Kfx still bogging... - Kawasaki KFX450 Forum :: KFX450HQ.com
Engine/EFI/Drivetrain Discuss engine, fuel injection, air intake, and drivetrain modifications here.

Reply
 
LinkBack Thread Tools Display Modes
post #1 of 12 (permalink) Old 04-07-2019, 08:23 PM Thread Starter
Member
 
Escobedo89's Avatar
 
Join Date: Jun 2013
Location: Arizona
Posts: 37
View Escobedo89's Photo Gallery(0)
Kfx still bogging...

Alright guys i posted before in 2017, im having the same prob just getting around to it again. MY 08 KFX keeps bogging down after riding for 10-20 min. Charged the batt, changed the ignition coil. Which i thought it was. The fan wont turn on before it bogs down. It turns on when i unplugg the temp sensor plug, but then it wont start and smells lole flooding. Any thoughts please?
Escobedo89 is offline  
Sponsored Links
Advertisement
 
post #2 of 12 (permalink) Old 04-07-2019, 10:05 PM Thread Starter
Member
 
Escobedo89's Avatar
 
Join Date: Jun 2013
Location: Arizona
Posts: 37
View Escobedo89's Photo Gallery(0)
Ok, so i rode it around till it started bogging, came home, took off the water temp sensor plug, it started while hot, but doesn't start with it cold unplugged. It ran awesome, i took it out again and it didnt bog out, f.i like was on the whole time though, and it backfired once in a while but other than that i think its the water temp sensor, unless anyone else has a clue before i buy another one?

P.s I live right by the desert so i just ride from my house to the trails, so from bogging and unplugging the wts to back to riding was like 2 min
Escobedo89 is offline  
post #3 of 12 (permalink) Old 04-07-2019, 10:20 PM
Senior Member
 
blue99stroker's Avatar
 
Join Date: Jan 2014
Location: Northern California
Posts: 1,824
View blue99stroker's Photo Gallery(0)
There is a way to test it! But i can’t remember the exact procure.

It honestly sounds like a water temp sensor

08 KFX450r- DASA, FCI, Stage 2 Hotcams, Wiseco Programmer, Procom, Dynatek Coil, 6K HID, 7" LED Light Bar.

Race Tech dual rate front springs, GT thunder XC Link and Race tech spring

Poly Case Saver, Streamline Stabilizer, Full PRM Skidplates, Pro Armor Bumpers, Tusk Heel Guards, TRX Rear Hubs, IMS 3.7 tank
blue99stroker is offline  
Sponsored Links
Advertisement
 
post #4 of 12 (permalink) Old 04-07-2019, 10:28 PM Thread Starter
Member
 
Escobedo89's Avatar
 
Join Date: Jun 2013
Location: Arizona
Posts: 37
View Escobedo89's Photo Gallery(0)
Does the water temp sensor control the water pump? Or just the fan?
Escobedo89 is offline  
post #5 of 12 (permalink) Old 04-07-2019, 10:41 PM Thread Starter
Member
 
Escobedo89's Avatar
 
Join Date: Jun 2013
Location: Arizona
Posts: 37
View Escobedo89's Photo Gallery(0)
Also, if i ride it with the water temp sensor unplugged until i get a new one, will that hurt anything?
Escobedo89 is offline  
post #6 of 12 (permalink) Old 04-07-2019, 11:04 PM
Senior Member
 
blue99stroker's Avatar
 
Join Date: Jan 2014
Location: Northern California
Posts: 1,824
View blue99stroker's Photo Gallery(0)
The water temp sensor is part of fan control and fueling.

The fan will in the whole time. I can’t remember if it changes the fuel mixture

08 KFX450r- DASA, FCI, Stage 2 Hotcams, Wiseco Programmer, Procom, Dynatek Coil, 6K HID, 7" LED Light Bar.

Race Tech dual rate front springs, GT thunder XC Link and Race tech spring

Poly Case Saver, Streamline Stabilizer, Full PRM Skidplates, Pro Armor Bumpers, Tusk Heel Guards, TRX Rear Hubs, IMS 3.7 tank
blue99stroker is offline  
post #7 of 12 (permalink) Old 04-08-2019, 03:19 PM Thread Starter
Member
 
Escobedo89's Avatar
 
Join Date: Jun 2013
Location: Arizona
Posts: 37
View Escobedo89's Photo Gallery(0)
Is that a yes or no, on riding with it unplugged haha.
Escobedo89 is offline  
post #8 of 12 (permalink) Old 04-09-2019, 03:55 PM
Super Moderator
Premium Member
 
Dust Devil's Avatar
 
Join Date: Oct 2009
Location: Lake Havasu city, Arizona
Posts: 9,434
View Dust Devil's Photo Gallery(0)
Quote:
Originally Posted by Escobedo89 View Post
Is that a yes or no, on riding with it unplugged haha.
Is your KFX all stock or has mods...???? fuel controller,upgraded intake, full exhaust...ect...?

