Question about 2004 kawasaki KX 125

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My kx125 i put a piston in it not to long ago got least 6 times to ride it hard know the top end sound like its pinging and when i rev the bike it boggs and sound like a 4 stroke and sound like a car intake

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I had the same problem. sorry to say but its your piston again. have you been letting it warm up before riding. checked oil before and after every ride. if yes then when the new piston was fitted something wasnt done properly

Posted on Aug 24, 2010

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Posted on Jan 02, 2017

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Have a 2004 hd sporster roadster carb rejet kn filter python mufflers bike pings at high rpm around 3500-4500 other than that it runs great what could cause this ty


Hi, Michael to avoid premature engine wear and damage this condition should be eliminated "ASAP" and the usual suspects are:
1. Fuel octane rating too low.
2. Compression too high due to excessive carbon deposit buildup on top of the piston, top of the cylinder bore, and cylinder head dome.
3. Engine overheating due to lack of lubrication, coolant, or lack of cool air passing by top end cooling fins due to accessories or bike not moving.
4. Engine under heavy load due to riding double overweight luggage etc.
5. Fuel-air mixture too lean or too rich.
6. Outside air temperature too hot for the load (dessert).
7. Faulty knock sensor.
8. Electronic ignition timing too far advanced due to faulty sensor inputs (MAP, CKP, CMP)
9. Points plate too far advanced or mechanical advance mechanism worn out.
10. Blocked exhaust causing excessive backpressure.
11. Incorrect spark plugs for the kind of service causing overheated tip.
For more information about your issue and valuable "FREE" downloads that you will need please visit the websites below, and for specific information or questions, please feel free to contact me at xlch@mail.com. Good luck and have a nice day.
Harley Davidson Manuals Mark Workshop
http://www.stcharlesharleydavidson.com/OEMpartfinder.htm
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Mar 20, 2016 | 2004 Harley Davidson XL 1200 R Sporster...

1 Answer

Metal Grinding Noise coming from YZ250 motor


If its coming from the top end its definitely the ring/piston stop riding it if you keep riding it, it will mess up way more then top end if you cant do it your self take it to a shop asap

Jan 22, 2013 | Motorcycles

1 Answer

Have 1 2005 kx125 have about 6 hours on bike.


could be a jettng problem or a sign your rings are starting to wear out. have you noticed any loss in power? try running a compression test.

May 12, 2010 | 2003 kawasaki KX 125

1 Answer

06 kawasaki kx450f pinging


Hi
Sounds like a broken piston ring, & now its embedded itself into the piston & / or barrel
Remove exhaust pipe & shine a light up into barrel / piston to inspect !!

Ride safe
Bike-Doc
Please mark this as very helpful (if it has been!!) - it helps my ratings

May 09, 2010 | 2006 kawasaki KX 450 F

1 Answer

Have put a new piston kit in my 1993 kx125 dont have a kickstart and it wont bump start 4 some reason,theres fuel going through and there is a spark but a weak one will just a new plug get it going?


how long was your bike sitting for when you did the new piston? change the old fuel out the tank if the bike has been stood for along period of time the fuel may have gone off. have you installed the piston the correct way round?

Apr 23, 2010 | kawasaki Full Suspension Mountain Bike Men

2 Answers

Have 1 2005 kx125 have about 6 hours on bike.


Welcome to the world of 2-strokes. It is normal to have some oil residue build up each time it runs. You have to wipe them up frequently. You could have the dealer check to be sure the oil injector is set correctly but DO NOT attempt any adjustments of your own. Always use the highest quality 2-stroke oil you can afford. Enjoy riding like a bat-out-of-hell...

Mar 21, 2010 | 2003 kawasaki KX 125

1 Answer

Tapping sound on top end of engine


sounds like a piston noise, you may have a scoured cylinder, this is common on two strokes.

Aug 13, 2009 | 1979 Yamaha RD 250

2 Answers

Wr250f 2001.riding bike reved and stopped wont kik properly


if this is a two stroke,then if you have run it out of fuel,there is no lubrication for the piston and you may have damaged the piston or piston rings,check the compression,esay test is remove sprk plug pit your finger hard into the hole and crank the bike over,if your finger gets pushed off with loud crack sound then compression should be ok,but if it doesnt and the preesure is very weak then you will be looking at a top end rebuild,hope this helps

Jun 24, 2009 | 2003 Yamaha WR 250 F

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