Better Throttle response-.22 Mod or J.D.? - 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 59 Old 04-04-2011, 09:24 AM Thread Starter
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Better Throttle response-.22 Mod or J.D.?

Here's the question of the day..........
This is on my '09 650
Just broke 1300 miles yesterday on trhe first "real" ride of 2011.
I bought it new last Sept, (this will be my 3rd KLR, they are such a good "all @ bike), brought it home, and before it had 100 miles I did the;
1. 22 cent mod (2-#4 washers, 3-1" holes, 1 step bigger main, air screw out 2 1/2 turns slide drilled with the 7/32?? drill), tossed the snorkel, filled the holes with filter foam
2. Doo
3. Thermo Bob kit
4. Cee-Bailey touring windshield
5. Chopped 1" off the kick stand
6. Battery Tender plug
At 1000 miles I threw on a Lexx muffler, (sounds pretty good, barky, but not loud)
Yesterday I went for ride, (I don't take this off road, my KTM and Gas-Gas trial bikes are for that), this is my "@ town bike, shrt trip bike, my commute bike.
Now, it had the "storage gas" in it with the "Stay-bil" in it, some dry gas, carb cleaner, so it not supposed to run great!
It did run, well like a KLR, didn't skip a beat.
I'd like to get a bit better throttle response out of it.
I asked my dealer when I got it if he'd get me a KLX needle and looked at me like I was from Mars!
Does anyone have THAT part number to help me out???
Would a JD kit, (I've used them with great success on my KTM's) help the response???
I'm thinking of dropping in a larger pilot to help that bottom power out, (everyonce in a while if I "blip" the throttle at a light, it'll stall- it's gotta be lean)
So.......................................
KLX needle and .22 or J.D. to help the response??
Joe
The bike is running great! I think I better tinker with it!

Last edited by joe28; 04-04-2011 at 09:26 AM.
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post #2 of 59 Old 04-04-2011, 10:05 AM
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KLX N1-TC adjustable needle 16009-11912
KLX needle clip 92037-1401
KLX needle spacer 92143-1667

ronayers.com typically has the lowest prices. I get a 20% discount on Kaw parts from a local dealer, so you may want to check around your neighborhood for similar local discounts. Most web-based sellers sock you with a potent shipping fee.



These items are sourced from a 2005 KLX300, and will function in the 2009 KLR 650 CV40 carburetor.

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post #3 of 59 Old 04-04-2011, 10:27 AM Thread Starter
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Groovie!
Now why the hell couldn't my local dealer help me out?????
It's not like he doesn't know me, I've been buying bikes outta there since the early 70's!
I had to explain to him the .22 mods,and all the other good stuff for the KLR!
I take it the spacer goes between the clip and the slide?
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post #4 of 59 Old 04-04-2011, 10:48 AM
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Nope. Goes on top.

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post #5 of 59 Old 04-04-2011, 11:18 AM
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Cynical contrarian comment . . .

ALL CV carburetord [posses the characteristic of "delayed throttle response," to some extent. Low relative ressure ("vacuum") must exist above the diap;hragm to raise the slide, admitting air-and-fuel mixture into the engine . . . the process takes some time.

Unless you add an accelerator pump and mechanical slide mechanism, you will live with an inherent lag in throttle response, be the delay ever so brief!

Of your modifications mentioned, slide drilling is the only one affecting "throttle response," in the literal meaning of the phrase, IMHO.

Messing with the needle contour and jets may provide you more optimum air/fuel ratios at different throttle openings, but . . . ain't gonna affect throttle response (literal scoped meaning), IMHO!

Opinion only; corrections and clarifications welcomed!
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post #6 of 59 Old 04-04-2011, 12:31 PM
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Quote:
Originally Posted by Damocles View Post
Cynical contrarian comment . . .

ALL CV carburetord [posses the characteristic of "delayed throttle response," to some extent. Low relative ressure ("vacuum") must exist above the diap;hragm to raise the slide, admitting air-and-fuel mixture into the engine . . . the process takes some time.

Unless you add an accelerator pump and mechanical slide mechanism, you will live with an inherent lag in throttle response, be the delay ever so brief!

Of your modifications mentioned, slide drilling is the only one affecting "throttle response," in the literal meaning of the phrase, IMHO.

Messing with the needle contour and jets may provide you more optimum air/fuel ratios at different throttle openings, but . . . ain't gonna affect throttle response (literal scoped meaning), IMHO!

Opinion only; corrections and clarifications welcomed!

Yea for sure not to mention the mild cam profiles, conservative head flow, heavy flywheel, etc.

A KLR will never be snappy like the OP's KTM or Gas Gas. Some people throw alot of money at a KLR trying to turn it into something they should have bought in the first place!

No eye has seen, no ear has heard, no mind has conceived what God has prepared for those who love him. 1 Cor 2:9
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post #7 of 59 Old 04-04-2011, 12:35 PM
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Quote:
Originally Posted by vatrader View Post
KLX N1-TC adjustable needle 16009-11912
KLX needle clip 92037-1401
KLX needle spacer 92143-1667

ronayers.com typically has the lowest prices. I get a 20% discount on Kaw parts from a local dealer, so you may want to check around your neighborhood for similar local discounts. Most web-based sellers sock you with a potent shipping fee.



These items are sourced from a 2005 KLX300, and will function in the 2009 KLR 650 CV40 carburetor.

Question, has anyone installed the KLX setup after running the washers (.22 mod) on the stock needle? Notice any difference? The stock needle does have a weird step/taper at the tip, makes me wonder.

No eye has seen, no ear has heard, no mind has conceived what God has prepared for those who love him. 1 Cor 2:9
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post #8 of 59 Old 04-04-2011, 02:35 PM
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WASHERS (or spacers) with a NOTCHED NEEDLE, are used for the purpose of increasing granularity of adjustment betwen notches, I think . . .

Make sense?

Didn't think so!
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post #9 of 59 Old 04-04-2011, 03:12 PM
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Quote:
Originally Posted by Spec View Post
Question, has anyone installed the KLX setup after running the washers (.22 mod) on the stock needle? Notice any difference? The stock needle does have a weird step/taper at the tip, makes me wonder.
Yep, I have! It feels much smother at all RPMs, IMO. If you are happy with the .22 mod, you will be that much happier with the KLX needle. I would go with the 142 jet as the needle is much more aggressive. This was suggested by KLR Cary if your running the stock piston or the 685 with the stock head.
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post #10 of 59 Old 04-04-2011, 04:54 PM
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Quote:
Originally Posted by Spec View Post

A KLR will never be snappy like the OP's KTM or Gas Gas. Some people throw alot of money at a KLR trying to turn it into something they should have bought in the first place!
Spot on!! Some bikes are fast, and some can be made fast cheaply.. The KLR's not one of them.. My KDX200 would RIP after I put a different pipe and silencer on it, and opened up the air box and rejetted.. It was like a new bike, but it still had KDX suspension.

Had I just bought a KTM 200EXC in the first place, I woudn't have needed to modify anything, and it would still make 5 more hp than the KDX..

We learn, or we don't..
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