Tuning the Carb: 22 Cent Mod vs. Jet Kit - 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.

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post #1 of 76 Old 12-12-2018, 08:51 PM Thread Starter
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Tuning the Carb: 22 Cent Mod vs. Jet Kit

Just wondering whether it would be wiser for me to do the 22 Cent Mod or go the KLX Needle and new jets route. Currently my 2017 is surging (slightly but noticably) while cruising, and popping through the exhaust (again, slightly) when engine braking from cruising RPMs. I basically just want it to work right, but of course a bit more power would be welcome. The .22 mod seems like a good choice, well tested etc., and has the bonus quality of using mostly stock parts. Also, I'm concerned that if I start messing with the jets, it will be lot more trial and error << this wouldn't be all bad, but I'm curious to hear from the group: Are there any advantages to putting in the new needle and jet, if I'm sticking with stock exhaust? If I start re-jetting, am I going to also want to do the L mod, again, considering the stock exhaust?
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post #2 of 76 Old 12-12-2018, 09:13 PM
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Both are tried and true, both work, but the KLX is the way to go. The 22 cent mod will richen things just a tad, enough to get rid of the lean surge. The needle is the same, though, with the stupid-rich full throttle. The KLX has a completely different taper and richens things up more properly. It also has tunability into the future if you decide to mod things up a bit.

There is no experimenting required, either. It's like making Tollhouse cookies with the recipe on the bag. Buy the kit, follow the directions for what you have on your bike and it will work.

It's $50 vs 22 cents, but most people think it worthwhile.

You can do it to a completely stock bike. It will give you a more responsive throttle, The bike will be peppier with more vim, vigor, and vitality, but don't expect to do roll-on wheelies. KLRs don't do roll-on wheelies.
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post #3 of 76 Old 12-12-2018, 09:27 PM Thread Starter
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Awesome, I'll go ahead and order up the KLX kit from Eagle Mike. Besides the allen screws for the carb, is there anything else I should think about putting on at the same time? I was poking around yesterday and found some mention of a metal replacement for that little plastic knuckle that the choke cable goes through — the one that breaks so easily — but I can't find the page again…
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post #4 of 76 Old 12-12-2018, 10:34 PM
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If you haven't done the balancer lever you ought to. Just get the lever kit if you like; you can swing by here and use my tools.

The choke piece you're thinking of is by Stead Engineering. It's here.

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post #5 of 76 Old 12-12-2018, 10:56 PM Thread Starter
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I will take you up on that, Tom. As long you're not a serial murderer using KLRForum to lure unsuspecting victims and their motorbikes to your lair… Could it be, this is the true meaning of the shed of horrors??

Last edited by samuel; 12-12-2018 at 10:58 PM.
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post #6 of 76 Old 12-13-2018, 06:29 AM
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Then . . . there's the knurled-knob fuel screw, or my preference: The T-handled fuel screw from Kouban!

Unnecessary, in my view, albeit convenient, the one time the fuel screw is adjusted (unless you're splitting time between Puerto Vallarto, Mexico, and the Nepal Himalayan Base Camp).

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post #7 of 76 Old 12-13-2018, 09:36 AM
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well, I was going to comment but Tom said everything that needed to be said. ......somehow I still managed to post though! LOL


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post #8 of 76 Old 12-13-2018, 10:11 AM
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I suggest that Dave & Tom both forgot to say that the 22cent mod works fine on a stock air box or stock box minus snorkel.

But the KLX needle & main jet work best with the snorkel removed & 4 one inch holes or the complete "L" mod performed to the top of the air box.
Partly because the original dirt model KLX650 which these parts are borrowed from breathes thru a 6 x 6 opening in the top of the air box.

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post #9 of 76 Old 12-13-2018, 01:47 PM
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good point about the airflow Paul though "fine" to me means "not as good as the KLX needle" Yes you need to remove the snorkle with the KLX kit but the data I've seen suggests that the KLX kit is better than the 22 cent mod even without the L mod or equivalent for the reasons Tom mentioned

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post #10 of 76 Old 12-13-2018, 06:42 PM Thread Starter
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Quote:
Yes you need to remove the snorkle with the KLX kit but the data I've seen suggests that the KLX kit is better than the 22 cent mod even without the L mod or equivalent for the reasons Tom mentioned
Thanks for the clarification. So it sounds like if I go with the kit, I'll definitely need to remove the snorkel, and there's more to be gained if I do the L mod as well, but the latter is optional. Right?
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