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PostPosted: Mon Feb 16, 2015 9:24 pm 
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Ninja Guru
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Location: Blackfoot, ID: ZX-9R sE1* & F1, both California EVAP models. * Supercruise capable
TBH, if you're going to tune carburetors you're gonna have to experiment in all the RPM ranges...AND to do it effectively, that means starting from the top and working your way down.

To address your results. Forget about how adjusting the PAS seems to affect mid-range. If it does, it would simply be from the fuel droplets making some change. Notice I used 'fuel droplets' and not 'fuel atomization.' There's are reason for that. Tuning at the Pilot Circuit to address problems in other carburetor fuel circuits is the lazy man's way and is highly inefficient, fuel wise.

You're really getting into your bike and don't appear afraid to make adjustments. That's good. You're ready for a study session with the Factory Pro CV Carb Tuning Procedure. Follow it and you cannot go wrong.

IIRC, throttle lag can be due to a mixture that is too rich or too lean. I'll have to look up where my latest discovery was on that. I have adjusted my F's float heights from 13mm up to 14mm, but there was just too much throttle lag: 14mm being leaner. While if I over oil my K&N air filter, which I've found substantially smooths out fuel circuit transitions and appears to make for EFI-style abrupt power response without any lag, if over oiled, I'll get nasty throttle lag from abrupt on/off/on transitions: from lack of air - a condition of being too rich. So to compromise I leave the float height at 13mm and also run the filter with slightly too much oil and 10w fork oil not recommended for the air filter. :lol: Seems odd, but there's something to be said about having spot-on TB response and if over-oiling the filter self-cleans after about 400 miles of typical use, that's a win in my book.

So if you're after ridding the popping, you're done. If you're not satisfied with the additional hesitation, you might want to consider setting the PAS back to something a little more conservative, like in the 1.5 - 1 5/8 range AND adding some more oil to your air filter (if it accepts oil) AND bumping the jet needle with some 0.8mm/0.032" height $0.15/ea fiber washers from Home Depot. The first and last ones are a fuel trade. Your engine gets about the same amount of fuel, but the JN does so from under the venturi slide, where it can be atomized and thus burned more effectively and efficiently.

Image

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PostPosted: Mon Feb 16, 2015 10:04 pm 
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BSB Rider
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Awesome info!

Thank you!

When i check the valves, I was planning to bring it back down to 2 or 2 1/4. I like the idea of 1 3/4 now after seeing your post. I think the idle circuit is too rich. It is not as easy to start now when hot. Like if I let it sit for about 5 minutes it takes a few more cranks to fire up.

I do have a K&N style air filter and Yoshi pipe. I would like to do the washer bump on the JN. I'll look more into that. Thank you again!

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PostPosted: Tue Feb 17, 2015 4:02 am 
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Ninja Guru
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Location: Blackfoot, ID: ZX-9R sE1* & F1, both California EVAP models. * Supercruise capable
NickH wrote:
...I think the idle circuit is too rich. It is not as easy to start now when hot. Like if I let it sit for about 5 minutes it takes a few more cranks to fire up...
Classic symptom right out of the FP procedure:

NOTE: A rich problem gets worse as the engine heats up.
...
NOTE: A lean problem gets better as the engine heats up.

:smt023

1 3/4 on the PAS is safe and certainly allowing for enough fuel for the engine to maintain idle RPM.

You'll find the fiber washers in the specialty drawers (by Nails/Screws) at Home Depot. I recommend splurging. :smt045 See the Home Depot link in my previous post for the exact dimensions and why.

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Kawasaki ZX-9R Ninja sE1. At the track she's said to be outclassed, but on the street, she reigns unmatched. dominating dominant sportsbike Kawasaki Yamaha suzuki Ducati Best Sport Bikes Available badass sportbike for long rides ZX-9R in action will dominate Best street bike Top 10 sport touring ZX9 long distance Ninja ZZR-600 ZZR-1100 ZZR-1200 blackbird R6 R1 CBR-600 1000 ZX6 ZX7 GSXR ZX9R zx-900 ZX10 ZX-10R ZX11 ZX12 ZX14 MPG miles per gallon


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PostPosted: Thu Feb 19, 2015 5:27 am 
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BSB Rider
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Turned them all down 1/2 turn. So now they're at 2 turns out. It's idling great now and is more rideable/driveable.
Hot start seems good too
Next weekend ill tackle valves and shims.

Thanks again!

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PostPosted: Thu Feb 19, 2015 8:05 am 
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Ninja Guru
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Location: Blackfoot, ID: ZX-9R sE1* & F1, both California EVAP models. * Supercruise capable
Condition: Mid-60's for your highs. PAS: 2.5 turns out. Result:Difficult hot starting.
Condition: Mid-60's for your highs. PAS: 2.0 turns out. Result:Better hot starting.

Wait until Summer.

