Jet question - 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.

  • 1 Post By willys
  • 1 Post By tntom
  • 1 Post By DPelletier
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post #1 of 5 Old 04-04-2016, 09:00 PM Thread Starter
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Location: Knoxville, TN
Posts: 33
Jet question

Looking at the Lexx exhaust for my 2008. If I do how much rejecting will I have to do?


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post #2 of 5 Old 04-04-2016, 10:29 PM
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Join Date: Oct 2006
Location: Pefferlaw,Ontario
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Personally i would buy the KLX needle kit from Eagle Mike and use the correct jet for your area and if asked he will suggest which to use.....I'm roughly at sea level and used the 145 main and the clip in the centre or third slot with a 20 thou shim under it which is half a notch jump. BUT, I do have a none stock engine but am running the LEXX so imho you should use roughly the same jet and position, but it's a complete kit and the needle is completely adjustable. The 22 cent mod is a silly minute adjustment that we all did when we were noobs, and ok it did make a small small difference but for the cost of the KLX kit....simply put go for it!, That and a UNI filter and 4 one inch holes in the top of your airbox.
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post #3 of 5 Old 04-05-2016, 03:27 AM
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Join Date: May 2009
Location: Indiana/ Michigan line at the Lake
Posts: 1,585
The taper on the KLX needle has a narrower profile and differing degrees of taper.

I think, too it's better than just shimming the stock needle.

I'm happy with the basic .22, and a no clip KLX styled needle on stock jets.
My engine is not modified. Intake and exhaust opened up a bit but not radical.
(Mine's a Sporster needle lol)

This is my son, with whom I am well pleased." ----God
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post #4 of 5 Old 04-05-2016, 05:25 AM Thread Starter
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Location: Knoxville, TN
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Thanks, I have a UNI filter. Don't have the holes in the air box that would have to help. A few small things can make a big difference.

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post #5 of 5 Old 04-05-2016, 09:36 AM
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Join Date: Aug 2010
Location: Kelowna, B.C.
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For just the Lexx you probably could get away with the stock jetting, but I agree with the others; the KLX kit is the way to go. Go ahead and drill the airbox lid or do the L-mod (it does help flow with no real downside) but at the very least pull that snorkle!

Follow the instructions from EM on the jetting. My bikes both have the 4 - 1" holes, snorkle-ectomy, Uni/TwinAir, FMFQ4/LeoVince X3 and both run a 142 main, second position , no washer under and 2 turns on the fuel screw. Jetting is spot on at those settings; I live at 1200 ft above sea level and regularly ride to 5000 ft.

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