Second Gen Carburetor Flaw Revealed!!!! - Page 3 - 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.

 9Likes
Reply
 
LinkBack Thread Tools Display Modes
post #21 of 66 Old 08-11-2019, 03:41 PM Thread Starter
1st Gear
 
JdgDReDD's Avatar
 
Join Date: Jul 2019
Location: West Central Canada
Posts: 65
Quote:
Originally Posted by pdwestman View Post
Are you trying to build a 'chopper KLR' or what. Lowering the rear & extending the forks will increase the steering rake & trail, won't this will Decrease the grip & control of the front tire on dirt / gravel / rocky roads?

Ride safe.
Yeah a chopper KLR, thats my goal ....... of course not


i don't like 90 % of the weight of the bike riding on the front wheel causing oscillations in the steering in the soft stuff, massive nose diving in corners etc etc put a few hundred pounds on the back and it wont do it. but u got a few hundred pounds on the back of the bike.


IMHO (h = honest not humble) the bike's balance is off for solo unloaded riding (expected even)

INCREASING Rake and trail increase high speed stability as a rule, and slows steering.

TRACTION is controlled by weight on the wheel. tire design etc.) and weight transfer greatly affects rear traction during hard take offs/acceleration of which my KLR had no weight transfer before the links. The front end would rise until the forks reached extension then i'd spin. This is exactly what i'm addressing.

There is excessive weight on the front end when riding unloaded and solo.

The .75" lower links on the rear have already increased the traction on the rear of the machine immensely and the weight transfer under acceleration is almost perfect now for My 175 lbs of rider. The fact that the link also reduced the rear spring effectiveness by about 7 % didn't hurt me either.

My KLR was an absolute pig before the lowering link. The front end wallowing in the soft stuff. Now its pretty good solo, won't be as good loaded or two up but it can quickly be changed back.

The lowering links alone OR the extension caps alone are probably enough, but i want to have a bit less weight on the front even with the lowering link installed so i'll have both.

Remember each is only 3/4 inch. So yes, if that will make it a chopper in your eyes. i can live with it. lol

I suspect my 3/4 inch extenders will sit between 1/4 - 3/8 Inch extension with the rear lowered. but will probably push the forks down a full inch with the stock link installed on the rear which is less likely even though my inseam is 33" so the height is no problem the softer seeming spring works and feels good to me.

Nice thing about the extension caps design, you can use 0-.75" as needed to fine tune the balance of the machine.

Been riding for 46 years, been a licensed bike mechanic for nearly 30 years. 20 in the trade, and ridden hundreds of different motorcycles. This is a cheap trick for solo riding and can easily be switched back to traveling mode.

Just about anyone should be able to feel the "Piggish" handling that mostly gets sloughed off because KLR's are known to be a heavy bike.

Who knows maybe my KLR is the only one that didn't handle great. DOESNT MATTER anymore, It sure does now ... if i was to load it for traveling i'd def put stock links back on to get the spring rate back and set the forks to 1/4 - 1/2" extension or so to level the Load.

Essentially i guess it allows a person to tune their KLR for sport riding (Solo unloaded) but can easily be switched back to a traveling config putting the stock links back in and lowering the front end back to stock height. Point is, you could choose for every riding condition and personal preference,

Last edited by JdgDReDD; 08-11-2019 at 06:53 PM.
JdgDReDD is offline  
Sponsored Links
Advertisement
 
post #22 of 66 Old 08-11-2019, 06:54 PM
5th Gear
 
Join Date: Jan 2011
Posts: 4,237
Quote:
Originally Posted by pdwestman View Post
Are you trying to build a 'chopper KLR' or what. Lowering the rear & extending the forks will increase the steering rake & trail, won't this will Decrease the grip & control of the front tire on dirt / gravel / rocky roads?

Ride safe.
"Easy Rider" (movie) fixation?

I jest!

Now, about those handlebar grip tassels . . .

Whatever the KLR owner wants for HIS bike!

