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Got my kx 125 back from the shop Had them rebuild the top end and it sounds like **** exeped when in netral and has hardly any tork whats wrong

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  • Motorcycles Master
  • 8,404 Answers

Take it back - have them repair it. If you mess with it, they will blame the trouble on you.

Posted on May 21, 2013

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Posted on Jan 02, 2017

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SOURCE: Ive just done a top end rebuild on my CRF250R how

The biggest thing with a rebuild is getting the piston rings seated. Check your oil before every ride to make sure it's where it's supposed to be. Ride easy for a bit to get it warmed up, then feel free to ride it normally. Ride it up and down some hills. Putting a load on the motor and the up and down revving is actually good for seating the rings.

Posted on Dec 02, 2010

  • 139 Answers

SOURCE: honda cr 125 new top end rebuild started ok but

sounds like the float in the carb is stuck or set to the wrong hight give the carb a few taps with a screwdriver if that dont work take the carb off and check the float and needle.

Posted on Oct 08, 2009

tabbycat282
  • 56 Answers

SOURCE: MY KFX 80 HAS 65 PSI COMPRESSION AFTER TOP END

You may have a problem with your reeds.If you have done a rebuild because something internally has destroyed itself then the chances of those loose metal fragments chipping or cracking a reed are quite high.Pull the reed block and check it out and replace if neccesary.Other than that i can only presume a problem with the rebuild.hope i've given you some direction Armstrong.....Good luck with it .

Posted on Dec 06, 2009

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1 Answer

No compression when kick starting kx 125


Sounds like it's time for a top end rebuild. Replace the piston and ring.

Oct 25, 2013 | Motorcycles

1 Answer

I have a 2004 kawasaki kx 125 the top end needs to be rebuilt it has been rebuilt one time already so what parts would i need to get is it hard to do or what


piston kit, wrist pin bearing, top end gasket kit and a honing tool to clean your cylinder is about it I would probably buy new air filter and spark plug if I was doing it, but not essential ?

Jan 18, 2011 | 2003 kawasaki KX 125

1 Answer

What color piston does a stock 2004 yz 125 come with?? Im rebuilding my top end but theres different color oem pistons? whats the difference???


Hi, Mezacarlos for this situation I would call my local dealer or reputable shop's service/parts department and inquire about any possible quick fix, answers, or parts inquiry. 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.
yz125 top end rebuild help
YZ125 Top End OEM
YAMAHA YZ125 Owner Service Manual
OEM parts for Yamaha
http://mybikemanuals.com/yamaha/yamaha-yz-owners-manuals

Dec 18, 2010 | 2004 Yamaha YZ 125

1 Answer

My son rides a 2003 125 kx,but his front suspension is so hard its a ruf ride. i did see oil on the one shock so do u think i need seals or complete rebuild? i did adjust the the front end all the way to...


It just need new oil seals, but make sure that you don't put to much oil
back in, or it will be very hard and could blow the seals again,
hope this helps

Nov 27, 2010 | 2003 kawasaki KX 125

2 Answers

MY KFX 80 HAS 65 PSI COMPRESSION AFTER TOP END REBUILD VERY HARD STARTING


You may have a problem with your reeds.If you have done a rebuild because something internally has destroyed itself then the chances of those loose metal fragments chipping or cracking a reed are quite high.Pull the reed block and check it out and replace if neccesary.Other than that i can only presume a problem with the rebuild.hope i've given you some direction Armstrong.....Good luck with it .

Dec 06, 2009 | 2003 kawasaki KX 125

1 Answer

How do i rebuild my 2002 Kawakaki KX 125


You need to get a service manual for your model and read it my friend.

Oct 23, 2009 | kawasaki KX 125 Motorcycles

1 Answer

How to change kx 125 2005 piston


You will have to remove the head and cyclinder to do this. You will need a manual on top end rebuilds for you bike.

Sep 28, 2009 | 2005 kawasaki KX 125

1 Answer

My kx 125 1998will not start..i just bought the bike yesterday an the guy said it had a crankshaft seizure he rebuilt the top end suposively but he said he didnt have the right tool to replace the...


Just find yourself another motor, or send yours off to be rebuilt. Depending upon where you live will be how hard it is to find someone to rebuild the crank. If you can buy the whole crank assembly with the rod already on it, you may be able to get by with it.

Jul 15, 2009 | 2003 kawasaki KX 125

1 Answer

I have a kx 125 1992 model and i cant select neutral. i had to rebuild the engine last week and ive been told ive put the gearbox back together wrong, what do i do ?


The easiest fix to try is to replace the two springs on the shift mechanism. The stopper wheel spring is the most important. It is what indexes the shift drum position.

A “very helpful” rating for this answer? Thanks!

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Jun 24, 2009 | 2003 kawasaki KX 125

3 Answers

Top speed


no you **** going bigger in the back is more accel, smaller is more top end. a 48-46 would put you somewhere between 80-100 mph depending on the engine but result is **** low end. If your kx is 6 spd you would benefit from going up a tooth or 2 for lowend because it has topend already.

Nov 10, 2008 | 2007 kawasaki KX 125

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