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BIKELAND > FORUMS > ZX-14.com > Thread: Removed secondary butterfly valves!! NEW TOPIC NEW POLL POST REPLY
gtracing


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Posts: 159
posted June 05, 2006 01:33 AM        Edited By: gtracing on 5 Jun 2006 10:59
Removed secondary butterfly valves!!

Somoene on another forum removed the butterfly valves, and claims to have fixed the low RPM problem.

Here is the initial post

Found out how to make the ZX-14 fast at low rpm, remove the secondary butterfly valves in the injectors, when doing this make sure you have a proper fitting screwdriver, (t-handle) so you dont strip the screws out, they have lock tight on them. maybe RichCraft will post up on the easy fix for more power, he weighs 300lbs im 200 and my GSXR-1000 doesnt pull him by much! When he pipes it, it will be scary. We raced a week ago and I beat him pretty easy, we didnt talk tonight after racing but what I can see is the secondarys effect it in all rpm range, that bike is fast! weeee

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nightmare


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ACP Racing
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posted June 05, 2006 02:01 AM        
How bad did you beat him and what mods do you have on you 1000?
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gtracing


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Posts: 159
posted June 05, 2006 02:02 AM        
not me, I just copy/pasted it from another forum. I'm taking off my gas tank right now to have a look at them, will let you know if and when I can get the secondary throttle plates off. I did something similar on my Subaru(also had secondary valve plates for emisions purposes).
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gtracing


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Posts: 159
posted June 05, 2006 02:19 AM        Edited By: gtracing on 5 Jun 2006 10:20
ok, getting the plates off is really easy.. Just make sure you use a magnetic screwdriver. You don't need to take the tank off, just prop it up with something. Also, make sure you apply lots of pressure to the philips head screws as they seem really easy to strip(they also have locktite on them).
Still taking them out... here is a pic of a stock secondary plate next to one removed

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dubious


Needs a life
Needs more time to ride!
Posts: 8442
posted June 05, 2006 02:47 AM        
yeah let us know how she runs!

A pipe, 16 tooth and this mod if it works is gonna be RERERE RETARDED!
See its fucking me up alreready!
____________
natural selection.....
destiny will overcome intervention.
Some are not worthy of the effort.

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gtracing


Expert Class
Posts: 159
posted June 05, 2006 02:57 AM        
Ok, I can now see why kawi would do this to the bike... The bike is 100x more responsive than before. Rev-matching on downshifts seems to be more effortless, and the first thing I noticed when starting is that the rev's jump much faster. It took a little getting used to as the front would jump easily in first gear with even minor input.
I only did a quick run around the block, but I think this is the best free mod I have ever done. I did notice a slight stumble when taking off in a higher gear for the first time(should have disconected the battery). But only noticed that once, and never again(I tried to replicate it).
I will have some more time to ride later on tonight, will post some more thoughts then.

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zerMATT


Pro
Posts: 1931
posted June 05, 2006 03:01 AM        
Ok - how about this: Remove the plates and drill a couple of medium-sized holes in each, the reinstall? That would give it a "little" more air, but not make it 100x more jumpy... might that work??

Great discovery by the way... thanks for the info, and keep us posted!!
____________
'06 Passion Red ZX-14 | Black D&D Slip-ons | Speedo Healer | V1 | zumo 550 | Heli-Risers | PhantomX

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frEEk


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ummm... yeah
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posted June 05, 2006 03:07 AM        
keep in mind u'll probably loose all the smoothness of the stock FI this way. you'll be back to early 12R-ish FI, which was universally regarded as "snatchy" at best.
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gtracing


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Posts: 159
posted June 05, 2006 03:09 AM        
I think it's just going to take a little getting used to. I'm so used to the way it was stock, that I'm trying to ride it the same.
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Drowland


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posted June 05, 2006 03:21 AM        
Tell us more

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kawy10r


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posted June 05, 2006 03:25 AM        Edited By: kawy10r on 5 Jun 2006 11:27
I TRYED THAT WITH MY 04 ZX10 AND ACTUALLY LOST SOME LOW END POWER AND SEEM TO GAIN A LITTLE TOP END. IS THE BEING TESTED ON THE DYNO? THE SECONDARY'S ARE USED TO BOOST LOW END POWER. IT IS CONTROLLED BY THE ECU.
____________
kawy