Lowering links kinda compromise suspension, some men say, but . . . they'll do for a ride to Starbuck's (or, Tim Horton's)!

DISCLAIMER: My intent remains jocular!

As to DIY carburetor modification . . . in my misspent youth, I actually was in the company of a competitive Harley rider, who took his stock cams and ground them on a bench grinder, all by hand. His purpose: Increase valve lift/duration/overlap; all possible, but personally, I'd rely on the degreeing performed by WebCam or other professional grinders.

I consider an idle mixture offering easy starting, non-stalling, and minimizing deceleration popping adequate. Yet, I cannot criticize the search for the perfect (or optimum) idle mixture air/fuel ratio.

Ain't the first time I've posted this, but it illustrates the "parts" influencing mixture at different throttle (slide) openings:

JdgDReDD likes this.

“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

Last edited by Damocles; 08-11-2019 at 07:11 PM.
Damocles is offline  
post #23 of 66 Old 08-11-2019, 09:34 PM Thread Starter
1st Gear
 
JdgDReDD's Avatar
 
Join Date: Jul 2019
Location: West Central Canada
Posts: 65
Nice chart, pretty similar to the one i posted on the "Other KLR Forum". And exactly illustrates where my focus is, the 1/8 to 1/2 throttle area that is a major problem on a stock bike (lean enough to cause detonation), overheating and rod failures. Not to mention stressing rings and skirts. The problem exists well beyond 1/4 which is addressed as well. When we ride though normally we are on the pilot jet needle jet overlap area

Thanks for this



Quote:
Originally Posted by Damocles View Post
"Easy Rider" (movie) fixation?

I jest!

Now, about those handlebar grip tassels . . .

Whatever the KLR owner wants for HIS bike!

Lowering links kinda compromise suspension, some men say, but . . . they'll do for a ride to Starbuck's (or, Tim Horton's)!

DISCLAIMER: My intent remains jocular!

As to DIY carburetor modification . . . in my misspent youth, I actually was in the company of a competitive Harley rider, who took his stock cams and ground them on a bench grinder, all by hand. His purpose: Increase valve lift/duration/overlap; all possible, but personally, I'd rely on the degreeing performed by WebCam or other professional grinders.

I consider an idle mixture offering easy starting, non-stalling, and minimizing deceleration popping adequate. Yet, I cannot criticize the search for the perfect (or optimum) idle mixture air/fuel ratio.

Ain't the first time I've posted this, but it illustrates the "parts" influencing mixture at different throttle (slide) openings:


Last edited by JdgDReDD; 08-11-2019 at 09:37 PM.
JdgDReDD is offline  
 
post #24 of 66 Old 08-12-2019, 08:48 AM
5th Gear
 
Join Date: Jan 2011
Posts: 4,237
Quote:
Originally Posted by JdgDReDD View Post
Nice chart, pretty similar to the one i posted on the "Other KLR Forum". And exactly illustrates where my focus is, the 1/8 to 1/2 throttle area that is a major problem on a stock bike (lean enough to cause detonation), overheating and rod failures. Not to mention stressing rings and skirts. The problem exists well beyond 1/4 which is addressed as well. When we ride though normally we are on the pilot jet needle jet overlap area

Thanks for this
You're welcome! And, congratulations on your tremendous success from raising (and grinding) the needle!

In my view, raising the needle effectively shifts the curve marked, "needle clip position" to the right on the scale. Don't know of any cases myself of detonation, overheating and rod failures (or stressed rings and skirts) traceable to stock CVK40 jetting, but . . . these malfunctions and component failures may have abounded throughout KLR's production cycle (1987 through 2018 inclusively).

Now, what shall we NAME your mod? The, "22-cent mod" derives its nomenclature from the price of two # 4 washers, $ 0.22. At 11 cents per washer, your 7-washer configuration mod should accordingly be known as the, "77-cent mod." Later in your configuration, I understand you went with one washer and one #210 Buna-Nitril O-ring (installed as a spacer). Thus, the final version might be known as the, "11-cent (price of one # 4 washer) + (price of #210 Buna-Nitril O-ring)" mod!


