Question about 1991 kawasaki Zephyr 750

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My Zeph an imported bike will not rev above 7000 rpm Would it be restricted?

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If the bike came from the UK then most likely the power was limited, its usually just a throttle stop, look down where the cables hook up.

Posted on May 02, 2010

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Posted on Jan 02, 2017

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2011 Laro that is lucky to do 60-65 km. I've had the carby fully serviced, new plugs, new ODI switch, coils and it still doesn't go any faster than 60 km flat out revs at 3000 rpm and that's it.


Hi, Bungi if it's not electrical, ignition or cam timing, or a compression issue then all that's left is fuel and the usual suspects are:
1. Idle speed improperly adjusted.
2. Inlet system air leak.
3. Damaged or restricted fuel tank venting system.
4. Dirty or damaged air cleaner element.
5. The accelerator pump is inoperative.
6. Vacuum piston assembly malfunction.
7. Enrichener valve is not seated or leaking.
8. Restricted fuel supply tract.
9. Plugged bowl vent.
10. Loose or plugged fuel and air jets or passages.
11. Improper float level.
12. Worn or damaged needle or needle jet.
13. Loose or plugged main jets or passages.
For more information about your issue please click on the blue links below. Good luck and have a wonderful day.
Help diagnose my bike Won rev past 3000rpm motorcycles
Wouldn rev above 3k rpm now won start
Bike doesnt rev past 4 5k rpm
Life On 2 Wheels
http://www.cycletorque.com.au/laro-cruiser

Mar 15, 2017 | Motorcycles

1 Answer

I have a 1986 yamaha virago 1100..when I first start the bike and put it into gear it dies out...when I rev it to 7000 rpm it goes into gear and is fine for the day until the next day


Hi, Floyd and the usual suspects are:
1. Idle circuit and transfer ports clogged.
2. Air fuel mixture adjustment too lean.
3. Pilot jet clogged.
4. Faulty accelerator pump.
5. Float level too low.
6. Float bowl contaminated old fuel, water, dirt, rust, etc.
7. Float bowl vent or overflow tube clogged.
8. Fuel flow to carburetor restricted.
9. Intake manifold leak.
For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have nice a day.
Re dies when put in gear Road Star Forum Yamaha Road Star
Engine dies when put into Gear
Stalls when put in first gear
Yamaha 1986 XV1000 Service Manual

Aug 04, 2016 | Yamaha Motorcycles

1 Answer

My tzr 3ma wont rev over 7000 rpm


Hi, Kevin and the usual suspects are:
1. Severely drained or faulty battery.
2. Faulty regulator/rectifier or high output coil.
3. Faulty power valve, solenoid or installation.
4. Clogged air filter or exhaust.
5. Cracked or incorrect float level.
6. Float needle is not seating.
7. Faulty reed valve.
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.
bike will not rev past 8k like hitting the rev limiter
07 rev won rev over 7000 RPM
Yamaha TZR250 1987 Service Manual
OEM parts for Yamaha
http://mybikemanuals.com/yamaha/yamaha-tz-owners-manuals

Sep 05, 2012 | Yamaha TZR 250 Motorcycles

1 Answer

My GSXR 750 J runs extreemly rough between 7000 and 9000 rpm. Its a mildly tuned engine with after market cams, a dynojet kit and I recently installed some inline fuel filters. The bike runs perfectly...


I would check and adjust the static ignition timing as if too far retarded it will tend to misfire at mid range revs. and suffer from lack of power at the top end.

Mar 01, 2011 | 1988 Suzuki GSX-R 750 J

2 Answers

The rev counter goes from 0 to 7000 revs then back to 0


that is the indication of the exup valve malfunctioning. it tosses the code of 7000 rpm for a few seconds on start up to let you have an indication that there is a problem.

Mar 29, 2010 | 2000 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

1 Answer

954 fireblade splutters at 7000 rpm


1ST of all i think you should take your bike to another dealer to get it fixed as they should be able / confident mechanics to repair any problem.
But anyway have you checked the throttle position sensor ? of the fuel injector connections ?
just that water could of coroded the connectors.

Jun 21, 2009 | 2003 Honda CBR 954 RR Fireblade

2 Answers

Bike has no power up to 7000 rpm


check your gear ratio ie chain and sprokets if thay are to high of a ratio this will happen . as these bikes dont start to make power untill thay rev up hight . thay are tuned for top end revs and speed

May 31, 2009 | 1990 Suzuki RGV 250 L

2 Answers

Error code,


The needle jumoing to 7,000 on the RPM dial means that the EXUP valve is stuck. This is a common problem with Fazer 1000's. Although Yamaha don't recommend any maintenence I strip and clean mine regularly to stop it from sticking. According to Yamaha - a sticking valve is not a serious problem and the bike can be ridden until you get time to fix it.

Jan 26, 2009 | 2005 Yamaha FZS 1000 Fazer

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