cincykz
Parking Attendant
Posts: 14
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posted August 30, 2012 02:48 PM
no power at high revs
Hi all, I have a 2005 12 with 10,000 miles.
It does not have all the topend power that everyone talks about, and the revs slow as you get closer to redline. I've never hit the limiter.
There's decent power low down and lots in the middle (up to about 8k), but it smoothly tapers off. this is the opposite of what I've heard, and was wondering if anybody has any ideas.
Please help!
  
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cincykz
Parking Attendant
Posts: 14
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posted August 30, 2012 03:04 PM
More info:
The bike has Akrapovic full exhaust, the muzzy emissions delete caps, and I have a power commander that was installed and i removed it to see if that was the issue (it wasn't.)
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tuusinii
Pro
Posts: 1031
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posted August 31, 2012 02:36 AM
Check easy stuff first: air filter, fuel filter, plugs, fresh fuel... Does it give some FI error light? Also malfunctioning TPS sensor could do that. Also check IAP (Inlet Air Pressure) and APS (Atmospheric Pressure Sensor). As it's 2000 model TPS and IAP can be crossed and that kills the IAP sensor.
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biggmoinc
Zone Head
Posts: 747
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posted August 31, 2012 05:16 AM
That thing shoulnt actually truly come alive til 7500 on up, mine feels like a 2stroke, is it just starting this problem or r u a new owner? If its not fuel/degrading fuel pump/filter, im betting one of the sensors gone up, try n swap ur sensors with another 12, @ least u can eliminate those without cost, chime back in if u figure it out just to satisfy others curiosity, never know, someone else may run into same issue
____________
07 ZX14 bmc filter, muzzy m14, 16/44,66",auto shift, 6'3, 204lbs/1.54/3.99/6.03@120/7.8/9.32@147
biggmo@aol.com
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cincykz
Parking Attendant
Posts: 14
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posted August 31, 2012 07:31 AM
Thanks for replies, any other ideas gladly accepted.
I've had the bike for two months and lived with just the midrange, my last bike was much slower anyway (kz650, 79)
The filters are all fresh, I have yet to change the plugs.
I'll keep this current as I troubleshoot.
Thanks, Pat
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bikerdude0_2
Parking Attendant
The Dude
Posts: 5
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posted August 31, 2012 11:53 AM
Fuel pump on its way out is also a possibility.
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cincykz
Parking Attendant
Posts: 14
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posted September 01, 2012 07:43 AM
Quick question: What is this?
It sits atop all of the other wiring and connectors on the left of the bike near the tps, and I can't find anything like it in my shop manual. Thanks, Pat
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cincykz
Parking Attendant
Posts: 14
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posted September 01, 2012 07:48 AM
can't seem to attatch picture, It is a black piece with three outlets that look like they could have hoses attatched to them (about 1/2"), and one white plug into it, the wires go back under the rubber blanket on top of the engine.
on the black part in question is stamped in white: 475
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Shane661
Needs a life
Posts: 11494
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posted September 01, 2012 04:13 PM
What is your oil level in the sight glass?
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cincykz
Parking Attendant
Posts: 14
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posted September 02, 2012 11:47 AM
Oil is halfway up the glass, ur just under that point (with bike level and cold)
While digging through the bike I found what must have had a significant impact:
The left and right side intake ducts between the air scoop and the airbox were reversed, so there wasn't even kind of a seal. The left one was completely off on the bottom. ( blame the p.o., not me)
I corrected this and rode about a hundred miles today. At first the bike backfired several times. I got a can of seafoam and ran a tank of treated gas through, and it seems to be improving.
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cincykz
Parking Attendant
Posts: 14
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posted September 03, 2012 08:12 AM
Rode another hundred miles today, many of them winding through the twisties at pretty high revs. The air ducts weren't the magic fix i had hoped for, though. I noticed something when winding it out on a straight in fourth: At about 9-9.5k, my motor stops accelerating at wot, but when i backed off a little, it seemed to grab another 500 or so revs. Would that further point to the tps?
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cincykz
Parking Attendant
Posts: 14
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posted September 03, 2012 08:23 AM
Ronayers.com fiche shows my bike with 2 tps, same part number but the second one followed by an A.
On the bike one is black w/ black connector, one is grey w/ grey connector.
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tuusinii
Pro
Posts: 1031
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posted September 03, 2012 09:50 PM
The other is for the throttle You turn by wrist. The other is for the ECU to control. The one that is closer to engine (lower) is the one Your wrist controls and I think it's the black one, but not sure. But I would first check the voltages so You would now it's broken. Are You sure You don't have any EFI error codes flashing?
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cincykz
Parking Attendant
Posts: 14
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posted September 04, 2012 09:03 AM
I will check the voltage today, thanks for the good info.
The error codes show as the fi light (red) flashing in specific patterns, right?
My fi light comes on when i start the bike and goes off immediately afterward.
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cincykz
Parking Attendant
Posts: 14
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posted September 04, 2012 09:07 AM
tuusinii (or anyone else), I want to test the sensors, what is the procedure? Am i testing for running voltage or removing it and testing resistance?
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tuusinii
Pro
Posts: 1031
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posted September 05, 2012 04:37 AM
You can do both. First You have to measure voltage between 2 of the three wires going to sensor. You have right wires when the voltage starts about 1V and goes to about 4,5V. Then You can also check the resistance when not connected. Get a service manual or look for copy on internet. There is the actual procedure and can also give more information. I remember reading that the other TPS (the one ECU is controlling) the voltages are different, but not sure. On older models the TPS should be 1.075V when idling at 1000RPM and about 4,2-4,5V when full throttle. On the later it may be different.
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cincykz
Parking Attendant
Posts: 14
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posted September 10, 2012 04:53 PM
Had backlogged error code of 1. bad tps, 2. bad iap, 3. bad water temp
Getting everything tested with the kawasaki harnesses tomorrow, will keep you posted.
Thanks everyone for all the information and help, much appreciated
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tuusinii
Pro
Posts: 1031
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posted September 11, 2012 02:42 AM
Good that You found something. Hope You get it figured out.
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cincykz
Parking Attendant
Posts: 14
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posted September 20, 2012 03:44 PM
tps comes in tomorrow, cross your fingers everybody
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cincykz
Parking Attendant
Posts: 14
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posted September 25, 2012 11:45 AM
The main throttle sensor was fried.
Replaced, the bike is truly a monster.
Thanks for your help guys.
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