ninjette.org

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

Reply
 
Thread Tools
Old November 6th, 2016, 02:54 PM   #1
acook3323
ninjette.org member
 
Name: Adam
Location: logan
Join Date: Nov 2016

Motorcycle(s): 2005 ninja 250

Posts: 74
One cylinder not firing

Hey guys I have a 2005 ninja 250 the California model with 6600 miles on it. I'm struggling getting the bike started. It has new plugs that have spark,timing has been checked and is good, cleaned carbs, and replaced battery, seems to have good compression from both cylinders. When I unplug the boot from the left side plug it starts and idles rough but I have no throttle response at all. When both plug boots are on it struggles to start up and seems to backfire. Has anyone had this issue or have any advice? Thanks
acook3323 is offline   Reply With Quote




Old November 6th, 2016, 05:01 PM   #2
Z1R rider
ninjette.org certified postwhore
 
Z1R rider's Avatar
 
Name: Roger
Location: Mitchell, South Dakota
Join Date: Apr 2014

Motorcycle(s): 1978 Z1R, 1999 EX250(GPz), 2000 EX250

Posts: A lot.
MOTY - 2018, MOTM - Oct '16
Just for fun, try switching the plug wires.


Welome to the board.
__________________________________________________
top of the day to ya Unregistered
Z1R rider is offline   Reply With Quote


Old November 6th, 2016, 05:24 PM   #3
acook3323
ninjette.org member
 
Name: Adam
Location: logan
Join Date: Nov 2016

Motorcycle(s): 2005 ninja 250

Posts: 74
Thanks! Done that same result unfortunately.
acook3323 is offline   Reply With Quote


Old November 6th, 2016, 05:29 PM   #4
Motofool
Daily Ninjette rider
 
Motofool's Avatar
 
Name: Hernan
Location: Florida
Join Date: Mar 2011

Motorcycle(s): 2007 Ninja 250

Posts: A lot.
MOTY - 2016, MOTM - Dec '12, Jan '14, Jan '15, May '16
Cool

Quote:
Originally Posted by acook3323 View Post
.......... timing has been checked and is good.........
Welcome, Adam !!!

Do you refer to the timing of the valves?
__________________________________________________
Motofool
.................................Never ride faster than your guardian angel can fly
"Mankind is composed of two sorts of men — those who love and create, and those who hate and destroy. Love is the bond between men, the way to teach and the center of the world." - José Martí
Motofool is offline   Reply With Quote


Old November 6th, 2016, 05:31 PM   #5
acook3323
ninjette.org member
 
Name: Adam
Location: logan
Join Date: Nov 2016

Motorcycle(s): 2005 ninja 250

Posts: 74
Pulled cylinder head cover off checked cam timing marks and chain links and everything met spec
acook3323 is offline   Reply With Quote


Old November 6th, 2016, 05:35 PM   #6
Motofool
Daily Ninjette rider
 
Motofool's Avatar
 
Name: Hernan
Location: Florida
Join Date: Mar 2011

Motorcycle(s): 2007 Ninja 250

Posts: A lot.
MOTY - 2016, MOTM - Dec '12, Jan '14, Jan '15, May '16
Cool

Quote:
Originally Posted by acook3323 View Post
Pulled cylinder head cover off checked cam timing marks and chain links and everything met spec
Did you verified the gap of each valve was within specs?
__________________________________________________
Motofool
.................................Never ride faster than your guardian angel can fly
"Mankind is composed of two sorts of men — those who love and create, and those who hate and destroy. Love is the bond between men, the way to teach and the center of the world." - José Martí
Motofool is offline   Reply With Quote


Old November 6th, 2016, 05:39 PM   #7
acook3323
ninjette.org member
 
Name: Adam
Location: logan
Join Date: Nov 2016

Motorcycle(s): 2005 ninja 250

Posts: 74
Haven't as I don't really know how to do it because ive never had to do it! Is it simple to do?
acook3323 is offline   Reply With Quote


Old November 6th, 2016, 05:53 PM   #8
Motofool
Daily Ninjette rider
 
Motofool's Avatar
 
Name: Hernan
Location: Florida
Join Date: Mar 2011

Motorcycle(s): 2007 Ninja 250

Posts: A lot.
MOTY - 2016, MOTM - Dec '12, Jan '14, Jan '15, May '16
Cool

Quote:
Originally Posted by acook3323 View Post
Haven't as I don't really know how to do it because ive never had to do it! Is it simple to do?
It is something that should be done every 6000 miles.

