Lean Carb Fix ? - 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 10 Old 07-04-2007, 08:07 AM Thread Starter
 
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Lean Carb Fix ?

Just to enlighten me ... would someone tell me what is the easiest way to drill out the bottom of the carb plug so I can fix the lean burning situation on my 07? Can I just loosen the throttle cables, loosen the clamps, turn the carb on its side and then drill out the plug? Also, what is the general thinking on how many turns out the screw should be set? I have a K&N Air Filter with no other mods to the system. My bike will "ping" if I jump on it. I do run regular fuel.
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post #2 of 10 Old 07-04-2007, 08:57 AM
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Go here:
http://www.klr650.marknet.us/Carb_AirMix.pdf

Is very easy to do. I just a very small drill bit, the plug is aluminum. Use light pressure so that when the drill goes thru, you don't booger up the mixture screw. Once the bit went thru, I put the drill up and used a 90 degree mechanics pick, prying the plug outwards. Then using a small straight slot screw driver, count the number of turns in, to see what the factory setting is, in case you ever need to readjust it. Once you know this, I would not go more than a 1/4 to 1/2 turn more than the factory setting. Mine was out 1 1/2 turns from factory, I now have it 2 turns out.

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post #3 of 10 Old 07-04-2007, 09:04 AM
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I have a pic of the plug and tool here:
http://www.klrforum.com/showthread.php?t=2579

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 #4 of 10 Old 07-04-2007, 09:36 AM
 
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You are right about just pulling the cables loose and spinning the carb on its side. I did what dxklr said and used a tiny bit and slowly drilled a hole. I couldnt find a good pic so i used a small metal screw to bite into the hole and then pulled on the screw with pliers. It pulls out really easy. I turned my screww out 3/4 of a turn more. I have stock filter but I did drill 6 1/4" holes around the center of my pipe. I haven't noticed any pinging ever, but I use 91 octane to be safe since it has been really warm lately. I just hit my 500 miles yesterday, so I will be getting my new pipe and jet kit on next wednsday.
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post #5 of 10 Old 07-04-2007, 11:08 AM
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My '02 was surging at steady throttle (sign of lean condition). I popped out my cap and found my screw run all the way tight. I ran it out 2.5 turns and haven't had a problem since.
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post #6 of 10 Old 07-04-2007, 11:40 AM
 
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hi all,
question, i just changed oil and filter. so i thought i would change
lean-rich mixture when i screwed the screw in to check setting
it took 4.5 turn in to seat. what problems should i have noticed???
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post #7 of 10 Old 07-04-2007, 11:43 AM
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Quote:
Originally Posted by bungi1 View Post
hi all,
question, i just changed oil and filter. so i thought i would change
lean-rich mixture when i screwed the screw in to check setting
it took 4.5 turn in to seat. what problems should i have noticed???
Maybe a touch more fuel consumption, and your plug might be a bit darker than normal. Other than that, it's just good that you caught it. It'll run a bit better with it in the correct turns, but you might not even notice that.
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post #8 of 10 Old 07-04-2007, 12:17 PM
 
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thanks,
wanted to be sure before i put it back together
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post #9 of 10 Old 07-27-2007, 07:25 AM
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Hey all,

The number of "turns out" on the mixture screw from the factory seems quite varied from bike to bike. What's the most and least the people have seen before modification?
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post #10 of 10 Old 07-27-2007, 09:18 PM
 
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Just to be different I drilled mine from the side. Adjusted the screw 2 1/4 turns out and my mileage actually went up from 50 to 53.9.
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