Second Gen Carburetor Flaw Revealed!!!! - Page 13 - 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.

 50Likes
 
LinkBack Thread Tools Display Modes
post #121 of 187 Old 09-06-2019, 07:29 PM Thread Starter
2nd Gear
 
Join Date: Jul 2019
Posts: 163
Quote:
Originally Posted by pdwestman View Post
Ok,
1/2 a jet & 1/2 a jet equals 1. But neither one works by itself does it?
thats how i see it too lol

holy crap, we agreed once, break out the beers !

Licensed Motorcycle Mechanic since 1995 !!
JdgDReDD is online now  
Sponsored Links
Advertisement
 
post #122 of 187 Old 09-06-2019, 08:23 PM
OverDrive
 
Join Date: Nov 2009
Location: Lander, Wyoming
Posts: 5,702
Quote:
Originally Posted by JdgDReDD View Post
thats how i see it too lol

holy crap, we agreed once, break out the beers !
I've got one in hand, cheers to you!

pdwestman
Modify at "YOUR OWN RISK"!

Still riding my 1987 KL650-A1. 85,000+ miles & counting
pdwestman is offline  
post #123 of 187 Old 09-06-2019, 08:28 PM Thread Starter
2nd Gear
 
Join Date: Jul 2019
Posts: 163
Haha. me too, it is friday after all , SKOL ! ! (Danish for cheers)

Quote:
Originally Posted by pdwestman View Post
I've got one in hand, cheers to you!

Licensed Motorcycle Mechanic since 1995 !!
JdgDReDD is online now  
 
post #124 of 187 Old 09-06-2019, 08:45 PM Thread Starter
2nd Gear
 
Join Date: Jul 2019
Posts: 163
Paul you should add the o ring like ya said.

be prepared to go up on pilot and down on needle either/or/both

Licensed Motorcycle Mechanic since 1995 !!
JdgDReDD is online now  
post #125 of 187 Old 09-24-2019, 08:59 AM
1st Gear
 
Join Date: Sep 2019
Posts: 16
Has anyone else done this mod, are your results the same? Anything that gets rid of the flat spots and maintains good gas mileage is a Big plus!
Retfird is offline  
post #126 of 187 Old 09-24-2019, 03:21 PM
5th Gear
 
Join Date: Jan 2011
Posts: 4,438
Retfrd, in the movie, "The Maltese Falcon," detective Sam Spade (Humphrey Bogart) is asked by a policeman what a fraudulent copy of a priceless statuette is (supposed to be) made of (presumed, gold; actual, lead).

Sam Spade replies, "The stuff that dreams are made of." Spade paraphrases dialog in Act 4 of William Shakespeare’s play, "The Tempest," wherein Prospero says, "We are such stuff / As dreams are made on."

In my view, the analysis and mod to correct the perceived, "second-gen-carburetor-flaw," remain: The stuff that dreams are made of.

The "flaw," fuel-lean mid-rpm running, was revealed long ago. Mods correcting the flaw, shimming the stock needle or replacing the needle with one of KLX-or-similar profile, have been around awhile.

Bench-grinder needle profiling? O-ring installation to shim (raise) the needle? In my view, postulated results from these approaches remain, "The stuff dreams are made of," YMMV!


“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 offline  
post #127 of 187 Old 09-24-2019, 05:02 PM
1st Gear
 
Join Date: Sep 2019
Posts: 16
Been there done those mods! KLX needle uses to much fuel as you already know!

If you have not done the O ring mod how can you be quoting Shakespeare as proof it does not help? If you lose your dreams you are surrendering to failure i refuse to do that, if you have maybe some seat time and wind therapy might be the cure.
Retfird is offline  
post #128 of 187 Old 09-24-2019, 07:33 PM
5th Gear
 
Join Date: Jan 2011
Posts: 4,438
Quote:
Originally Posted by Retfird View Post
Been there done those mods! KLX needle uses to much fuel as you already know!

If you have not done the O ring mod how can you be quoting Shakespeare as proof it does not help? If you lose your dreams you are surrendering to failure i refuse to do that, if you have maybe some seat time and wind therapy might be the cure.
Then . . . perhaps, by inspection (examination of the concepts and precepts) only, I'm being too hasty! Jumping to unwarranted conclusions! Please forgive my skepticism and (harder to do) any cynicism. (Just for the record, I quoted fictional detective Sam Spade, not Shakespeare.)

Maybe, after 30 plus years of production, Keihin carburetor engineers and manufacturers made (and repeated) a HORRIBLE MISTAKE!!!

And, perhaps a forum member discovered this colossal flaw, then developed an effective countermeasure, unleashing significant "free" additional horsepower, and improving fuel economy (you mention the KLX needle uses "too much" fuel). Silly me, I thought fuel-enriching a mixture was LIKELY to process more fuel than a fuel-lean mixture might.

So . . .grind a new profile on your needle on your bench grinder, lift said needle with an O-ring, and . . . harvest this bounty of performance and economy awakened after 30 years of dormancy. Please report the before-and-after results (e.g., from dyno runs/drag strip timing slips/competition experience/etc.). Best wishes for your success; may you retain your dreams and enjoy their fulfillment.

-----------------------------

I'm somehow reminded of this irrelevant anecdote: Back in the, "bad old days," when automobiles had carburetors, the legend was: This guy invented a carburetor that guaranteed 100 miles per gallon of gasoline for automobile engines of the day. Why wasn't this device ever marketed? The evil "fossil fuel" industrialists BOUGHT the patent, then sat on it (rather than producing and marketing the device) to this day, insuring all motorists would enjoy no more than the fuel efficiency of existing carburetor technology, thus using more fuel than they might with the innovative carburetor. The result from stifling the developmental carburetor? More profit for the petroleum and petro-chemical industrialists. Thus sayeth the legend!


“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 offline  
post #129 of 187 Old 09-24-2019, 10:31 PM
2nd Gear
 
Norton 850's Avatar
 
Join Date: Sep 2013
Location: Houston, Texas
Posts: 173
Quote:
Originally Posted by Damocles View Post
-----------------------------

I'm somehow reminded of this irrelevant anecdote: Back in the, "bad old days," when automobiles had carburetors, the legend was: This guy invented a carburetor that guaranteed 100 miles per gallon of gasoline for automobile engines of the day. Why wasn't this device ever marketed? The evil "fossil fuel" industrialists BOUGHT the patent, then sat on it (rather than producing and marketing the device) to this day, insuring all motorists would enjoy no more than the fuel efficiency of existing carburetor technology, thus using more fuel than they might with the innovative carburetor. The result from stifling the developmental carburetor? More profit for the petroleum and petro-chemical industrialists. Thus sayeth the legend!

I remember the 100 mpg carburetor legend well. The really sad part is that some folks believed it!

Jason
Damocles likes this.
Norton 850 is offline  
post #130 of 187 Old 09-25-2019, 09:26 AM
1st Gear
 
Join Date: Sep 2019
Posts: 16
Based on that logic EagleMike should have never bothered with the doohickey, the 22c mod should be ignored or thermobob or KLX needle swap, larger windshields, temp overlays etc. I like people who think outside the box and experiment and try to improve things! I know you question everything to the tenth degree mostly for the entertainment value i get it and enjoy your reading your posts as well as others is your favorite book War and Peace?

My original question was has anyone else tried this, no answers So i guess i will and report the results good bad or ugly just like the cam advance it works!
Retfird 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



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