Whats up with my suspension?? and power?? - Kawasaki ZX-10R.net
 2Likes
Reply
 
LinkBack Thread Tools Display Modes
post #1 of 16 Old 07-25-2017, 01:53 AM Thread Starter
Squid
 
Join Date: Jul 2017
Posts: 9
Posting Frequency
 
Whats up with my suspension?? and power??

Hi All,

I've had my ZX10R for 6 months odd now and love it however I've encountered a few issues.

So I took it for MOT yesterday and it failed The suspension goes down when you push it down however it only creeps back up slowly, you can also see that it has bottomed out at some point too. The one fork seal is weeping. what is the likely cause of this before I tear it apart tomorrow, are the spring prone to weakening or maybe the bushes or seal is causing a bit of stiction?


The other issue is... the engine pulls fine to about 8k rpm then feel like its stuttering all the way to red line (this is intermittent) the pick picks up when you let off the throttle.. I've got my money on the fuel pump or filter (I removed the pump before and blew the filter which had quite a bit of resistance however the pump and tank were spotless).

Was thinking of removing the black fuel pump filter and fitting an inline fuel filter, can that be easily done with a bit of tubing?

So all in all... I have a slow bike that handles like a plank of wood.

all help appreciated :(
paul4wolves is offline  
Sponsored Links
Advertisement
 
post #2 of 16 Old 07-25-2017, 01:55 AM Thread Starter
Squid
 
Join Date: Jul 2017
Posts: 9
Posting Frequency
 
ZX10R 05 model with 38k on the clock, as far as the documents go it doesn't have any work done on the suspension, springs etc
paul4wolves is offline  
post #3 of 16 Old 07-25-2017, 02:10 AM
Street Rider
 
Join Date: Jul 2008
Location: sunnyvale, ca
Posts: 97
Posting Frequency
 
Garage
that thing is in dire need of a full suspension service. Rear shock probably has no gas left in it, and the oil probably looks like mud. The front forks also probably look like mud in addition to losing oil through the seals. Around here you can get both serviced for about $500 total.

No need for an inline filter. Im not sure about the sputtering but you could try removing the pump and cleaning the pickup. Personally i'd start with all the basic maintenance items like plugs, valve adjustment, air filter, suspension service.
JayBoCC2 is offline  
 
post #4 of 16 Old 07-25-2017, 02:17 AM Thread Starter
Squid
 
Join Date: Jul 2017
Posts: 9
Posting Frequency
 
Thanks for your response, Will have a look into it, the rear shock is aftermarket and will take the legs off and have a look.

I've tried the plugs, air filter, not looked at the valves yet. I tested to see how much fuel the pump supplied and it produced about 78ml in the 4 seconds (just over the specified 76ml in the manual) I thought the filter may be causing the pump to struggle as it may be clogged up?
paul4wolves is offline  
post #5 of 16 Old 07-25-2017, 10:24 AM
GP Rider
 
evallarta1's Avatar
 
Join Date: Jul 2007
Location: Collinsville IL (by St Louis)
Posts: 1,428
Posting Frequency
      
Quote:
Originally Posted by paul4wolves View Post
Hi All,

I've had my ZX10R for 6 months odd now and love it however I've encountered a few issues.

So I took it for MOT yesterday and it failed The suspension goes down when you push it down however it only creeps back up slowly, you can also see that it has bottomed out at some point too. The one fork seal is weeping. what is the likely cause of this before I tear it apart tomorrow, are the spring prone to weakening or maybe the bushes or seal is causing a bit of stiction?
A blown shock will not "creep". It will have zero damping and will pogo when pushed on. Stiction will also not creep, it will jump up the fork as stiction is not a constant. It sounds like the rebound may be all the way closed. A quick check is open the rebound all the way and see if the fork starts to move. Too much rebound can also help the fork bottom easier. Start with the easy stuff first, then move more in depth. If the bushing was an issue you would see grooves on your lower tubes and hear the grinding when you pushed on the forks.

A weeping seal could be caused by any number of things. You could try cleaning out the seals and see if that helps, but otherwise you'll want to change them. Keep in mind oil coming out of the fork is not the issue. If/when the oil hits your brake pads you will have zero stopping power and you'll have bigger issues than a leaky seal.
LDH likes this.

Stupidity and Motivation are a dangerous combination

Velocity Calibrations
evallarta1 is offline  
post #6 of 16 Old 07-26-2017, 07:06 AM Thread Starter
Squid
 
Join Date: Jul 2017
Posts: 9
Posting Frequency
 
Right, so I've backed all the adjustments off on the forks and it moves a bit more freely however now when I pump hard I can hear a metal on metal sound and thr suspension still isn't right, I'm assuming the bushes are toast and I've rang Kawasaki and they said they come with the stantion
paul4wolves is offline  
post #7 of 16 Old 07-26-2017, 10:36 AM
GP Rider
 
evallarta1's Avatar
 
Join Date: Jul 2007
Location: Collinsville IL (by St Louis)
Posts: 1,428
Posting Frequency
      
Quote:
Originally Posted by paul4wolves View Post
Right, so I've backed all the adjustments off on the forks and it moves a bit more freely however now when I pump hard I can hear a metal on metal sound and thr suspension still isn't right, I'm assuming the bushes are toast and I've rang Kawasaki and they said they come with the stantion
Correct, the bushings are pressed in the tube. But before you worry about the bushings pull the forks apart and see what is rubbing. It could be something simple.

Also the scrapping sound COULD just be the springs rubbing against the inside of the tube. This is a fairly common issue because the spring shifts and is not centered in the fork tube.

Stupidity and Motivation are a dangerous combination

Velocity Calibrations
evallarta1 is offline  
post #8 of 16 Old 07-27-2017, 04:19 AM Thread Starter
Squid
 
Join Date: Jul 2017
Posts: 9
Posting Frequency
 
I've pulled the forks off and had a look but not got a compression tool to get the springs out but they seem to go up and down fine now however I took it for MOT again and the chap said they still are too stiff, as far as I can see theyre ok but they are fully backed off on all the adjusters. When I pulled the forks out I tipped the fork oil out and out came about 350ml without taking the springs out. I could almost bottom them out when jumping on them (90kg bloke) so topped them up with a bit more fork oil which made it more difficult to bottom out. still the issue now is "they are still too stiff" bit annoying as I don't think theyre that bad? at a loss apart from taking them to another mot centre to see what they think.
paul4wolves is offline  
post #9 of 16 Old 07-27-2017, 04:21 AM Thread Starter
Squid
 
Join Date: Jul 2017
Posts: 9
Posting Frequency
 
Also the metal on metal sound I thought I was hearing sounds to be the fork oil moving in the bottom of the fork leg when I jump on the forks and when they come back up.. so I think that might be normal, theres a few lines on the chrome where the fork goes into the leg but I don't think that would make it that stiff to fail an mot? who knows
paul4wolves is offline  
post #10 of 16 Old 07-27-2017, 04:46 AM Thread Starter
Squid
 
Join Date: Jul 2017
Posts: 9
Posting Frequency
 
might just put some thinner fork oil in?
paul4wolves is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Kawasaki ZX-10R.net forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may 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
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome