Nixter
Expert Class
Posts: 152
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posted July 15, 2014 07:53 PM
2012 ZX14R surging 2-5k rpm
I'm a little stumped, don't know best place to start. I just changed the tires on my bike and about to take it for a test ride. It starts and idles perfectly, but between 2-5k rpm while accelerating it surges, bad. Seems to be fine after 5k, and ok under de-acceleration. I'm half way through a tank of gas that was fine, so don't think its bad gas. Don't have any error codes. The only thing I could think happened was something happened to the traction control sensor. They physically look fine.
?????
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2012 ZX14R - Black
  
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Nixter
Expert Class
Posts: 152
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posted July 15, 2014 08:06 PM
Also, it is pretty much stock. No PC or extra electronics. Battery connection is tight.
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2012 ZX14R - Black
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AZFizik
Parking Attendant
Get a bigger hammer
Posts: 1
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posted July 16, 2014 10:01 AM
I'm thinking it might be the in tank filter for the fuel pump? Sounds like fuel starvation to me, and its a cheap fix, just gotta put the time into it.
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Nixter
Expert Class
Posts: 152
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posted July 16, 2014 11:07 AM
That's the next thing I was going to try. If that doesn't do it I will take it in. I have the extended warrantee, just hate the inconvenience.
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2012 ZX14R - Black
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MotoCycho
Expert Class
Posts: 337
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posted July 16, 2014 08:26 PM
Any sprocket changes?
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Nixter
Expert Class
Posts: 152
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posted July 17, 2014 12:44 PM
No. Just changed tires, but same size. I pulled the fuel pump and cleaned it & filter, no change. It is rough in first until 5k+, 2nd gear goes smooth right at 3500-3600 rpm every time. Third gear is a little lumpy until 3k. Runs fine after that. I'm starting to think it is something to do with ecu and secondary butterfly opening points?!! Everything is stock except slip ons.
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2012 ZX14R - Black
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Nixter
Expert Class
Posts: 152
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posted July 17, 2014 06:00 PM
 Edited By: Nixter on 18 Jul 2014 02:14
Fixed!!!!.........kind of..,,
I was doing some reading on the problems people had with a similar problem when changing gearing. That problem made about as much sense as the one I has after a simple tire change. I tried a CPU reset. No change. Tried a long ride so it could re learn, if that is even possible, no change. I had resorted taking it to the dealer and being bike less for who knows how long. Last ditch attempt, I physically disconnected the rear traction control sensor, and it is back to normal. Only took it for a short ride, but still no error code.
???
I am going to talk to the mechanics at the dealer and have them run this by Kawasaki. Seems like it should be a simple enough software fix. Only thing I can think that caused this would be maybe extra weight from new tire? It was way too much of a stutter for it to be a simple re learn.
FYI - turning TC off on the display does not really turn it off. Had to move sensor away from pick up to clear problem.
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2012 ZX14R - Black
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Shane661
Needs a life
Posts: 11494
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posted July 20, 2014 12:20 PM
Did you change the tire size/profile from stock? That might just do it.
Shane
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Nixter
Expert Class
Posts: 152
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posted July 22, 2014 08:56 PM
No, profile is the same. It is at the dealer now. Hopefully it is a bad sensor, otherwise it is a huge problem from just changing a tire.
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2012 ZX14R - Black
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1badzx12r
Needs a life
Posts: 8321
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posted July 23, 2014 03:59 AM
modern technology don't you just love it
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http://www.youtube.com/watch?v=S06nIz4scvI
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maze14
Parking Attendant
Posts: 1
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posted July 23, 2014 04:47 PM
sounds like your chain is too loose, check your slack.
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Nixter
Expert Class
Posts: 152
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posted July 24, 2014 04:46 PM
Chain is fine. Day # 3 at dealer. I just called them and they are stumped and calling Kawasaki tomorrow for direction.
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2012 ZX14R - Black
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MotoCycho
Expert Class
Posts: 337
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posted July 24, 2014 08:01 PM
Edited By: MotoCycho on 25 Jul 2014 04:04
Well.. I sure as fuck know what the surge feels like... the cause, and more importantly, the fix, is still up for grabs cuz it doesn't do it all the time or even on every bike. My 2013 14r bucks and surges with 17/43 gears. This sounds like the same issue even though you have not changed the gearing. I can reproduce the same thing on a Gen 1 with and a speedohealer set at -1.8 correction as well, regardless of the gearing. The more speed correction you subtract the better it gets until about -6 or -8 % and then auto-fucking-magically, it's completely gone. So tell me wtf there? I think that this issue on the Gen 1 and the gear change issue on the Gen 2 are causing the ECU to go whacky in the same way. Just a hunch tho.
I'll take a stab at your Gen 2 issue tho.. since your gears are stock and your and tire size is stock, I'll predict you have a faulty rear wheel speed sensor. It's sending out of tolerance voltage to the ECU and causing the surge as if something had been changed. With only a 1 tooth change on the rear causing this issue on a Gen 2, it's not hard to fathom that a speed sensor with only a 2-3% deviation from normal would cause the same effing thing to happen.
2 cents
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Nixter
Expert Class
Posts: 152
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posted July 24, 2014 09:05 PM
Edited By: Nixter on 25 Jul 2014 05:36
It is definitely the rear wheel sensor, especially since it is smooth as silk when you remove it from the caliper. Since the only thing I did from one day to the next was change the tires, I am leaning to.the fact tha the extra weight of the new tire threw the potentially bad sensor/ECU into a tailspin. Hopefully good news to follow.
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2012 ZX14R - Black
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Nixter
Expert Class
Posts: 152
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posted July 25, 2014 01:19 PM
Latest from the dealer is bad speed sensor. They are waiting for something from kawasaki. Hopefully not more than a day or two.
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2012 ZX14R - Black
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Nixter
Expert Class
Posts: 152
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posted August 01, 2014 10:49 AM
Really, really fixed this time. It was the rear speed/traction sensor. Not sure if there was a bad batch, but the new sensor is a lot closer to the pick up than the old one. Anyone having trouble after a sprocket change, I would check the gap on the rear sensor. It may be the bigger gap screws with the sensitivity.
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2012 ZX14R - Black
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MotoCycho
Expert Class
Posts: 337
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posted August 01, 2014 02:52 PM
quote:
Really, really fixed this time. It was the rear speed/traction sensor. Not sure if there was a bad batch, but the new sensor is a lot closer to the pick up than the old one. Anyone having trouble after a sprocket change, I would check the gap on the rear sensor. It may be the bigger gap screws with the sensitivity.
Tempted to just get a new one and install it to see what happens. 
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