How much carbon build up on values and piston is normal? - Kawasaki KLR 650 Forum
2008+ KLR650 Wrenching & Mod Questions For repair, maintaining or modifying discussions related to the newly updated 2008 and beyond, Generation 2 KLR650 Motorcycle.

 1Likes
  • 1 Post By pdwestman
 
LinkBack Thread Tools Display Modes
post #1 of 9 Old 10-12-2018, 02:27 PM Thread Starter
1st Gear
 
TechNeck's Avatar
 
Join Date: May 2018
Location: Edmonton AB
Posts: 53
How much carbon build up on values and piston is normal?

I have a 2008 with 48000km on it. I just took the engine apart and was shocked to find between 3/32 and 1/8 hard carbon deposits on the valves, head and piston. I should have taken some photos but I wasn't thinking before cleaning it up.

Everything moved freely, but is this normal on a klr650?

"Life is a series of small victories; connected by strings of catastrophe"
TechNeck is offline  
Sponsored Links
Advertisement
 
post #2 of 9 Old 10-12-2018, 07:07 PM
OverDrive
 
Join Date: Nov 2009
Location: Lander, Wyoming
Posts: 5,464
An oil burning KLR650 usually has fairly soft, crumbly carbon which continually flakes off & the outer perimeter of the piston dome is usually washed fairly clean.

Hard carbon may be from low quality gasoline or old gasoline which is not burning completely/properly.

There are a few members on here which do live in your area. Do you purchase fuel in bulk, 55 gallon drum or larger? Or one fuel tank full at a time? Which supplier?

pdwestman
Modify at "YOUR OWN RISK"!

Still riding my 1987 KL650-A1. 85,000+ miles & counting
pdwestman is offline  
post #3 of 9 Old 10-13-2018, 11:29 AM Thread Starter
1st Gear
 
TechNeck's Avatar
 
Join Date: May 2018
Location: Edmonton AB
Posts: 53
It was kinda in between crumbly and rock hard, the surface was easy to chip off but the stuff on the metal was hard as rock.

I use shell premium. Not sure what the previous owner used, I only have 4000km on it.

"Life is a series of small victories; connected by strings of catastrophe"
TechNeck is offline  
 
post #4 of 9 Old 10-15-2018, 02:00 PM
2nd Gear
 
clogan's Avatar
 
Join Date: Dec 2010
Location: Tennessee
Posts: 323
Does your 2008 burn oil like so many others? If so, that could be a contributing factor. Your carbon build up sounds very similar to what I found on mine as I installed Eagle Mike's 685 kit to solve oil burning on my 2009. Unfortunately, I have no pics either.

Sent from my XT1254 using Tapatalk

"Chet from Chattanooga"
2009 KLR, blue
clogan is online now  
post #5 of 9 Old 10-16-2018, 12:46 AM Thread Starter
1st Gear
 
TechNeck's Avatar
 
Join Date: May 2018
Location: Edmonton AB
Posts: 53
Yup, burns .75-1 litre every tank fill up. Hence why I'm rebuilding it, the piston rings fell off the head after removing them from the sleeve.

"Life is a series of small victories; connected by strings of catastrophe"
TechNeck is offline  
post #6 of 9 Old 10-16-2018, 07:27 PM
2nd Gear
 
clogan's Avatar
 
Join Date: Dec 2010
Location: Tennessee
Posts: 323
Found a pic of mine. This is 2009 OEM piston after 22,000 miles. Started burning oil at 3,000, and got progressively worse. The EM kit fixed it: no more oil burning with 7,000 miles after install.

Sent from my XT1254 using Tapatalk

"Chet from Chattanooga"
2009 KLR, blue
clogan is online now  
post #7 of 9 Old 10-16-2018, 07:28 PM
2nd Gear
 
clogan's Avatar
 
Join Date: Dec 2010
Location: Tennessee
Posts: 323
Plus, the install was a pretty fun project!

Sent from my XT1254 using Tapatalk

"Chet from Chattanooga"
2009 KLR, blue
clogan is online now  
post #8 of 9 Old 03-18-2019, 10:30 PM
1st Gear
 
chestypuller1970's Avatar
 
Join Date: Mar 2019
Location: Palmer, Alaska
Posts: 45
Garage
wonder if theres some sticking of the oil rings too with carbon, anyone ever run a strong dose of chemtool thru klrs? how about seafoaming the intake?


2009 KLR 650 Black and red, 12000 miles
chestypuller1970 is offline  
post #9 of 9 Old 03-19-2019, 12:36 PM
OverDrive
 
Join Date: Nov 2009
Location: Lander, Wyoming
Posts: 5,464
Quote:
Originally Posted by chestypuller1970 View Post
wonder if theres some sticking of the oil rings too with carbon, anyone ever run a strong dose of chemtool thru klrs? how about seafoaming the intake?
I don't think that anyone has ever found any of the three rings on a KLR piston stuck from carbon build-up.

I'll list several of the major reasons for KLR oil consumption in decending order, IMO.

Too much oil on the cylinder wall, especially at higher RPM's with stock oiling system.
Too few & too small of oil return holes in & below the oil ring on standard oem piston.
Potentially miss-machined #2 ring on the 2008-2009 models, It is the final oil scraper, not actually a compression ring!
Non-concentric or tapered cylinder wall.
Uneven / Inconsistent engine temps with standard cooling system.
Too cold of overall engine temperature, both coolant & oil.
Dust ingestion from improper air filter servicing or melted holes in the bottom of the air box or missing drain plug.

And yet the lowly KLR650 engine will still run 100,000+ miles if we will simply keep the oil level UP.

Broken ring lands due to hydro-locking a gasoline or water flooded cylinder or detonation cause way too much oil consumption to continue feeding them that much OIL. >1 qt per 200 miles.
samuel likes this.

pdwestman
Modify at "YOUR OWN RISK"!

Still riding my 1987 KL650-A1. 85,000+ miles & counting
pdwestman is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Kawasaki KLR 650 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










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
Bolt sizes and torque values PaddyD 2008+ KLR650 Wrenching & Mod Questions 0 06-10-2018 12:40 AM
Coolant temperature sensor resistance versus temperature values Normk 1987 to 2007 Wrenching & Mods 6 12-26-2013 03:02 AM
Front sprocket: how much is too much? beejjorgensen 1987 to 2007 Wrenching & Mods 18 07-07-2013 07:52 AM
A 2008 Build-Up Thread KLR Kaos 2008+ KLR650 Wrenching & Mod Questions 83 09-05-2012 08:58 PM
1994 klr 250 values, avidflyguy Other KLR's - 250, 600, Tengai, C Models, KLX... 4 06-28-2012 08:29 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