Fuel valve - Kawasaki KLR 650 Forum
1987 to 2007 Wrenching & Mods For maintaining, repair or modifications of Generation 1 KLR's. 2007 and earlier.

  • 1 Post By pdwestman
LinkBack Thread Tools Display Modes
post #1 of 5 Old 03-19-2019, 07:36 PM Thread Starter
Join Date: Mar 2019
Posts: 2
Fuel valve

Engine is starving for fuel above ideal. I think the fuel valve vacuum diaphragm is not working. Can I put a manual valve on the tank a plug off the vacuum line at the carburetor?
wwm vegas is offline  
Sponsored Links
post #2 of 5 Old 03-19-2019, 07:56 PM
Join Date: Nov 2009
Location: Lander, Wyoming
Posts: 6,221
You are better off keeping the automatic OFF vacuum controlled fuel valve, IMHO!

Fuel valve diaphragm #43028-1033, maybe about $20.

Or just take the spring out of the diaphragm cap or the o-ring off of the plunger on the diaphragm, either of these converts it to a manual valve.
For testing purposes at least or forever, your choice.
wwm vegas likes this.

Modify at "YOUR OWN RISK"!

Still riding my 1987 KL650-A1. 85,000+ miles & counting
pdwestman is offline  
post #3 of 5 Old 03-19-2019, 11:06 PM Thread Starter
Join Date: Mar 2019
Posts: 2
Thanks, I will give it a try.
wwm vegas is offline  
post #4 of 5 Old 03-20-2019, 08:20 AM
5th Gear
Join Date: Jan 2011
Posts: 4,593
Or . . . a more-or-less operational test:

Secure clean container.

Start engine.

Disconnect fuel line to carburetor; have container handy to catch fuel (if any flow).

Observe fuel flow (if any) from fuel line with engine running.

Kill engine, re-connect fuel line to carburetor.

CAVEAT: Never performed nor observed this procedure; just thinking: a healthy fuel low would indicate an operrational vacuum petcock; otherwise, execute Plan B!

“You better put down that gun. You got two ways to go, put it down or use it. Even if you tie me, you’re gonna be dead.” "John Russell" (Paul Newman), Hombre
Damocles is online now  
post #5 of 5 Old 03-20-2019, 10:05 AM
5th Gear
Join Date: Aug 2010
Location: Kelowna, B.C.
Posts: 2,642
Yes you can replace with a manual petcock; many of us have done it. Yamaha 660 Raptor Petcock
5LP-24500-01.01 also available from Eaglemike. You need to make sure that you turn the manual unit on and off for use so as to ensure you don't flood the engine with fuel in the event of a carb problem.

DPelletier is offline  
Sponsored Links

Quick Reply

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:
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:


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
Zero valve clearance on right exhaust valve -- anyone got a shim kit in Ontario? drumstyx 1987 to 2007 Wrenching & Mods 8 07-22-2016 02:20 PM
Fuel Valve Diaphram Trouble me262 1987 to 2007 Wrenching & Mods 10 11-05-2014 08:06 PM
Need Valve Shims?/Got Valve Shims? MapMaster KLR & Other Motorcycle Related Discussion 37 02-18-2013 11:40 PM
put on new fuel tank no fuel out pet cock ?? julies klr650 How To's & Tech Guides 8 04-16-2012 11:23 PM
Fuel shutoff valve w/n pass fuel Stephen.s1 1987 to 2007 Wrenching & Mods 4 07-12-2008 08:16 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