Question about 1997 Yamaha YZF Thunder ace 1000 R

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1997 Yamaha YZF Thunder ace 1000 R EXUP valve not working

Exup valve not working when you switch on but removed fuel tank and when you move wiring harness to servo it works faulty servo?

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  • Yamaha Master
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Hi, Rosiemowatt1 either that or a wiring issue for this scenario you will need your service/owners manual if you can't find the first and best tool you ever bought for your Yamaha, despair not, for a mere zero $0 you can download another one. For more information about your issue and valuable "Free" downloads that you will need please click on the blue links below. Good luck and have a wonderful day.
Exup adjustment on the Thunderace replacement of cables and lubricating...
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Posted on May 23, 2017

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Posted on Jan 02, 2017

  • 7 Answers

SOURCE: exup valve location

Hi I believe the valve itself is in the exhaust,mid section where pulley controls are,hope this is helpful :)

Posted on Dec 08, 2009

emissionwiz
  • 74945 Answers

SOURCE: wher can i get exup ehaust servo cables from.they

Try Dennis Kirk, they are on the web

Posted on Dec 06, 2011

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1 Answer

2000 r1 exup valve


Hi, Anonymous for this scenario you will need your service/owners manual if you can't find the first and best tool you ever bought for your Yamaha, despair not, for a mere $0 you can download another one. For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have a nice day.
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http://mybikemanuals.com/yamaha/yamaha-yz-owners-manuals

May 23, 2014 | 2000 Yamaha YZF-R1

1 Answer

Thunderace rev counter goes up to 3000rpm and back to0rpm


Mine is a Yamaha YZF1000 1996
Taco code 3 fault is related to the TPS Sensor located on the RHS outter carburettor.
Taco code 7 is related to the EXup valve issue's loose/damaged
Taco code 9 relates to the fuel level sensor & the cable under the tank unplugged.
Also see visor down site

Oct 02, 2011 | 1996 Yamaha YZF Thunder ace 1000 R

1 Answer

Struggles at low revs with a thuding power input which clears at higher revs still achives top speeds has new exup valve fitted new plugs and caps, coils primary and secondary windings checked good spark...


If it were carburetted one would say it was bogging down at low revs and this would be caused by the mixture being too rich.
But being an FI bike I presume, then best bet is to have a dealer or good bike mechanic check for fault codes before you start looking for and fixing things that might not need fixing.

Sep 14, 2011 | 1997 Yamaha YZF Thunder ace 1000 R

3 Answers

Yamaha fzr 1000 exup, flat spot and then holdin back till 4000rpm. Any solutions...?


Hi,,,sounds like you have a blockage in the carbs,,,remove and clean carbs,,check spark plugs too.

Mar 22, 2011 | 1991 Yamaha FZR 1000

1 Answer

Thunderace cuts out over 6000rpm. Exup cable snapped so have jammed the exup valve open..


Hi, Davidporoniu and the usual suspects are:
1. Severely discharged or a damaged battery must have 12.5 volts or more and be able to pass a proper "LOAD" test if necessary, you may have a preliminary reading of 12.5 volts or more but little or zero amperage the battery is faulty and must be replaced, AGM batteries fail in this scenario more so than lead acid batteries.
2. Faulty alternator/generator and or voltage regulator.
3. Loose or corroded battery terminals and or cables especially the "NEGATIVE" cable, look for loose, corroded, or broken connectors inside the cable harness at "BOTH" ends.
4. Faulty main circuit breaker or ignition switch, check for loose connections and continuity.
5. Faulty system and or ignition relay, check for continuity.
6. Faulty ignition coil, ignition/electronic module.
7. Faulty CKP, CPS, CMP, MAP, TPS, or BAS sensor, corroded, loose or broken wire connector pins/sockets.
8. Throttle cables and or idle speed improperly adjusted hot idle speed should be 950 RPM to 1000 RPM.
9. Faulty neutral, side stand or clutch lever safety switch.
10. Fuel tank empty
11. Fuel tank contaminated with ethanol sludge.
12. Water or dirt in the fuel system, or clogged filter.
13. Restricted, blocked or kinked fuel line.
14. Faulty fuel pump.
15. Faulty pressure regulator.
16. Faulty or clogged fuel injectors.
17. Lean angle switch is faulty or needs adjustment.
For more information about your issue and valuable "FREE" downloads that you need please click on the blue links below and for more specific information or questions at no charge please feel free to contact me at xlch@mail.com. Good luck and have a wonderful day.
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Apr 30, 2010 | 1997 Yamaha YZF Thunder ace 1000 R

2 Answers

I'm having a problem with my yamaha yzf1000 thunderace when riding it, the rev counter is switching from the revs I am doing up to 7000, down to 4000 and back to zero, then to normal revs and repeating. I...


This is a diagnostic code telling you there is a problem with the exup valve and/or servo, cables etc. Take the little cover off the exup valve and check the pulley is rotating about 1/3rd of a turn when the revs hit more than 4000 revs. It might be partially seized or a broken cable or problems with the servo. The mechanical bits are easy to fix.

Feb 18, 2010 | 1997 Yamaha YZF Thunder ace 1000 R

1 Answer

I have a thunderace and the rev counter keeps jumping from 0 t0 7000 revs


7000 rpm is a self diagnostic code that either your exup valve is not being detected or the valve is locked up and not moving. If you put a header on your bike and took over the exup valve servo motor, you are going to have to put it back on. It also changes the mapping of the ECU and will not let it rev to redline when the Exup servo motor is missing.

Oct 06, 2009 | 1997 Yamaha YZF Thunder ace 1000 R

3 Answers

1997 Yamaha YZF Thunderace uses 1/2 quart of oil every 200 miles


Replace standard rings with GTS1000 rings . I had Fzr1000 with same problem , at 187000 kms I pulled the barrels off and found no hone left , it was a smooth bore . Also replaced valve guide seals at this time also . Oil consumption dropped from 1 litre per 1000kms to 1 litre per 8000kms. Bike has now done 308000kms and still uses oil at the rate of 1 litre per 4000kms .

Aug 11, 2009 | 1997 Yamaha YZF Thunder ace 1000 R

4 Answers

Yamaha 2001 r1 been stood for 2 yrs ;got back on road ;rev needle keeps going from 0 rpm~~7000rpm all the time;bikes runs but must of lost half the power of the bike ????


Hi There,
Got this from my copy of the Yamaha workshop manual for this model

The YZF-R1 features a self-diagnosing system for the following circuits:
1. throttle position sensor
2. EXUP
3. fuel level indicator light
if any of these circuits are defective their respective condition codes will be displayed on the tachometer when the main switch is set to "ON" (irrespective of whether the engine is running or not)

1. throttle position sensor a) Disconnected b) Short-circuit c) Locked 0 - 3,000rpm
2. EXUP a) Improper connection b) Short-circuit c) Servomotor is locked 0 - 7,000rpm
3. Fuel level indicator light a) Improper connection 0 - 8,000rpm

It looks like you have a problem with the EXUP Valve on yours, probably seized or maybe cables not moving freely
Hope this Helps

Apr 25, 2009 | 2001 Yamaha YZF-R1

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