Old ZX12r wont start, advice for debugging - Kawasaki Forum :: KawasakiWorld.com
 
LinkBack Thread Tools Display Modes
post #1 of 10 Old 03-23-2019, 03:59 PM Thread Starter
Senior Member
 
stube40's Avatar
 
Join Date: May 2007
Location: Perth, Australia
Posts: 174
Old ZX12r wont start, advice for debugging

My 2000 12r has ALOT of miles on it, but really hasn't missed a beat ever - amazingly robust bike! Until now though.....

I'm suspecting the starter motor has gone. Here is what I can tell you:

First sign of trouble was just after a 30min drive. I turned bike off then decided to start it up again straight away but I noticed it really struggled to start. Like starter motor was struggling to turn engine. Bike was fine for a few more days of regular daily commute after that, but then failed to start one morning with following symptoms. Bike turns on as normal. Everything seems to happen as usual - the rev counter and speed needles do their test. I can hear the whine of (I presume) the fuel pump etc. Appears normal. When I press start button the engine does not turn over, but I do hear the same fuel-pump sound (or whatever that high-pitched whine is) as long as I have my finger on start button. Battery is not old, although not brand new either. I have taken it out, charged it, measured voltage with multi-meter (12.5V) and all seems good. Although I have not done a full battery test so can't guarantee it is that

Any tips?

2001 Red ZX12R, 45000kms, PCIII USB, Remus Titanium Exhaust, Pilot Jet Mod, Various CF Parts, Bridgestone 020s
stube40 is offline  
Sponsored Links
Advertisement
 
post #2 of 10 Old 03-23-2019, 04:22 PM
Senior Member
 
Barbarian-CBX's Avatar
 
Join Date: Jan 2002
Location: Matthews, NC (Charlotte)
Posts: 19,193
Send a message via Skype™ to Barbarian-CBX
Still might be the battery. I'd buy a battery tester first. Put on 4 way flashers and push starter button. See if they dim. Push horn button and push starter button. Did horn die?

12R's are notorious for doing crazy things when a battery is going bad.

Sent from my SM-G955U using Tapatalk

Not just a great barbarian, the greatest barbarian, bar none!
http://www.barbarian-cbx.com/3f364190.jpg
Barbarian-CBX is offline  
post #3 of 10 Old 03-23-2019, 11:59 PM Thread Starter
Senior Member
 
stube40's Avatar
 
Join Date: May 2007
Location: Perth, Australia
Posts: 174
Thanks - great advice. Tried both tips. THe 4 way flashers didn't dim and the horn note dropped a TINY bit when I hit the start button, but otherwise continued as normal. Based on this, battery seems good I think?

So quite possibly looking like starter motor replacement?

2001 Red ZX12R, 45000kms, PCIII USB, Remus Titanium Exhaust, Pilot Jet Mod, Various CF Parts, Bridgestone 020s
stube40 is offline  
Sponsored Links
Advertisement
 
post #4 of 10 Old 03-24-2019, 01:09 AM
Senior Member
 
ninjayorkie's Avatar
 
Join Date: Dec 2004
Location: Altofts zx-12r B4
Posts: 1,349
Garage
When It happens again, put the bike in gear and rock the bike, pull the clutch lever in and then try.

Like you say it could be that the starter motor just needs removing, stripping apart and cleaning, they're not hard to do.

For Tech Questions Bike Model letters and Country are more useful than saying the year, for UK owners anyway, as registration year is not always the year of manufacturer model.
ninjayorkie is offline  
post #5 of 10 Old 03-25-2019, 03:49 PM Thread Starter
Senior Member
 
stube40's Avatar
 
Join Date: May 2007
Location: Perth, Australia
Posts: 174
I tried rocking it back and forth in gear - did it 3 times and nothing changed. However, on the 4th time I was sure that it sounded slightly different when I tried to start, almost like the starter motor was trying to get going (it was really subtle and quiet). 5th time it was just the same as the first 3 times - nothing other than the usual high pitch whine.

So looking alot like the starter motor? I'm quite happy to give it a go to try and remove it and strip it apart. Done lots of things on the 12r before, but never once looked at the starter motor - I don't even know where it is on the engine. Do I need any specialist tools?

2001 Red ZX12R, 45000kms, PCIII USB, Remus Titanium Exhaust, Pilot Jet Mod, Various CF Parts, Bridgestone 020s
stube40 is offline  
post #6 of 10 Old 03-25-2019, 04:02 PM
Senior Member
 
KZScott's Avatar
 
Join Date: Jan 2007
Location: Ontario, Canada
Posts: 6,189
Send a message via MSN to KZScott
is the neutral light on?
is your clutch switch working?
kickstand switch?

