Question about 1999 Yamaha YZF 600 R thunder cat

2 Answers

Power Loss at around 3000 rpm

My Bike has started to lose power at around 3000 rpm, this only happens when in gear and under load. As it reaches 3000rpm the revs very slowly build still. I have checked the pick up coil resistance and Ignition coil resistance all are ok. No fuel lines are trapped. Recently I have replaced fork springs/oil and had the front end off for access. The problem only started when I put the bike back together.

Yamaha Thundercat yzf 600 r. 1998

Posted by on

  • 1 more comment 
  • jkpfamily Feb 25, 2009

    I have the same problem with the power dropping off at 3grand til 5 then the power is explosive from 5.5 to 10k. Will gummout work if its run through the gas tank? If not what is the best proceedure?



    Thanx Jerry p

  • bike service engineer Feb 25, 2013

    Weak spark plug.......check with another spark plug.if the probelm cleared.replace the spark plug..

  • joshua david gore Oct 09, 2013

    my bike was doing something similar but i had to re adjust the air fuel mixture screw . almost got it.

×

2 Answers

  • Level 1:

    An expert who has achieved level 1.

    Corporal:

    An expert that has over 10 points.

    Mayor:

    An expert whose answer got voted for 2 times.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 11 Answers

Weak spark plug.......check with another spark plug.if the probelm cleared.replace the spark plug....

Posted on Feb 25, 2013

  • Level 1:

    An expert who has achieved level 1.

    Corporal:

    An expert that has over 10 points.

    Mayor:

    An expert whose answer got voted for 2 times.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 6 Answers

Are the carbs balanced correctly and are you sure that all of the jets are clean. if not try it, it might work. sluggish throttle response is normally to do with the carbs.

Posted on Jan 01, 2009

  • andybarr1 Jan 01, 2009

    are the carbs balanced correctly and are you sure that all of the jets are clean. if not try it, it might work. sluggish throttle response is normally to do with the carbs.

×

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

2 Answers

1986 Goldwing 1200,at around 3000 rpm when under load or give throttle the rpms jump to 5000 or higher, no power to drivetrain, then catches, RPM drops and its OK


Hi, Derek sounds like your clutch is starting to slip 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 Honda, 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.
Clutch Adjustment GL1200
Goldwing Clutch Bleeding Tip
Changing Your Motorcycles Clutch
http://www.moto4.ru/manuals/honda_gl1200/Honda_GL1200_Goldwing%201984-1887_Service_Manual.pdf

Jun 20, 2016 | Power Motorcycles

1 Answer

1979 xls sportster. At about 3000 to 3500 bike begins to lose power and back fires. Not sure why. Any suggestions?


It sounds like ignition to me. Most likely coil or stater. I would start with the coil.

Jan 08, 2015 | GAS Motorcycles

1 Answer

Motorcycle loses power and just revs when accelerating


the problem is not your tuning, it is your clutch. Motorcycle clutches are maintained as light as possible to stop heavy pressure on your fingers. often when you increase hp, you must increase your spring pressure on your clutch plates so the first thing is to adjust your clutch, if it is too tight it will slip under load (more load = more slip). second,clutches do wear out so if adjusting does not work you will have to inspect your clutch plates for wear and may even have to increase your spring pressure, this is a big job and you will need special gear to do it

Nov 25, 2013 | 2013 kawasaki Concours 14 ABS

1 Answer

2008 Ducati 1098s loss of power


check throttle cable and all wiring
by the way im 11 yrs

Jun 23, 2013 | 2008 Ducati 1098 S

2 Answers

Loss of power at the end of each gear


If it continues to rev, it is probably not a carb problem.
I assume is has a wet clutch:ie the clutch runs in the engine oil.

Try an oil change, use a four stroke motorcycle engine oil,
Car oils have friction modifiers in them that can cause clutch slip.
and sometimes the expensive synthetic oils are just too slippery.
So try for a mineral oil, the bike shop will help you choose.

Jun 28, 2010 | 2002 Honda VT 750 CD Shadow A.C.E. Deluxe

1 Answer

1988 Honda CBR 1000F No power beyond 3rd gear


If your rpms are going up to 7000 but your not moving your clutch is probally about to go out. Just make sure your clutch cable is not binding or stuck.

Jul 28, 2009 | 1988 Honda CBR 1000 F

1 Answer

On two seperate occassions, my 1988 HD FXRS seemed to lose power suddenly on the freeway - It went from 70 mph to 15 mph without shifting down from fifth. I attempted shifting through all gears but nothing...


The latter part sounds like insufficient play on the clutch lever--the clutch seems to be slipping. Sudden power loss is usually linked to the ignition system. Have you checked the lube level in the transmission? You could be having a bearing seizure if the lube is low.

Jul 18, 2009 | 2000 Harley Davidson FXDL Dyna Low Rider

1 Answer

Loss of power above 3000 rpm


You have a fuel delivery problem. Open the gas cap on the bike & try. This will prove if a vacuum is happening inside the tank (plugged vent). Check fuel filter. Check fuel pump. Check fuel pressure regulator.

May 14, 2009 | 2003 Ducati ST4S

1 Answer

Loss of power


Clutch slippage would be a possibility. While rolling in 5th gear mid-range in the rpm band give the bike a lot of throttle. Do the rpms rise significantly without the speed of the bike increasing? If so you may need a new clutch or possibly just new springs. If you have put any oil additive it is possible your clutch friction plate(s) became contaminated.

Jan 03, 2009 | 2000 Honda NSR 125

Not finding what you are looking for?
1999 Yamaha YZF 600 R thunder cat Logo

562 people viewed this question

Ask a Question

Usually answered in minutes!

Top Yamaha Experts

Steve Sweetleaf
Steve Sweetleaf

Level 3 Expert

1128 Answers

D. E. Hev

Level 3 Expert

1059 Answers

mikeuk

Level 2 Expert

61 Answers

Are you a Yamaha Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...