It is easy if you have a shaded place to work and some basic tools.
This is how to:
http://faq.ninja250.org/wiki/How_do_..._the_valves%3F

http://n4mwd.blogspot.com/2013/06/ov...ts-during.html

Backfiring may be caused, among other things, by some loose electrical connector in the ignition circuit:
http://faq.ninja250.org/wiki/Wiring_...s_%26_diagrams

Having no throttle response at all sounds like broken diaphragms of the carbs or incorrectly installed needles:
http://faq.ninja250.org/wiki/How_do_...n_the_carbs%3F

__________________________________________________
Motofool
.................................Never ride faster than your guardian angel can fly
"Mankind is composed of two sorts of men — those who love and create, and those who hate and destroy. Love is the bond between men, the way to teach and the center of the world." - José Martí
Motofool is offline   Reply With Quote


Old November 6th, 2016, 06:00 PM   #9
acook3323
ninjette.org member
 
Name: Adam
Location: logan
Join Date: Nov 2016

Motorcycle(s): 2005 ninja 250

Posts: 74
Thanks for your help. We will see how it goes! Fingers crossed!
acook3323 is offline   Reply With Quote


Old November 6th, 2016, 06:03 PM   #10
Motofool
Daily Ninjette rider
 
Motofool's Avatar
 
Name: Hernan
Location: Florida
Join Date: Mar 2011

Motorcycle(s): 2007 Ninja 250

Posts: A lot.
MOTY - 2016, MOTM - Dec '12, Jan '14, Jan '15, May '16
Cool

Quote:
Originally Posted by acook3323 View Post
Thanks for your help. We will see how it goes! Fingers crossed!
You are welcome

A bonus:
https://www.ninjette.org/forums/showthread.php?t=151139

Those are basic things to check, just to achieve at least combustion inside the chambers: air, fuel, compression and a healthy reliable spark.
__________________________________________________
Motofool
.................................Never ride faster than your guardian angel can fly
"Mankind is composed of two sorts of men — those who love and create, and those who hate and destroy. Love is the bond between men, the way to teach and the center of the world." - José Martí
Motofool is offline   Reply With Quote


Old November 6th, 2016, 06:05 PM   #11
acook3323
ninjette.org member
 
Name: Adam
Location: logan
Join Date: Nov 2016

Motorcycle(s): 2005 ninja 250

Posts: 74
So with the now throttle response I pulled the diaphragms out and the spring on that side was bent and kind of screwed up could that be the issue there?
acook3323 is offline   Reply With Quote


Old November 6th, 2016, 06:11 PM   #12
Motofool
Daily Ninjette rider
 
Motofool's Avatar
 
Name: Hernan
Location: Florida
Join Date: Mar 2011

Motorcycle(s): 2007 Ninja 250

Posts: A lot.
MOTY - 2016, MOTM - Dec '12, Jan '14, Jan '15, May '16
Cool

Quote:
Originally Posted by acook3323 View Post
So with the now throttle response I pulled the diaphragms out and the spring on that side was bent and kind of screwed up could that be the issue there?
It could be.
Those diaphragms are activated by the vacuum of the engine and move those tapered needles up and down, which allows more or less fuel into the stream of air being drawn into the cylinders.

This is how the CV (constant velocity) carburetors work:

Link to original page on YouTube.

__________________________________________________
Motofool
.................................Never ride faster than your guardian angel can fly
"Mankind is composed of two sorts of men — those who love and create, and those who hate and destroy. Love is the bond between men, the way to teach and the center of the world." - José Martí
Motofool is offline   Reply With Quote


Reply




Similar Threads
Thread Thread Starter Forum Replies Last Post
Cylinder 2 Misfiring / Not firing / Unpredictable juliusmichaelhonrada 1986 - 2007 Ninja 250R Tech Talk 41 July 23rd, 2016 05:42 AM
'10 Ninja 250 Not Firing on One Cylinder... fallerd 2008 - 2012 Ninja 250R Tech Talk 9 October 22nd, 2014 09:51 PM
HELP 03 ex250 left cylinder not firing MistahT 1986 - 2007 Ninja 250R Tech Talk 19 October 22nd, 2013 06:20 PM
back firing rabies 1986 - 2007 Ninja 250R Tech Talk 9 November 23rd, 2012 04:02 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 04:01 AM.


remote server monitor
Powered by vBulletin®
Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.
User Alert System provided by Advanced User Tagging (Lite) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
Except where otherwise noted, all site contents are © Copyright 2020 ninjette.org, All rights reserved.