01 ZX-12R 8.84 @ 156.3 on dot tires, NA.... turbo 8.47 @ 164
00 ZX-12R 8.62 @ 165.2 no bars, slicks, 55 shot... turbo 8.32 @ 173
00 ZX-12R 1: 222.046 1.5: 226.390 Worlds Fastest NA Kawasaki
00 ZX-12R street turbo 1: 227.9 1.5: 234.1
00 ZX-12R LSR turbo 1: 263.1 1.5: 266.5 Worlds fastest ZX-12R CMG Racing RCC Turbos
KZScott is online now  
post #7 of 10 Old 03-26-2019, 12:51 AM
Senior Member
 
ninjayorkie's Avatar
 
Join Date: Dec 2004
Location: Altofts zx-12r B4
Posts: 1,349
Garage
These pictures and youtube video are for a zx-9r but the differences are only noticeable if you try fitting a zx-9r one into you 12 as the drive shaft are different sizes so won't work.

I'll just add I've never removed one from a zx-12r so I don't know how much room there is at the back of the engine for ease of removal.

Anyway here are some pictures. Take your time when rebuilding it and don't force anything. It's the brushes your wanting to check and to clean the armature where the brushes rub. Plus clean out all the crap that will be all over the insides.





This is not me by the way.

For Tech Questions Bike Model letters and Country are more useful than saying the year, for UK owners anyway, as registration year is not always the year of manufacturer model.

Last edited by ninjayorkie; 03-26-2019 at 01:00 AM.
ninjayorkie is offline  
post #8 of 10 Old 03-26-2019, 01:51 AM
Senior Member
 
Duck00's Avatar
 
Join Date: Aug 2002
Location: South Australia
Posts: 1,800
I've removed mine a couple of times recently to clean up the bushings etc, made a bit of difference.

It can be taken out, just a bit fiddly, one of the coolant pipes (to back of cylinder block I think) is sitting in an awkward spot, but can be done. The manual makes it look like a simple procedure, just take your time.
Duck00 is offline  
post #9 of 10 Old 03-29-2019, 03:30 PM Thread Starter
Senior Member
 
stube40's Avatar
 
Join Date: May 2007
Location: Perth, Australia
Posts: 174
Quote:
Originally Posted by KZScott View Post
is the neutral light on?
is your clutch switch working?
kickstand switch?
Thanks KZScott,

Neutral light is on
When I put it in gear, neutral goes off. When I try to start it in gear the FL light flashes, but stops flashing if I pull in clutch. So I guess clutch switch seems OK?

2001 Red ZX12R, 45000kms, PCIII USB, Remus Titanium Exhaust, Pilot Jet Mod, Various CF Parts, Bridgestone 020s
stube40 is offline  
post #10 of 10 Old 03-29-2019, 03:39 PM
Senior Member
 
KZScott's Avatar
 
Join Date: Jan 2007
Location: Ontario, Canada
Posts: 6,189
Send a message via MSN to KZScott
sounds like those are ok, i would check the solenoid or the starter next

01 ZX-12R 8.84 @ 156.3 on dot tires, NA.... turbo 8.47 @ 164
00 ZX-12R 8.62 @ 165.2 no bars, slicks, 55 shot... turbo 8.32 @ 173
00 ZX-12R 1: 222.046 1.5: 226.390 Worlds Fastest NA Kawasaki
00 ZX-12R street turbo 1: 227.9 1.5: 234.1
00 ZX-12R LSR turbo 1: 263.1 1.5: 266.5 Worlds fastest ZX-12R CMG Racing RCC Turbos
KZScott is online now  
Reply

  Kawasaki Forum :: KawasakiWorld.com > Kawasaki Motorcycles > ZX-12R

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Kawasaki Forum :: KawasakiWorld.com 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










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
2002 zx12r cold start bryce34 ZX-12R 12 01-19-2019 05:20 AM
Zx12r buying advice! Joseph McCouch ZX-12R 3 08-10-2018 01:35 PM
2000 ZX12R hot start problem Richard McCracken ZX-12R 4 06-06-2018 04:42 AM
New 02 ZX12R owner needs louder slip on advice MattKoller ZX-12R 10 12-08-2017 10:57 PM
Proud owner zx12r needing help!! Robbie ZX-12R 20 10-19-2016 12:04 AM

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