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gtracing


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Posts: 159
posted June 05, 2006 03:38 AM        
I just went for another ride, and I must say there is no noticeable decrease in the smoothness of the FI. It seems to idle a little diff, but riding there is no diff that I can tell(except low end power) There is deff. a gain in the low end, didn't spend much time above 7-8k.. But responsiveness is much better. These results are all posted from the butt dyno... I don't want to spend the money right now as I will have to do it again with the pipe/pc once I can decide on which pipe to get(or wait for others).
Again, all this could be in my head!!! But my butt tells me otherwise.
Try it out, not that much work and you can always put the bolts/plates back in(just be sure not to strip them)

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dubious


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Needs more time to ride!
Posts: 8442
posted June 05, 2006 03:45 AM        
I'm at work for next couple days.
Won't have time to play.

Some others (Brock) want to try this and let us know .....Dyno etc?
.... good work gtracin!
____________
natural selection.....
destiny will overcome intervention.
Some are not worthy of the effort.

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speedgene


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posted June 05, 2006 03:58 AM        


It's sort of a waste because you still have the Mikuni gear box, and the "SUBTHROTTLE'S" TPS still attached to the sub's bar. The subthrottle's electronics still commands the "MAIN" via ECU/sensors/temp/etc.... Who said Redundant?

Play with the air screws... what do you have to lose?

____________
E-tard

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gtracing


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Posts: 159
posted June 05, 2006 04:07 AM        
I would think that the ECU controlls the Subthrottle plates, not the throttle plates controll the ECU. I know on my STI the secondary throttle plates were there for emisions purposes, and removed I gained something like 15whp up top. Removing them did absolutely nothing to the stock ECU as long as the plate rods remained in tact.
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Y2KZX12R


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posted June 05, 2006 04:27 AM        
Speedgene, I dont think the primairy throttle blades are flybywire. Just the sub throttle blades are.
My only question is... is the bike going real lean thinking that the secondary throttle blades are restricting the total airflow so the fuel is cut back to match the secondary blade positions?
____________
Y2KZX12R
CompetitionCNC.com

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gtracing


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Posts: 159
posted June 05, 2006 04:31 AM        
I don't know about the bike running lean, but you are right about the throttle plates.
The mains are controlled by cable(your wrist), and the secondaries are controlled electronically.

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stan55


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posted June 05, 2006 04:50 AM        
GTracing,


Could you let us know the fuel mileage, and also how the bike is Running.

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VPN


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Posts: 718
posted June 05, 2006 05:08 AM        
But wasn't the bike overly rich for starters
That way any leanness would not hurt that much
If that is the fix (+TRE & PCIII)
I will certainly reconsider ZX-14/ZZR-1400 instead of the good old "Little-Busa"
or instead of the the new upcoming "Big-Busa" (it might come as late as 2008)
Hmmm. GTR-1400....

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Drowland


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posted June 05, 2006 05:23 AM        
VPN u still dreaming?? Hell we looking for mods these days
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VPN


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Posts: 718
posted June 05, 2006 05:41 AM        
Why would I buy a bike immediately and get all the trouble
The bike costs double the US price here
I could get two of them in the US in price of one in Finland
OR
if I were unlucky enough to live in Denmark
I would have to pay triple price
SheeschZZ !!
Even the gasoline is far more expensive here at almost 1,50 per liter
I guess you get a gallon with that money, right?
Yes - I'm still dreaming of a modern Sport-Touring bike with Busa pull

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serius blk


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Posts: 543
posted June 05, 2006 05:55 AM        
I think that is only a partial fix. I bet it does help and its free. But remember the computer also retards the timing until a certain rpm. If it helps some that would be ok. Someone has to go in the ecm. Then we'll really see a difference
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VPN


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Posts: 718
posted June 05, 2006 05:57 AM        
PC3R or TRE or other such devices?

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droid


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posted June 05, 2006 07:07 AM        
Warm your screws with a soldering iron first, melts the loctite!!
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Drowland


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Posts: 733
posted June 05, 2006 07:09 AM        
quote:
Why would I buy a bike immediately and get all the trouble
The bike costs double the US price here
I could get two of them in the US in price of one in Finland
OR
if I were unlucky enough to live in Denmark
I would have to pay triple price
SheeschZZ !!
Even the gasoline is far more expensive here at almost 1,50 per liter
I guess you get a gallon with that money, right?
Yes - I'm still dreaming of a modern Sport-Touring bike with Busa pull
[/quote

How come you don't move???

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