Lsantana954
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posted August 14, 2012 01:21 PM
ZX14R 2 gear hesitation/stutter
ok im going to try and explain this as best as possible..in 2nd gear during light to moderate acceleration when ever i go over any bumps or any dips it feels as if there is a noticeable stutter or hesitation, any ideas as to what could be causing it? It only does it on 2nd gear and its always been doing this every since ive had the back.
Another thing before i started putting miles on the bike i had the swing arm installed and stretched, could it be caused by the stretch?
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'12 Gully Blue ZX14
-PCV/Guhl ECU/Blue CT Meg/<0 Alyson Oil/+8 Evil Arm/+1 Rear Sprocket
'07 Acura TL-S
'87 Buick Grand National
  
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Seno
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posted August 14, 2012 03:19 PM
 Edited By: Seno on 14 Aug 2012 23:19
Let me guess....Change the gearing? 3500-5500 RPM? If so read this thread....
http://www.bikeland.org/board/viewthread.php?FID=27&TID=69000&pagenumber=1
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2012 Black 14R -> Completely done!
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Lsantana954
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posted August 14, 2012 04:56 PM
yes i did go up 1 on the rear...reading the link now
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'12 Gully Blue ZX14
-PCV/Guhl ECU/Blue CT Meg/<0 Alyson Oil/+8 Evil Arm/+1 Rear Sprocket
'07 Acura TL-S
'87 Buick Grand National
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Lsantana954
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posted August 14, 2012 05:10 PM
well guess ill go back to stock rear gearing when it comes time for sprocket, hopefully someone will find a solution for this before hand.
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'12 Gully Blue ZX14
-PCV/Guhl ECU/Blue CT Meg/<0 Alyson Oil/+8 Evil Arm/+1 Rear Sprocket
'07 Acura TL-S
'87 Buick Grand National
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blue07
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posted August 15, 2012 11:39 AM
Edited By: blue07 on 15 Aug 2012 19:55
I'll throw in one deal that I DID notice...which probably doesn't apply here..BUT...there have been a couple of times...while riding along...that I felt a 'noticeable' 'hang' in velocity.Subtle.It was the ROAD surface on the tires doing it.Sounds dumb and impossible I know...but it's happened a few times at different places.And I don't mean 'rough spots' either.When it first happened,I had to look at my display to see if something was 'erroring' on there.It was that noticeable...but everything was fine...not the bike.Just a thought here...course,the wouldn't explain an engine stutter...but it sounds like the KTRC is somehow doing something with your bike(s).IDK how or why....but the stutter deal sounds like KTRC.(to me).
This is definitely a LONG SHOT...okay...but when I reinstalled my secondaries...I didn't have one of em lined up just right.My engine coded 62....I removed em again...issue was gone.The point I'm saying here is...MAYBE your secondaries are possibly hanging up along the opening range somehow?Maybe one is rubbing ever so slightly at that particular opening value?IDK.I didn't know they could do that...but I found out.
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blue07
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posted August 15, 2012 11:41 AM
Edited By: blue07 on 15 Aug 2012 19:50
I can't find any problem running that 43 on there...I just bought a brand new one as well...gonna install it tonight.Guess it COULD affect the computer somehow?It's not affecting mine though...very odd indeed.
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Seno
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posted August 15, 2012 12:18 PM
Yes, Blue07... It is odd indeed. Some bikes completely stock with a different sprocket do it, some dont. Some with tons of mods do it and some dont..... I am glad that others are noticing this issue, frankly at first I thought the guys who were doing the ECUleashed testing had screwed up my bike somehow..... I hope someone figures it out, or how to get rid of this stutter.
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2012 Black 14R -> Completely done!
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WRECKSHOP
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posted August 15, 2012 12:30 PM
Check that Power Commander. They are known to have issues to go out.
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Shane661
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posted August 15, 2012 12:32 PM
It is not power commander related. When you swap sprockets, it does not affect your mapping. No offense to anyone, but this is an ECU issue....even if other bandaids are found.
Shane
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Seno
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posted August 15, 2012 01:25 PM
quote:
Check that Power Commander. They are known to have issues to go out.
Thank you for the idea, it's been checked and gone through. If you have 5 minutes read this thread http://www.bikeland.org/board/viewthread.php?FID=27&TID=69000&pagenumber=1, it goes into the fixes that were tried and you will see the only common piece of the puzzle is the sprocket change.
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2012 Black 14R -> Completely done!
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Lsantana954
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posted August 15, 2012 02:45 PM
it is really noticeable on the rough rodes, also my secondaries have been removed...and i dont believe it to be power commander related due to the fact that it was doing this prior to installing the power commander...i think i still have to stock sprocket so if i get some time i might swap it out and see what happens.
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'12 Gully Blue ZX14
-PCV/Guhl ECU/Blue CT Meg/<0 Alyson Oil/+8 Evil Arm/+1 Rear Sprocket
'07 Acura TL-S
'87 Buick Grand National
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blue07
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posted August 15, 2012 09:41 PM
Edited By: blue07 on 16 Aug 2012 05:47
I wish I could feel what you guys are talking about.It is very odd that some would have this with a gearing change...and others not.I'm putting a brand new 43 on mine in just a few minutes...to replace my 'partially' worn 43.Riding tomorrow...see how she does.You know...there was a teensy thing I noticed about mine...a couple of times...it was so fast and quick...I don't know what it was exactly.But I remember hitting a hole or a sharp bump in the road....it did sound as if it 'stopped' for a split second.Nothing serious...nothing to really make me think about it...but she did seem to 'stop' momentarily.That's the only 'thing' I now remember about the bump...or whatever it was on the road.I think I just chalked it up to having the wheel possibly leave the ground for a split second?IDK...Only when the rear did it...the front didn't seem to be part of the deal.
