Kfx 400 won't fire - Kawasaki ATV Forum
Kawasaki KFX450/KFX400 Dedicated to those mid-size, high-tech racers!

Reply
 
LinkBack Thread Tools Display Modes
post #1 of 33 Old 12-22-2013, 06:00 AM Thread Starter
Member
Feedback Score: 0 reviews
 
Join Date: Aug 2013
Location: western mass
Posts: 80
Kfx 400 won't fire

Well my rebuild of the kfx was going great until I went to fire her up. Turns over sounds great but won't fire up. Iv checked and I have spark. I cleaned the Petcock and I am getting fuel to the carb at least.

Now I'm waiting on getting a compression tester. And I'm hoping it reads good.

So far iv replaced my cdi, voltage regulator, starter solenoid, and wiring harness.

Iv never delved into the realm of doing an engine rebuild if needed I'm going to attempt the rebuild my self. I do have the hynes manual and a digital cop of I believe the clymers.

How hard is this job for someone with no experience in engine rebuilds. And do I need any special tools to complete the job. What else should I replace while it's apart.
Sawicki4x4 is offline  
Sponsored Links
Advertisement
 
post #2 of 33 Old 12-22-2013, 06:26 AM
Senior Member
Feedback Score: 0 reviews
 
dgthomas67's Avatar
 
Join Date: Sep 2011
Location: Sulphur, La
Posts: 338
You you have no or too low compression I would guess you need to change the rings and gaskets and clean the valves and change the valve seals. Did you check your valve settings?

David Thomas
2005 KFX 700 Vforce
2005 KFX 400
2006 KFX 700 Vforce

dgthomas67 is offline  
post #3 of 33 Old 12-22-2013, 06:33 AM
Banned
Feedback Score: 75 reviews
 
Join Date: Nov 2007
Location: Ky
Posts: 11,110
Valves in spec?
DoubleTapXX is offline  
Sponsored Links
Advertisement
 
post #4 of 33 Old 12-22-2013, 06:33 AM Thread Starter
Member
Feedback Score: 0 reviews
 
Join Date: Aug 2013
Location: western mass
Posts: 80
Quote:
Originally Posted by dgthomas67 View Post
You you have no or too low compression I would guess you need to change the rings and gaskets and clean the valves and change the valve seals. Did you check your valve settings?

I havnt gotten a chance to check much since not being able to fire it up. I might have some time today. I'm borrowing a compression tester and will get the readings and report back.

Any idea on how much the rebuild is going to cost me. I'm not real confident to do it myself. If I get a crazy high price I'm going to be forced to do it myself though.
Sawicki4x4 is offline  
post #5 of 33 Old 12-22-2013, 06:35 AM Thread Starter
Member
Feedback Score: 0 reviews
 
Join Date: Aug 2013
Location: western mass
Posts: 80
I'm going to have to figure out how to check valve spec. What do I need to do the job. I'm assuming a feeler gauges correct.
Sawicki4x4 is offline  
post #6 of 33 Old 12-22-2013, 06:56 AM
Senior Member
Feedback Score: 0 reviews
 
dgthomas67's Avatar
 
Join Date: Sep 2011
Location: Sulphur, La
Posts: 338
Yes Feeler gauges. Look in the service manual I sent you. It will tell you what you need.

David Thomas
2005 KFX 700 Vforce
2005 KFX 400
2006 KFX 700 Vforce

dgthomas67 is offline  
post #7 of 33 Old 12-22-2013, 07:00 AM Thread Starter
Member
Feedback Score: 0 reviews
 
Join Date: Aug 2013
Location: western mass
Posts: 80
Quote:
Originally Posted by dgthomas67 View Post
Yes Feeler gauges. Look in the service manual I sent you. It will tell you what you need.

