Anti-ThermoQuad? - 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.

 5Likes
Reply
 
LinkBack Thread Tools Display Modes
post #1 of 31 Old 04-29-2019, 12:28 PM Thread Starter
2nd Gear
 
Join Date: Jun 2017
Posts: 320
Anti-ThermoQuad?

As I was perusing the service manual the other day (yes, I actually read service manuals just for fun) I noticed that the Australia variant appears to have a liquid heated or cooled carburetor. At least that is what the cooling system diagram seems to show. And I went and looked at my KLR and, sure enough, the water pump housing casting has the boss where the Australian model has the port for the hose to the carburetor. What I didn’t see was what the carburetor looks like to see where the water goes on the other end.

Tom, Paul, anyone familiar with this variant? Do you know if the intent was to more quickly heat a cold carburetor or to cool a hot carb to prevent vapor lock?

Just a curiosity...
Crystal Reed likes this.
Voyager is offline  
Sponsored Links
Advertisement
 
post #2 of 31 Old 04-29-2019, 01:34 PM
Pretty in Pink, dunno why
 
Tom Schmitz's Avatar
 
Join Date: Feb 2009
Location: Redondo Beach
Posts: 7,565
Garage
I have a Vulcan pumper carb that, IIRC, had a heater circuit on it. I disassembled it but still have the parts.

It may have been the Australian fuels were at one time contributing to icing and KHI installed a heater. That’s what happened with the Vulcans.

At least, that was the Vulcan story with the 1500s.
pdwestman likes this.

Tom [email protected]

“She went out slowly. The way she did it hadn’t been learned at business college.” -Philip Marlowe

“'Why' and 'How' are words so important they cannot be too often used.” -Napoleon Bonaparte


Sting like a butterfly.
Tom Schmitz is offline  
post #3 of 31 Old 04-29-2019, 01:42 PM
4th Gear
 
Join Date: Aug 2010
Location: Kelowna, B.C.
Posts: 2,341
Carb pre-heat (seen pics of the setup from Aussie members), I believe.......also not needed IMO; it gets cold in Canada too from time to time! ;-)

Dave
DPelletier is offline  
 
post #4 of 31 Old 04-29-2019, 06:05 PM
OverDrive
 
Join Date: Nov 2009
Location: Lander, Wyoming
Posts: 5,528
Quote:
Originally Posted by DPelletier View Post
Carb pre-heat (seen pics of the setup from Aussie members), I believe.......also not needed IMO; it gets cold in Canada too from time to time! ;-)

Dave
Its not "pre-heat' Dave. It would have to be an Electric heater to do that.

The European 'C' model KLR's received the anti-icing carb heaters. High humidity & cool temps can cause carb icing and those people ride in ALL Weather.

Numerous road bikes, atv's & utv's use carb anti-icing systems. Both electric & coolant variants.


If Watt-man could have purchased the anti-ice thermostat housings in the USA, he would have!
But he would have still needed to find a supplier for the 195F thermostats!

pdwestman
Modify at "YOUR OWN RISK"!

Still riding my 1987 KL650-A1. 85,000+ miles & counting
pdwestman is offline  
post #5 of 31 Old 04-29-2019, 06:11 PM Thread Starter
2nd Gear
 
Join Date: Jun 2017
Posts: 320
Quote:
Originally Posted by pdwestman View Post
Its not "pre-heat' Dave. It would have to be an Electric heater to do that.

The European 'C' model KLR's received the anti-icing carb heaters. High humidity & cool temps can cause carb icing and those people ride in ALL Weather.

Numerous road bikes, atv's & utv's use carb anti-icing systems. Both electric & coolant variants.


If Watt-man could have purchased the anti-ice thermostat housings in the USA, he would have!
But he would have still needed to find a supplier for the 195F thermostats!
Did this require a different carb with built in water passages? Or was it a shroud that went around the carb somehow?
Voyager is offline  
post #6 of 31 Old 04-29-2019, 06:41 PM
OverDrive
 
Join Date: Nov 2009
Location: Lander, Wyoming
Posts: 5,528
Find #92005-1350 fitting in this schematic. https://www.kawasakipartshouse.com/o...08d/carburetor

The plastic fitting is divided, up & in on one side and down & out on the other. Only takes a trickle of coolant to do the job.

