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

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post #1 of 12 Old 02-27-2010, 01:13 AM Thread Starter
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KLX Needle Position

Hopefully some one can help me out here. I currently have the .22 cent Mod, L mod, Superttapp exhaust, and the PCV mod on my 04. I have a KLX needle just waiting to be installed, my question is, with the above mods what position would you recommend for the KLX needle? My bike is running better than it ever has, as posted before, but I have heard that the KLX needle will boost and increase throttle response and want to put it in during the storm we have coming in this weekend.
Thanks for your assistance.

Mark

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post #2 of 12 Old 02-27-2010, 05:03 AM
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Mark,
Never seen the needle, but I've read here that the center position is where the clip goes.
Duzzat sound right, fellas?
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post #3 of 12 Old 02-27-2010, 10:44 AM
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The starting point for the KLX needle for the KLR is second groove from the top. That is where mine is at.
It rained like hell here last night. The rain was driving in sideways and pounding on the bedroom window. Enjoy your rainy day.
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post #4 of 12 Old 02-27-2010, 10:48 AM
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That is where i started with mine I think I'm on #2 clip now not sure if its better than the 22 cent in my opinion or not there is a very small difference in throttle response to me but i like to try different combination to find what works.

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post #5 of 12 Old 02-27-2010, 11:03 AM
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Mark what jet are you going to run with KLX needle? I'm using a 142.5.
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post #6 of 12 Old 02-27-2010, 04:14 PM Thread Starter
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Quote:
Originally Posted by SLO-KLR View Post
Mark what jet are you going to run with KLX needle? I'm using a 142.5.
That was my next question, I believe that I have a 142.5 in it now. I will have to re-check when i take the carb down. I'll let you know when i get it opened up.

Mark

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post #7 of 12 Old 02-27-2010, 06:26 PM
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If you still have the stock needle and jet then you currently have a 148 main jet. I couldn't get my bike to run right with the L-mod and shimmed stock needle, it was too lean. That's why I went to the klx needle. A 140 main jet was reccommended and I ended up using a 142.5. The 140 was just too lean for my bike.
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post #8 of 12 Old 02-28-2010, 02:47 AM
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Something else to consider is the use of the #4 washer to split the difference of the slots on the KLX needle.

May I suggest you spend a lot of time reading about the aftermarket exhaust you have and the L Mod. You have many variables to deal with and that makes it difficult to find a base line when making changes / improvements.

Do you have an aftermarket air cleaner? What is the idle pilot screw set at? Do you still have the stock 650 piston and cylinder? Has the snorkle been removed?

When was the last time the engine ran well? What was the configuration when it ran well?

Why did you do the L Mod and install the aftermarket exhaust? Both of these are extreme modifications.

These are questions you need answer and document. This will help you properly tune your KLR engine.

Tim

2005 KLR 685
2015 Yamaha Super Tenere ES, 5/23/2015
2012 Yamaha Super Tenere; Purchased 7/30/2011; Sold 5/23/2015
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post #9 of 12 Old 02-28-2010, 10:34 PM Thread Starter
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Quote:
Originally Posted by tomatocity View Post
Something else to consider is the use of the #4 washer to split the difference of the slots on the KLX needle.

May I suggest you spend a lot of time reading about the aftermarket exhaust you have and the L Mod. You have many variables to deal with and that makes it difficult to find a base line when making changes / improvements.

Do you have an aftermarket air cleaner? What is the idle pilot screw set at? Do you still have the stock 650 piston and cylinder? Has the snorkle been removed?

When was the last time the engine ran well? What was the configuration when it ran well?

Why did you do the L Mod and install the aftermarket exhaust? Both of these are extreme modifications.

These are questions you need answer and document. This will help you properly tune your KLR engine.
I spent alot of time researching the mods over the past 2 years, the mods were not done due to a poorly running engine, just an engine that comes to California plugged up due to CA emission standards. I have spent the last 25+ years wrenching on my Sportsters, and as you may know the Sportys used the 40mm CV carb.

I have familiarized myself with tuning carbs by not being able to afford a mechanic when I was a teenager, so I learned alot by trial and error.

I asked about the KLX needle because I, like others, hope to pull the carb as few times as possible and get close to, or where I need to be with the needle position the first time.

I am a new comer to japanese bikes, as I rode Harleys most of my adult life, and Japanese bikes as a kid. I understand the principle of carb tuning, but was just hoping to get a little heads up on the needle position.

I appreciate all the help and will update as soon as I get the needle replaced. Since the weather was good taday, I decided to ride instead of pulling the carb. These last few weeks sunshine has been very sparse, so have to take advantage of it when it is out.

Thanks,

Mark

Mark

http://klr-650.blogspot.com/

Keep Me, Protect Me, Share Me - And I Will Live Forever.
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post #10 of 12 Old 03-01-2010, 01:27 AM
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Quote:
Originally Posted by sportster65 View Post
I spent alot of time researching the mods over the past 2 years, the mods were not done due to a poorly running engine, just an engine that comes to California plugged up due to CA emission standards. I have spent the last 25+ years wrenching on my Sportsters, and as you may know the Sportys used the 40mm CV carb.

I have familiarized myself with tuning carbs by not being able to afford a mechanic when I was a teenager, so I learned alot by trial and error.

I asked about the KLX needle because I, like others, hope to pull the carb as few times as possible and get close to, or where I need to be with the needle position the first time.

I am a new comer to japanese bikes, as I rode Harleys most of my adult life, and Japanese bikes as a kid. I understand the principle of carb tuning, but was just hoping to get a little heads up on the needle position.

I appreciate all the help and will update as soon as I get the needle replaced. Since the weather was good taday, I decided to ride instead of pulling the carb. These last few weeks sunshine has been very sparse, so have to take advantage of it when it is out.

Thanks,

Mark
The 50 States KLRs the emissions concerns are only parts and a little extra weight. The KLR comes very lean weather it is a 49 or 50 States KLR.
My concern was seeing you opened the airbox (lean) and installed an aftermarket exhaust (lean) while adding the 22 cents mod (light richness). A UNI or K&N filter would be more lean. The 22 cent mod usually only compensates for the stock lean condition. The cut airbox and aftermarket exhaust adds extreme lean.
Since you don't have a baseline I suggest you start with the second from the top notch with a #4 washer under the clip or don't use the washer and tape up the airbox. The 142.5 main jet is a proven main jet for a stock piston.

Another suggestion is to install a Thermo-bob to stablize operating temperatures.

Tim

2005 KLR 685
2015 Yamaha Super Tenere ES, 5/23/2015
2012 Yamaha Super Tenere; Purchased 7/30/2011; Sold 5/23/2015
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