Carb question - 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 15 Old 03-18-2009, 04:48 PM Thread Starter
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Carb question

Getting ready to put on slip on exhaust, just the can someone please steer me right direction far as jet size and should I hack up my air box. I have K-N filter upgrade, some "posts" say to change alot and some say not to change anything, lookin for advise

Thanks guys

07 KLR650
04 Kawasaki Prarie 700 V-Twin

There is no replacement for displacement
If a turd dont stink dont poke it
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post #2 of 15 Old 03-18-2009, 07:07 PM
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http://www.klrforum.com/showthread.p...hlight=jardine
This should help give some insight...

2008 DL650 VStrom Yellow and Black
Previous ride was a 2007 KLR Black/Silver, I miss it..
Looking to get back into KLR's sometime soon.

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post #3 of 15 Old 03-18-2009, 07:18 PM Thread Starter
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Yes very handy thanks

07 KLR650
04 Kawasaki Prarie 700 V-Twin

There is no replacement for displacement
If a turd dont stink dont poke it
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post #4 of 15 Old 03-18-2009, 07:42 PM
 
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Here's where I'd start...

First, pop the cap off the idle mixture screw and set it at about 2 turns out from fully seated. If you get one of those adjustable mixture needles, you'll want to add at least another turn to that due to the difference in taper. You may have to remove the cap covering the screw by drilling a small hole into it. You can insert a wood screw to grab it and remove it from there. ***Don't drill too deep, just through the cap. You don't want to mess up the adjustment screw.

Second, do the 22cent mod also called the "smile maker" by shimming the needle with two #4 washers - use the stock main jet.
http://www.klrforum.com/showthread.php?t=5798
It is up to you whether or not you want to drill the slide while your in there. 7/64" is a very common size...its probably not a good idea to go bigger.

As for the air box, I'd start by pulling the snorkel. If you find it is running rich later, you can always comeback and cut into the air box.

Also, I've been using the K&N filter for a while and though its a great filter, I'm going to be switching to Uni or Twin Air. It is just too easy for dirt to get around the filter if you mess up the application of sealing grease.

An option to the "smile maker" would be to add a KLX needle which is adjustable. I'm running the KLX needle on the 3rd groove from the top with a 145 main, IIRC. The taper is more narrow on the KLX needle so you have to drop some jet sizes. I'm running a bit rich, so I would suggest starting with a 140 main if you go this route. I'm running a free flowing header, with no air box mods, for comparison. I think I'd be happy with just pulling the snorkel and going with a 142.5 main.

Here's some sources for the parts mentioned as well as a couple of others for some extras you might want to consider while you have the carb off.

Sources
KLX Needle..........Schnitz Racing -
http://www.schnitzracingstore.com/ca...299724&count=1
Adjustable Mixture Screw..........TPI -
http://www.tpi4x4.com/KLR650/AirAdjustingScrew.html
Allen Head Carb Screws..........Eagle Mike
Alloy Starter Choke Plunger..........Stead Engineering -
http://www.steadengineering.com/prod...=1&productId=7

Well, welcome to the forum and happy farkling. Let us know how it works out.
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post #5 of 15 Old 03-18-2009, 07:45 PM
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Ummmm, just an FYI - the K&N is not an upgrade for the KLR650. It often doesn't seal well and flow less air than the stock filter. I've seen dirt in the carb throat on bikes running k&N's. The late Cary Aspy had flow tested them, so this is no b.s.....

all the best,
Mike
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post #6 of 15 Old 03-18-2009, 08:21 PM Thread Starter
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Should I ditch the filter and go back to stock or a Uni???? The pipe I'm thinking of getting is a Two Brothers they say its specifically tuned to KLR so supposedly you don't have to re jet. Are they blow in smoke , also these #4 washers are they easily acceptable like from a hardware store

07 KLR650
04 Kawasaki Prarie 700 V-Twin

There is no replacement for displacement
If a turd dont stink dont poke it

Last edited by lefty650; 03-18-2009 at 08:29 PM. Reason: so much to learn so little time
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post #7 of 15 Old 03-18-2009, 08:27 PM
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Quote:
Originally Posted by lefty650 View Post
Should I ditch the filter and go back to stock or a Uni????
yes...........
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post #8 of 15 Old 03-20-2009, 06:30 PM Thread Starter
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Thanks for the input,tas2 u recommend to shim needle with washers, I ordered one of the adjustable mixing needles, I read in a post that you don't need to shim needle if its adjustable, is this true? Probably sound like a idiot but I,m a rider not a mechanic, although I,m trying to get to know this bike every little bit helps.

Also I went ahead and bought washers,SS so the bird behind counter would not sell me two, had to buy bag of 100 if anyone needs washers let me know I have a ample amount of nice shinny washers#4 I,ll send them to ya with a self addressed stamped envelope. I know postage is more than washers but I,m trying!!!

07 KLR650
04 Kawasaki Prarie 700 V-Twin

There is no replacement for displacement
If a turd dont stink dont poke it
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post #9 of 15 Old 03-20-2009, 09:37 PM
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The washers are the poor man's method of making the nonadjustable needle in the KLR adjustable. It works great as long as you don't modify the airbox.
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post #10 of 15 Old 03-22-2009, 09:34 PM Thread Starter
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Got me a Vance n Hines XCR coming, cant wait to hear her puuur! I,m going to shim the needle, don't know if I should drill slide or not I here mixed reviews. Anywho I,m gonna leave jet alone, pull snorkel, fudge with fuel screw maybe 21/2 out and slap that pipe on. Also I switched to original filter maybe get a Uni. Who knows I,ll see how she goes and keep ya posted.

07 KLR650
04 Kawasaki Prarie 700 V-Twin

There is no replacement for displacement
If a turd dont stink dont poke it
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