ninjette.org

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

Notices

Reply
 
Thread Tools
Old October 4th, 2018, 08:17 AM   #1
ajax_ayxh
ninjette.org newbie
 
Name: andrew
Location: sydney
Join Date: Jan 2016

Motorcycle(s): 07 GPX 250

Posts: 3
rear suspension question

Hi All,

So a few weeks ago, my ninja started making creaky noises when the rear suspension rebounded, and there were even a few times where it seized up (but magically fixed itself).

I started taking the bike apart thinking I would find a mess of rusty/worn linkages and swingarm needle bearings, but they all seemed...fine. Lubed them all up and the creaking still remained. There was one thing I saw that I wasn't sure of though, and would appreciate some knowledge/wisdom.

The top hole of the rear shock absorber - is there a bushing in there that is supposed to swivel and be able to be removed/cleaned? The parts diagram seems to suggest yes but looks to be a rubber bushing (part no. 92075, noted as 'damper') mine is in there *TIGHT* with a bit of gunk around the edge.
Attached Images
File Type: png 687px-SUSPENSION_SHOCK_ABSORBER.png (325.2 KB, 3 views)
ajax_ayxh is offline   Reply With Quote




Old October 4th, 2018, 09:45 AM   #2
greg737
-
 
Name: -
Location: -
Join Date: May 2009

Motorcycle(s): -

Posts: A lot.
Yes, the EX250 suspension can "creak".

And, yes, you should give the rear suspension (both the swinging arm and the Uni-Trak linkage) some love and attention. That's just an example of good "ongoing maintenance".

However, you may want to read this old thread over on Ninja250.org

https://forums.ninja250.org/viewtopi...light=creaking

It's known that over time the EX250's Engine Mounting Bolts will loosen up (probably due to the constant high-frequency vibrations produced by engine's high-revving nature).

There are 3 Engine Mounting Bolts (1 front and 2 rear) and the rear 2 bolts are the ones that are more often found to be loose (sometimes the retaining nut will even be missing off the other end of the bolt).

Check these and let us know what you find.
greg737 is offline   Reply With Quote


Old October 4th, 2018, 09:50 AM   #3
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, 2002 EX250

Posts: A lot.
MOTM - Oct '16
Quote:
Originally Posted by greg737 View Post
It's known that over time the EX250's Engine Mounting Bolts will loosen up (probably due to the constant high-frequency vibrations produced by engine's high-revving nature).

There are 3 Engine Mounting Bolts (1 front and 2 rear) and the rear 2 bolts are the ones that are found to be loose more often (sometimes the nut will even be missing off the other end of the bolt).

I've found this to be the creaking noise on a couple of my Ninjas, I can usually make the creaking noises by holding the front brake and lightly rocking the bike back and forth. Tightened the bolts and creaking was gone.
__________________________________________________
top of the day to ya Unregistered
Z1R rider is offline   Reply With Quote


Old October 4th, 2018, 02:37 PM   #4
ajax_ayxh
ninjette.org newbie
 
Name: andrew
Location: sydney
Join Date: Jan 2016

Motorcycle(s): 07 GPX 250

Posts: 3
Oh wow I had no idea, thanks both. Definitely will look into this as the likely culprit as a few other bolts have loosened in the last few thousand kms - my side stand was hanging at one point.
ajax_ayxh is offline   Reply With Quote


Old October 5th, 2018, 10:12 AM   #5
CaliGrrl
ninjette.org certified postwhore
 
CaliGrrl's Avatar
 
Name: Kerry
Location: Ventura, CA
Join Date: Jan 2016

Motorcycle(s): Ninja250

Posts: A lot.
MOTM - Apr '18, Apr '17, Apr '16
You might want to mark a few of the more important bolts with a paint marker so you can easily see if they're loosening up.
CaliGrrl is offline   Reply With Quote


Old October 5th, 2018, 10:14 PM   #6
DannoXYZ
ninjette.org certified postwhore
 
Name: AKA JacRyann
Location: SF East Bay
Join Date: Dec 2011

Motorcycle(s): CB125T, Ninja250R racer, Ninja250R street bike, EX250F#1, EX250F#2, VF500F, CBR600RR

Posts: A lot.
MOTM - Nov '17
Blue Loctite is your friend...
DannoXYZ is offline   Reply With Quote


Old November 14th, 2018, 05:30 AM   #7
ajax_ayxh
ninjette.org newbie
 
Name: andrew
Location: sydney
Join Date: Jan 2016

Motorcycle(s): 07 GPX 250

Posts: 3
Sorry to revive this old thread, but I finally got time to fix the problem and hopefully explaining the symptoms in more detail might help someone else later on.

In my case, swapping out the shock for a replacement (ninja 300) got rid of my creaking/suspension problems. What i was experiencing was:

-creaking/dirt on metal grinding noise in the latter half of compressing the bike down (spring fully compressed) , and similarly when releasing it and the tail springing back up.

-shock was a bit slower on rebound than usual, which was noticeable especially when going over bumpy roads

I'm guessing the issue was the oil in the shock, which is probably sludge at this point. Well another lesson learnt for me!
ajax_ayxh is offline   Reply With Quote


Old November 14th, 2018, 06:12 AM   #8
Triple Jim
Guy Who Enjoys Riding
 
Triple Jim's Avatar
 
Name: Jim
Location: North Central North Carolina
Join Date: Jul 2016

Motorcycle(s): Ninja 250

Posts: A lot.
MOTM - Oct '18, Aug '17, Aug '16
Thanks for the update Andrew. I'm glad things are working better now.
Triple Jim is offline   Reply With Quote


Old November 15th, 2018, 09:47 AM   #9
DannoXYZ
ninjette.org certified postwhore
 
Name: AKA JacRyann
Location: SF East Bay
Join Date: Dec 2011

Motorcycle(s): CB125T, Ninja250R racer, Ninja250R street bike, EX250F#1, EX250F#2, VF500F, CBR600RR

Posts: A lot.
MOTM - Nov '17
Dissect that old shock! Would be interesting to see what its insides look like!
DannoXYZ is offline   Reply With Quote


Reply




Similar Threads
Thread Thread Starter Forum Replies Last Post
Question on race suspension krolinked Ninjettes At Speed 15 September 4th, 2014 01:19 PM
suspension question tac12345 2008 - 2012 Ninja 250R Tech Talk 5 September 13th, 2012 09:27 AM
[motorcyclistonline] - Europe on the Cheap, Crash Damage and Rear Suspension Question Ninjette Newsbot Motorcycling News 0 August 2nd, 2011 07:00 PM
Suspension Question Sailariel 2008 - 2012 Ninja 250R Tech Talk 10 November 10th, 2010 09:01 PM
Suspension Question Rawr 2008 - 2012 Ninja 250R Tech Talk 2 April 30th, 2009 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 10:58 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.