Oil on spark plug - Kawasaki KFX450 Forum :: KFX450HQ.com
Engine/EFI/Drivetrain Discuss engine, fuel injection, air intake, and drivetrain modifications here.

LinkBack Thread Tools Display Modes
post #1 of 2 (permalink) Old 03-09-2019, 11:46 PM Thread Starter
Junior Member
Join Date: Mar 2019
Posts: 1
View JSalazar450r's Photo Gallery(0)
Oil on spark plug

Hey everyone! New to the site as I recently bought my first kfx. Decided to check the valves the other day but when I took the spark plug out it had oil almost all the way up the threads! Ive never seen that before so I Googled it and read that this is usually caused by bad valves cover gasket. Would a new gasket most likely solve this issue or maybe something else? Thanks in advance!
JSalazar450r is offline  
Sponsored Links
post #2 of 2 (permalink) Old 03-10-2019, 06:01 PM
Super Moderator
Premium Member
Dust Devil's Avatar
Join Date: Oct 2009
Location: Lake Havasu city, Arizona
Posts: 9,524
View Dust Devil's Photo Gallery(0)
Welcome to the Forum....!!!!

It could be carbon/unburnt fuel due to the rich (factory setting) air/fuel mixture....& not oil....(can you post a picture of the spark plug in question)...??

If it's oil...
Bad valve seals, bad piston rings or your last oil change you added too much oil causing it to overflow & sucked up in the crankcase vent hose into the intake tube....see below capacity

Bad valve seals...burning oil (blueish-white exhaust smoke) when first time starting after it's sits over night....!!

Bad rings...burning oil when the motor is running...low compression symptoms are noticed...!!

Capacity 1.15 L (1.22 US qt.) (when filter is not
1.20 L (1.27 US qt.) (when filter is removed)
1.35 L (1.43 US qt.) (when engine is
completely dry)

Check with Site Sponsors "First"

(Immortal ATV)
[email protected]
Save 5% off $100 or more, use coupon code: KFX450HQ

(KB Motor-sports)

(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  

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

Quick Reply

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


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

Email Address:


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

Similar Threads
Thread Thread Starter Forum Replies Last Post
Five Best Motor Oil Options for ATVs and UTVs VS_Goose KFX450HQ.com News 3 06-25-2017 08:59 PM
Help With ACCEL Coil and Spark Plug Boot tigersfan457000 Engine/EFI/Drivetrain 15 04-21-2017 12:23 AM
spark plug question with mods coops11kfx440 Engine/EFI/Drivetrain 4 11-20-2016 06:52 PM
Spark plug problem KawiPawPaw Engine/EFI/Drivetrain 23 10-26-2016 12:19 AM
Spark plug cap 1jrboggs General Discussion 4 10-06-2016 12:32 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