Unplugging your water temp sensor should cause your F.I dash light & fan to come ON...

The water temp sensor needs to be plugged in or the DFI goes into limp mode & locks your advance timing....

To test the water temp sensor...see picture below...

lean fuel mixture or Low fuel pressure...can cause your symptoms...!
Attached Thumbnails
Click image for larger version

Name:	Water temp resistance.JPG
Views:	17
Size:	153.9 KB
ID:	24338  

Check with Site Sponsors "First"

(Immortal ATV)
Todd
http://immortalatv.com
1-(800)380-9646
[email protected]
Save 5% off $100 or more, use coupon code: KFX450HQ

(KB Motor-sports)
Website:
http://www.kbmotorsportsonline.com

(Discount Tire)
At The Store: www.discounttire.com
To Your Door: www.discounttiredirect.com
Sales and Technical: 1.888.459.4080




Dust Devil is offline  
post #9 of 12 (permalink) Old 04-12-2019, 08:09 AM Thread Starter
Member
 
Escobedo89's Avatar
 
Join Date: Jun 2013
Location: Arizona
Posts: 37
View Escobedo89's Photo Gallery(0)
All its got is a jardine rt99 exhaust and a notoil with airbox lid off. I rode around the other day with the water temp sensor unplugged. It did last longer before it bogged out, but itbl still did the same thing.
Escobedo89 is offline  
post #10 of 12 (permalink) Old 04-12-2019, 06:32 PM
Super Moderator
Premium Member
 
Dust Devil's Avatar
 
Join Date: Oct 2009
Location: Lake Havasu city, Arizona
Posts: 9,434
View Dust Devil's Photo Gallery(0)
Quote:
Originally Posted by Escobedo89 View Post
All its got is a jardine rt99 exhaust and a notoil with airbox lid off. I rode around the other day with the water temp sensor unplugged. It did last longer before it bogged out, but itbl still did the same thing.
Keep the water temp sensor PLUGGED IN...!!!

Check your fuel pressure 43 psi (idle to full throttle)...tester... https://www.ebay.com/itm/Fuel-Inject...cAAOSwfl1chyt6

Also check your valve lash/clearance....

Valve Clearance: between cam and valve lifter
Standard:
Exhaust 0.17 ∼ 0.22 mm (0.0067 ∼ 0.0087 in.)
Inlet 0.10 ∼ 0.15 mm (0.0039 ∼ 0.0059 in.)

If the valve clearance is not within the specified range,
adjust it.

Check with Site Sponsors "First"

(Immortal ATV)
Todd
http://immortalatv.com
1-(800)380-9646
[email protected]
Save 5% off $100 or more, use coupon code: KFX450HQ

(KB Motor-sports)
Website:
http://www.kbmotorsportsonline.com

(Discount Tire)
At The Store: www.discounttire.com
To Your Door: www.discounttiredirect.com
Sales and Technical: 1.888.459.4080





Last edited by Dust Devil; 04-12-2019 at 06:35 PM.
Dust Devil is offline  
Reply

  Lower Navigation
Go Back   Kawasaki KFX450 Forum :: KFX450HQ.com > KFX450 Performance > Engine/EFI/Drivetrain

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Kawasaki KFX450 Forum :: KFX450HQ.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











Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 



Similar Threads
Thread Thread Starter Forum Replies Last Post
I have a problem with my kfx Borja86 General Discussion 2 12-12-2018 08:22 PM
Hey everyone- new KFX guy here Doc Holladay Member Introductions 1 11-03-2018 10:30 AM
The girlfriend bought a kfx 450! Brent_xx Member Introductions 23 04-08-2017 09:06 PM
What will compete with my 08 kfx 450r Ryan698 General Discussion 22 10-21-2016 12:38 PM
Problem start with kfx 450r Perezguelo Member Introductions 4 06-20-2016 10:32 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