It certainly wasn't a stutter,or a stumble though...more like a microsecond 'stopping'of the engine.So fast...you really wouldn't notice it if you weren't anal like I am. 
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blue07
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posted August 15, 2012 09:50 PM
"it is really noticeable on the rough rodes"...you don't suppose the rear wheel is coming off the ground some way the surface is bumping it?Maybe causing the KTRC to activate...it would make sense...seeing how the KTRC is supposed to be maintaining grip over 'most' road surfaces.?????
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Lsantana954
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posted August 16, 2012 12:32 AM
im going to check to see if my buddy will lend me his gopro cam, you can also hear it via the exhaust, and ill post it.
No i dont think the wheel is coming off the ground.
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'12 Gully Blue ZX14
-PCV/Guhl ECU/Blue CT Meg/<0 Alyson Oil/+8 Evil Arm/+1 Rear Sprocket
'07 Acura TL-S
'87 Buick Grand National
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blue07
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posted August 16, 2012 07:21 PM
Edited By: blue07 on 17 Aug 2012 03:24
The only thing that I could notice today on my ride(with 17/43 sprocket...was...and it's kinda always been there...is a teensy...and I mean TEENSY 'miss' if you could call it that when shifting from 1st to second.It doesn't continue as I open the throttle.It's so brief,it barely is noticeable.Only when the load off off the motor,and the transition happens.VERY quick...not a stumble...sounds like a 'cut' of power...a burble?Yes...that'd be a better term.Kind of a tiny pop...but not quite..Doesn't jerk the bike or anything.LESS than a split second.Definitely doesn't conyinue after the shift...even if I drop back down to that RPM and stay there at neutral throttle....in any gear...it doesn't do it at all in the upper gears at speed...least I can't detect it.
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Obba
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posted August 17, 2012 01:57 PM
Crazy, but i'll throw it out there..
Wouldn't be to the metalology of the sprockets. As in there's a magnetic pickup somewhere that might be misreading the signal and it's upsetting the ECU?
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Obba
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posted August 17, 2012 02:01 PM
Crazy, but i'll throw it out there..
Wouldn't be to the metalology of the sprockets. As in there's a magnetic pickup somewhere that might be misreading the signal and it's upsetting the ECU?
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Seno
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posted August 17, 2012 03:21 PM
Anything is possibly...
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2012 Black 14R -> Completely done!
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blue07
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posted August 17, 2012 07:30 PM
You know...I never thought of that...maybe...My sprockets are steel...so IDK.
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GREYHOUNDMOSES
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posted August 18, 2012 01:51 AM
Not knocking the suggestion. "conventional" thinking hasn't produced an answer.
However the pickup is on the brake side so I can't see the sprocket material being a factor.
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Shane661
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posted August 18, 2012 03:21 AM
Edited By: Shane661 on 18 Aug 2012 11:24
It definitely seems ecu related...it sounds just like the traction control when it starts to sputter. Since it does it with traction control off, that points to a glitch in ecu programming to me. I have had many fuel injected machines, swapped sprockets, etc...and never has it created any glitch in the bike.
As I say, I tested these sprockets same day, back to back, 15 minutes apart. Both were aluminum Vortex sprockets of the same model. It does not seem to be related any specific aftermarket ecu flash, as it has been observed in stock, and mutiple different ecu flashes.
I seem to recall that Adams Performance has also mentioned that they have observed the glitch in numerous bikes.
Shane
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blue07
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posted August 18, 2012 11:27 AM
I tried again last night to create the deal you're talking about...she won't do it.43 rear...steel...Driven sprocket.Used two different ECU's...my stock one and my Guhl's one...both worked fine.No flies in my bike.Actually like the Guhl's one better....seems to be a touch smoother and definitely more responsive.
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Shane661
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posted August 18, 2012 01:00 PM
quote:
I tried again last night to create the deal you're talking about...she won't do it.43 rear...steel...Driven sprocket.Used two different ECU's...my stock one and my Guhl's one...both worked fine.No flies in my bike.Actually like the Guhl's one better....seems to be a touch smoother and definitely more responsive.
Well, you've made it pretty clear that you are not affected. But myself and many others have noticed it. Believe me, it is not suble.
So, at some point it will be figured out. Until then, I am pretty much over it as I am not sweating one tooth of gear.
Shane
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blue07
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posted August 18, 2012 09:50 PM
So you're saying that going back to stock gearing...and no other changes is correcting this deal?No ecu change affects it...????Factory gearing or not.No mapping...only the gear?
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Shane661
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posted August 19, 2012 07:31 AM
Edited By: Shane661 on 19 Aug 2012 15:32
quote:
So you're saying that going back to stock gearing...and no other changes is correcting this deal?No ecu change affects it...????Factory gearing or not.No mapping...only the gear?
No offense man, but I put that in my initial post on the matter. You have been debating it for a week...without reading what I wrote?
http://www.bikeland.org/board/viewthread.php?FID=27&TID=69000&set_time=
Shane
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