Okay I will do that when I get home. Ill grab a feeler gauge while I'm here. If I'm correct the tolerance is like .0039-.0071
Sawicki4x4 is offline  
post #8 of 33 Old 12-22-2013, 07:14 AM
Senior Member
Feedback Score: 0 reviews
 
dgthomas67's Avatar
 
Join Date: Sep 2011
Location: Sulphur, La
Posts: 338
Here is a list of stuff and Part Numbers you would need to rebuild the top. Also you need to check the water pump and oil pump while you are doing this just to be safe.

13008-s008 - Ring Set - $31.86
11004-s006 - Head Gasket - $19.82
11061-s069 - Gasket Head Cover - $16.68
92049-s006 - Valve Seals - (Need 4) $3.13ea - $12.52
11061-s076 - Exhaust Pipe Gasket $8.37

Total without shipping - $89.25

This is to do it yourself. I had mine done at a shop and I forgot how much I paid. I am having it done right now to my 05 KFX 700 which has 2 cylinders and it is costing me $905.00 with parts and Tax. They are changing the rings and Valve seals and cleaning valves and changing gaskets. If should be cheaper for you. I was thinking it cost me around $325 to 375 labor. Buy your own parts. OEM Parts. That is what I do.

Cheapest Part are at Partzilla.com - OEM Powersports Parts from Honda, Kawasaki Polaris, Suzuki and Yamaha at discounts up to 80% off MSRP

David Thomas
2005 KFX 700 Vforce
2005 KFX 400
2006 KFX 700 Vforce


Last edited by dgthomas67; 12-22-2013 at 07:19 AM.
dgthomas67 is offline  
post #9 of 33 Old 12-22-2013, 07:15 AM
Senior Member
Feedback Score: 0 reviews
 
Join Date: Dec 2010
Location: So Cal
Posts: 445
This link will give you a good idea of what's needed to check valve lash.
Checking Valve Lash/changing Shims - Suzuki Z400 Forum : Z400 Forums
By "rebuild" are you talking just the top end?
You can get big bore kits with cylinder, piston and rings for right around $300 if you look around some and it's not that hard to do.
spize909 is offline  
post #10 of 33 Old 12-22-2013, 07:22 AM Thread Starter
Member
Feedback Score: 0 reviews
 
Join Date: Aug 2013
Location: western mass
Posts: 80
Thanks everyone for their help. It already has a big bore kit on it. So I'm assuming I would have to wait until it's disassembled to order the ring and such so I can measure the the piston. Tonight I will try to measure the valve clearance. And run a compression test. Is it possible it wot fire because the valves are out of spec or is a top end rebuild most defiantly in need. I'm sure I'll know more tonight. Am I correct that if I put a table spoon of oil in and the psi on the test goes up that's a tell take sign the motor needs a top end.
Sawicki4x4 is offline  
Reply

  Lower Navigation
Go Back   Kawasaki ATV Forum > Kawasaki ATV Performance / Maintenance / Technical > Kawasaki KFX450/KFX400

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Kawasaki ATV Forum 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.




Search tags for this page

03 kfx 400 top end rebuild won't start up

,

04 kawasaki kfx 400 not starting after motor rebuild

,

kfx 400 low compression

,

kfx 400 won't start pullstart

,

kfx 400 wont fire

,

kfx400 valves are out of spec wont start

,

ltz 400 won't fire

,

ltz 400 wont start valves

,

suzuki z400 wont start with switch but will pull start

,

what is the valve specification on a kfx 400

,

youtube 400 lt z wont fire

Click on a term to search our sites for related topics.

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
400 ex fire GeneralV Everything Else 11 12-13-2009 08:26 AM
Fire wapiti1 Club Kawie 5 01-07-2009 05:04 PM
FIRE! FIRE! FIRE!....GAS TANK!....GAS TANK! Griffee Kawasaki Brute Force/Prairie/Bayou 13 05-14-2007 08:53 AM
Big Fire Creek Runner Kawasaki Brute Force/Prairie/Bayou 6 06-03-2004 06:31 PM

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