Question about 1997 Yamaha YZF Thunder ace 1000 R

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

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  • Yamaha Master
  • 41,796 Answers

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.
YZF750 1040 Thunderace
Bikes cutting out at High RPM
Yamaha YZF1000RJ Service Manual
OEM parts for Yamaha
YAMAHA YZF1000R Owner Manual

Posted on Jun 10, 2017

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6 Suggested Answers

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Posted on Jan 02, 2017

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polarcycle
  • 1392 Answers

SOURCE: yzf 750 wont rev past 4000 rpm

Sounds like you need some plugs and the carbs cleaned and synchronized.

Posted on Jun 10, 2009

  • 13 Answers

SOURCE: my thunderace is I think my bike is only firing on

Tight valve clearances will give this problem get he top end reshiimmed by an expert or dealer.

Posted on Jul 28, 2009

  • 101 Answers

SOURCE: could you please tell me if a thunderace engine

It is NOT a direct bolt in by any means. If you have enough time money and talent, anything can be made to fit but if you are looking for something to bolt up and go, that is NOT it. TOTALLY different cases.

Posted on Nov 06, 2009

Testimonial: "thanks very helpful"

  • 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

  • 18 Answers

SOURCE: exup cable replacement on a fazer 1000

there is two cables which connect to a servo at the top ,the bottom fits to a ex up valve in the downpipe ,undo the cover on the exhaust down pipe and unclip the cabe ends,you will have to loosen the ajustment nuts to be able to unclip them,

Posted on Jul 15, 2010

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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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My Yamaha r1 1998 rev counter goes back to 0 when the throtle is open to the max, but back it up a bit and it goes back to where it should indicate. The bike is running normal, even if the tachometer goes...


it is your exup valve it may be sticking or a cable has snapped it does it a lot on r1s it has 3 fault codes rev needle goes to 7 for exup valve 3 for some thing eles and 4 for another fault

Aug 15, 2012 | 1999 Yamaha YZF-R1

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

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HI THE SELF DIAGNOSIS ON MY R6 2006 AS COME UP WITH ERROR CODE 18 COULD YOU TELL ME WHAT THIS CHEERS STU


Your EXUP is the butterfly / valve that is in-line between your center muffler/Cat and the stock exhaust can. It is controlled by cables from a servo motor under the tail / behind the rear shock.

The EXUP errors (17 and 18) are because:

1. you removed your EXUP servo and/or valve when you installed your exhaust.

2. your EXUP valve is stuck / cables are seized up

3. your wiring harness is disconnected from the servo motor.

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1997 Yamaha YZF Thunder ace 1000 R EXUP valve not working


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.
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Apr 06, 2011 | 1997 Yamaha YZF Thunder ace 1000 R

1 Answer

1995 Yamaha FZR 1000 removed power valve she run fine when she got hot misfire started again and doesnt want to tickover then dies


Hi, Davelea1pres put the power valve back in it's there for a reson and the usual suspects are:
1. Idle speed improperly adjusted.
2. Inlet system air leak.
3. Leaking accelerator pump.
4. Loose low-speed jet.
5. Plugged low-speed jet.
6. Contaminated or plugged low-speed circuit.
7. Enrichner valve is not seated or leaking.
For more information about your issue and valuable "FREE" downloads that you will need please visit the websites below. Good luck and have nice a day.
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https://www.tradebit.com/filedetail.php/243740163-1989-1995-yamaha-fzr-1000-genesis-exup-fzr1000
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http://mybikemanuals.com/yamaha/yamaha-fz-owners-manuals

Mar 01, 2011 | 1995 Yamaha FZR 1000

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

2 Answers

Does anybody out there knows anything about R1's I'm having problems with code error 17, and Exup motor not working.... Is there a way maybe connecting the wires to the lil motor that control the intake...


If the code is coming up then your exup valve is probably stuck open or closed and needs to be removed and greased. when you turn the ignition on the bike will do a exup check and preform a cycle which is the noise you can hear so watch the valve cables and see if they move, if they dont then the exups deffinately stuck!

Jan 03, 2010 | 2006 Yamaha YZF-R1

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

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