GL1200A "SIREN"

Posts: A lot.
Blog Entries: 25
MOTM - Jun '17, May '16, Mar '15
You need to do a through and meticulous carburetor cleaning, servicing, and adjusting, check for vacuum leaks and then possibly a value adjustment, but you need to be 100% sure the carburetors are right, otherwise your chasing your tail so to speak.


My quick how-to on idle adjustment



Quote:
Your initial setting should be 3 full turns out from the bottom, remember just slightly tighten them, don't go all Conan on them, due to they are brass and the tip can be damaged by over- tightening.



Then warm it up, slowly turn 1 side pilot screw in until the rpms drop, then back out till RPM's peak (and no further)* Twist throttle...see how it reacts...tweak to taste.
Repeat on other side... test ride. You're looking for best throttle response and transition from just cracked to 1/4 throttle opening or so.*

Thats a quickie, 10 cent tutorial on setting pilot screws.**
__________________________________________________
violente et ignorantia

ZX-2R BLOG
Twitter and Instagram = Ghostt_Scott
I'm not here to change your mind, just to inform.
Ghostt is offline   Reply With Quote


Reply




Similar Threads
Thread Thread Starter Forum Replies Last Post
Rough and Low Idle RiderOnTheStorm 2008 - 2012 Ninja 250R Tech Talk 4 March 26th, 2012 07:52 PM
[hell for leather] - Rough Idle: the motorcycle industry’s chances in the global debt Ninjette Newsbot Motorcycling News 0 August 9th, 2011 02:00 PM
[crash.net - MotoGP] - How rough is Moto2? This rough… Ninjette Newsbot Motorcycling News 0 October 1st, 2010 09:10 AM
[crash.net - MotoGP] - How rough is Moto2? This rough… Ninjette Newsbot Motorcycling News 0 October 1st, 2010 09:00 AM
Rough Idle BSNinja250 2008 - 2012 Ninja 250R Tech Talk 2 May 18th, 2010 09:35 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 09:23 AM.


Website uptime monitoring Host-tracker.com
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 ninjette.org, All rights reserved.