:smt077

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Kawasaki ZX-9R Ninja sE1. At the track she's said to be outclassed, but on the street, she reigns unmatched. dominating dominant sportsbike Kawasaki Yamaha suzuki Ducati Best Sport Bikes Available badass sportbike for long rides ZX-9R in action will dominate Best street bike Top 10 sport touring ZX9 long distance Ninja ZZR-600 ZZR-1100 ZZR-1200 blackbird R6 R1 CBR-600 1000 ZX6 ZX7 GSXR ZX9R zx-900 ZX10 ZX-10R ZX11 ZX12 ZX14 MPG miles per gallon


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PostPosted: Thu Feb 19, 2015 8:07 am 
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Location: Blackfoot, ID: ZX-9R sE1* & F1, both California EVAP models. * Supercruise capable
NickH wrote:
...Next weekend ill tackle valves and shims...
Do you have all the new shims for doing the job? You're going to need some and tools.

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Kawasaki ZX-9R Ninja sE1. At the track she's said to be outclassed, but on the street, she reigns unmatched. dominating dominant sportsbike Kawasaki Yamaha suzuki Ducati Best Sport Bikes Available badass sportbike for long rides ZX-9R in action will dominate Best street bike Top 10 sport touring ZX9 long distance Ninja ZZR-600 ZZR-1100 ZZR-1200 blackbird R6 R1 CBR-600 1000 ZX6 ZX7 GSXR ZX9R zx-900 ZX10 ZX-10R ZX11 ZX12 ZX14 MPG miles per gallon


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PostPosted: Thu Feb 19, 2015 8:19 am 
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BSB Rider
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Nope. No valve shim kit yet.

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PostPosted: Thu Feb 19, 2015 8:20 am 
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BSB Rider
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e1_zx-9r wrote:

Wait until Summer.

:smt077


Better or worse for summer???

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PostPosted: Thu Feb 19, 2015 4:08 pm 
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Ninja Guru
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Location: Blackfoot, ID: ZX-9R sE1* & F1, both California EVAP models. * Supercruise capable
Ah.

Same as a few posts back. The formula doesn't change.

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Kawasaki ZX-9R Ninja sE1. At the track she's said to be outclassed, but on the street, she reigns unmatched. dominating dominant sportsbike Kawasaki Yamaha suzuki Ducati Best Sport Bikes Available badass sportbike for long rides ZX-9R in action will dominate Best street bike Top 10 sport touring ZX9 long distance Ninja ZZR-600 ZZR-1100 ZZR-1200 blackbird R6 R1 CBR-600 1000 ZX6 ZX7 GSXR ZX9R zx-900 ZX10 ZX-10R ZX11 ZX12 ZX14 MPG miles per gallon


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PostPosted: Thu Feb 19, 2015 4:18 pm 
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Location: Blackfoot, ID: ZX-9R sE1* & F1, both California EVAP models. * Supercruise capable
NickH wrote:
Nope. No valve shim kit yet.
Then you're not ready to dig into it. Either have a kit with 2.80, 2.85, 2.90 & 3.00 x 7.48/7.5mm shims ready or find a shop(s) that can supply them, before starting. You need to look into this more.

Getting to the shims is at least a two-hour project, where your cams will be taken out of the engine, the cam chain will be hung up on something to keep it from falling into the engine and bike parts will be everywhere. The full project can take as little as 4 hours, I typically go slow and it takes 6 to 8 hours before the bike's back together and ready to start. It's a serious all-day affair.

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Kawasaki ZX-9R Ninja sE1. At the track she's said to be outclassed, but on the street, she reigns unmatched. dominating dominant sportsbike Kawasaki Yamaha suzuki Ducati Best Sport Bikes Available badass sportbike for long rides ZX-9R in action will dominate Best street bike Top 10 sport touring ZX9 long distance Ninja ZZR-600 ZZR-1100 ZZR-1200 blackbird R6 R1 CBR-600 1000 ZX6 ZX7 GSXR ZX9R zx-900 ZX10 ZX-10R ZX11 ZX12 ZX14 MPG miles per gallon


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PostPosted: Thu Feb 19, 2015 4:51 pm 
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BSB Rider
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I've read up on the valve idjustment quite a bit. I was planning to order a kit this week. I've seen them on amazon for about $80.

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PostPosted: Thu Feb 19, 2015 6:17 pm 
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You wont need the full kit, but its hard to say for sure, normally just a Hot Cam Refill kit 16 would work. That's 5 of each from 2.70 to 2.95 mm, about 30 Dollars.

Put something like this into Google. "Hot Cams HCSHIM16 7.48mm O.D. x 2.70-2.95mm Shim Kit Refill Pack"

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Just got yourself a ZX-9R, then do your bike, and yourself a favour, read this thread. viewtopic.php?f=21&t=28097

Please will forum members put their bike model letter, & 1 or 2 after their Profile Location. eg: Your Town & B1,2,3,4 C1,2 E1,2 F1,2
As all zx9's are all slightly different, and I get fed up having to ask which model & number, as year may not be accurate.


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