Just to the Left of the pilot mixture screw Tower is a pocket in the carb body. May be visible with a mirror? A (added) tower on the float bowl is also drilled & tapped for the retainer bracket.

pdwestman
Modify at "YOUR OWN RISK"!

Still riding my 1987 KL650-A1. 85,000+ miles & counting
pdwestman is offline  
post #7 of 31 Old 04-29-2019, 07:46 PM
Pretty in Pink, dunno why
 
Tom Schmitz's Avatar
 
Join Date: Feb 2009
Location: Redondo Beach
Posts: 7,565
Garage
Quote:
Originally Posted by pdwestman View Post
...If Watt-man could have purchased the anti-ice thermostat housings in the USA, he would have!
But he would have still needed to find a supplier for the 195F thermostats!
Bill believes he needs a 3/8" bypass hose. That boss won't support anything that big unless (maybe) one were to bore it and press a pipe into it.

It would be slick, though.

Tom [email protected]

“She went out slowly. The way she did it hadn’t been learned at business college.” -Philip Marlowe

“'Why' and 'How' are words so important they cannot be too often used.” -Napoleon Bonaparte


Sting like a butterfly.
Tom Schmitz is offline  
post #8 of 31 Old 04-29-2019, 08:23 PM Thread Starter
2nd Gear
 
Join Date: Jun 2017
Posts: 320
Quote:
Originally Posted by Tom Schmitz View Post
Bill believes he needs a 3/8" bypass hose. That boss won't support anything that big unless (maybe) one were to bore it and press a pipe into it.

It would be slick, though.
That was my thought when I saw that AU variant in the service manual. Seems like it would be a nice addition for the northern climes in north america. I suspect it would provide crisp throttle response a little sooner than otherwise.
Voyager is offline  
post #9 of 31 Old 04-29-2019, 09:02 PM
1st Gear
 
Join Date: Aug 2018
Location: Northeast PA
Posts: 45
Quote:
Originally Posted by Tom Schmitz View Post
It may have been the Australian fuels were at one time contributing to icing and KHI installed a heater.
From my pilot training: There is a temperature drop in the carb when the fuel vaporizes. At certain humidity and temperature combinations this can lead to carb ice forming. This leads to a constricted intake and reduced power. The fix in airplanes is carb heat. Hot air from a shroud covering the exhaust (think old VW heater except that it works) is directed into the carb to melt the ice. Carb heat is pilot controlled and only used as necessary. Leaving it on full time also reduces available power because the charge density is reduced at elevated temperatures, i.e., cool air gives more power.

Fly safe,

jncdi
jncdi is offline  
post #10 of 31 Old 04-30-2019, 05:49 AM Thread Starter
2nd Gear
 
Join Date: Jun 2017
Posts: 320
Quote:
Originally Posted by jncdi View Post
From my pilot training: There is a temperature drop in the carb when the fuel vaporizes. At certain humidity and temperature combinations this can lead to carb ice forming. This leads to a constricted intake and reduced power. The fix in airplanes is carb heat. Hot air from a shroud covering the exhaust (think old VW heater except that it works) is directed into the carb to melt the ice. Carb heat is pilot controlled and only used as necessary. Leaving it on full time also reduces available power because the charge density is reduced at elevated temperatures, i.e., cool air gives more power.

Fly safe,

jncdi
Yes, I am quite familiar with carb icing (owned a VW Beetle that had the carb heat shroud hose removed and been a pilot since 1978). The curiousity for me was why was this only offered in Australia?
DPelletier likes this.
Voyager 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
Anti Vibration Bar Risers spckrc86 1987 to 2007 Wrenching & Mods 2 03-30-2012 10:26 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