“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

Last edited by Damocles; 08-15-2019 at 08:56 AM.
Damocles is offline  
post #25 of 66 Old 08-12-2019, 10:13 AM Thread Starter
1st Gear
 
JdgDReDD's Avatar
 
Join Date: Jul 2019
Location: West Central Canada
Posts: 65
I kinda like “JdgDReDD’s mega midrange mid” be as jdgdredd is from mega city 1

You try the mod yet? If not you will!

Going to put together jet kits and make them available to all

Jdg
JdgDReDD is offline  
post #26 of 66 Old 08-12-2019, 10:14 AM Thread Starter
1st Gear
 
JdgDReDD's Avatar
 
Join Date: Jul 2019
Location: West Central Canada
Posts: 65
JdgDReDD’s mega midrange mod


Going to get needles made of Billet aluminum and put together kits and put on ebay

Last edited by JdgDReDD; 08-12-2019 at 04:16 PM.
JdgDReDD is offline  
post #27 of 66 Old 08-12-2019, 03:58 PM Thread Starter
1st Gear
 
JdgDReDD's Avatar
 
Join Date: Jul 2019
Location: West Central Canada
Posts: 65
I'll post when i'm done its still evolving, got of work early so i started playing. The spark plug isnt right yet so
I think there is still more HP to be had.
had to order parts so it'll be a bit before i can proceed any further.
For shits n giggles i did add more shims to the modified needle to see how far it would take to make it run rich, And check my work, its pretty close.
the grind on the needle may change a bit in the future, requiring shims and allowing for more adjustment on the lean side.

Jdg

Last edited by JdgDReDD; 08-12-2019 at 05:56 PM.
JdgDReDD is offline  
post #28 of 66 Old 08-14-2019, 01:30 PM Thread Starter
1st Gear
 
JdgDReDD's Avatar
 
Join Date: Jul 2019
Location: West Central Canada
Posts: 65
I hate waiting for parts, i should have kits avail by week end.

i hope,
JdgDReDD is offline  
post #29 of 66 Old 08-14-2019, 08:26 PM
OverDrive
 
Join Date: Nov 2009
Location: Lander, Wyoming
Posts: 5,341
Quote:
Originally Posted by Damocles View Post
You're welcome! And, congratulations on your tremendous success from raising (and grinding) the needle!

In my view, raising the needle effectively shifts the curve marked, "needle clip position" to the right on the scale. Don't know of any cases myself of detonation, overheating and rod failures (or stressed rings and skirts) traceable to stock CVK40 jetting, but . . . these malfunctions and component failures may have abounded throughout KLR's production cycle (1987 through 1918 inclusively).

Now, what shall we NAME your mod? The, "22-cent mod" derives its nomenclature from the price of two # 4 washers, $ 0.22. At 11 cents per washer, your 7-washer configuration mod should accordingly be known as the, "77-cent mod." Later in your configuration, I understand you went with one washer and one #210 Buna-Nitril O-ring (installed as a spacer). Thus, the final version might be known as the, "11-cent (price of one # 4 washer) + (price of #210 Buna-Nitril O-ring)" mod!

1987 through 1918 inclusively? Really?

You EDIT it, I'll delete mine.

pdwestman
Modify at "YOUR OWN RISK"!

Still riding my 1987 KL650-A1. 84,000+ miles & counting
pdwestman is offline  
post #30 of 66 Old 08-15-2019, 08:54 AM
5th Gear
 
Join Date: Jan 2011
Posts: 4,237
Quote:
Originally Posted by pdwestman View Post
1987 through 1918 inclusively? Really?

You EDIT it, I'll delete mine.
Leave your correction post IN the forum, please!

The world needs evidence of the ONE TIME I ever made an error (even a typographical one!).



BTW: Got your order in for the forthcoming idle mixture optimization kit?

“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

Last edited by Damocles; 08-15-2019 at 08:57 AM.
Damocles 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