Question about 2002 kawasaki KMX 125

1 Answer

Kmx 125 engine knocking

Hi, i ran out of oil the other day(2 stroke) the bike died, filled it up after walking it 10 miles home, it started but would die down and not tick over just cut out, thought it would be the rings so i bought a new set and piston but it still does the same but with a knocking noise and seems to have little compression there. also i had it re-sleeved 9 months ago and there is no damage to the bore.
can any one help?
Thanks

Posted by on

  • 4 more comments 
  • mrchlorine Jan 29, 2009

    Hi, thanks for advice. I have checked piston to cylinder clearance and all appears fine as the new piston is 0.5mm oversized its a better fit than one I took out as that was standard with oversized rings. The rod has no up/down movement and shining a torch down into bottom end there are no signs that those bearings have gone and nothing in there that shouldn't be. Obviously I would have to crack it open to check other bearings but surly it wouldn't start if they have failed. So I put it all back together and started it again and the knocking is still there and still not tick over, the only way to describe it would be, it sounds like some thing is rattling about in the cylinder (piston but i cant see that myself) as its brand spanking new. small end bearings look ok and in tack. So I dont know and am short of money so cant take to garage. Anymore Ideas?

    Cheers

  • mrchlorine Jan 30, 2009

    rebored because cylinder was in a bad way, with deep scores and a chunk out of it, been fine since it was done then with running out of oil, the knocking started and with new rings and piston its exactly the same, on inspection i see no damage and a friend says theres none(more experienced than me) but hes stumped too. Piston pin bearing looks ok and all there with normal movement. Is it possible that its worn out and rattling about, but dont get the compression loss! the noise is definitely coming from top end somewhere. I know that lack of lubbrication is BAD, what sort of damage is it likely to cause?

    Hope this helps to help me. Thanks again or your time on this matter.

  • mrchlorine Jan 30, 2009

    sorry you did say could have ruined any bearings. any idea of which ones and how could i tell without cracking it open as i will have to get gasket set and seals just to look. I will prob have to crack open anyway so spose i'll have no choice.

    Thanks again

  • mrchlorine Jan 30, 2009

    Hi thanks again, will get on and do that tomorrow as have had other things on today. Will let you know how I get on.

  • mrchlorine Feb 12, 2009

    Hi, had a lot of snow lately so not been able to work on bike.

    I bought a new cylinder and piston as was cheaper than re-bore and its running absolutly perfect now. Cheers

  • dstar2kuk Apr 10, 2009

    I had the same issue, the oil ran low but didn't run out, the top end started to make a ringing knocking sound and there was increased vibrations felt through the footpegs, I went to the garage 3 times and was told it was just a top end rattle and nothing to worry about, after 2 days of comuting to work with the noise getting worse the engine on low revs started to give a scraping sound, there was no loss of compression and on high revs the bike moved.... I went back to the garage and was told again its just top end rattle! Can anyone shed any light on top end rattle as it felt like the enging was seazing!

×

Ad

1 Answer

  • Level 1:

    An expert who has achieved level 1.

    Hot-Shot:

    An expert who has answered 20 questions.

    Corporal:

    An expert that hasĀ over 10 points.

    Mayor:

    An expert whose answer gotĀ voted for 2 times.

  • Contributor
  • 36 Answers

Check the piston to cylinder clearance.You very well could have wore either the piston and/or the cylinder.
Also check the rod for up/down play.Running out of oil could have ruined any bearing in the motor.

Posted on Jan 29, 2009

  • Brad Hurt
    Brad Hurt Jan 29, 2009

    Did you rebore with the oversize piston?How is the piston pin bearing?

  • Brad Hurt
    Brad Hurt Jan 30, 2009

    Before splitting the cases recheck the piston to cylinder clearance with a gauge and take the piston pin and bearing out and mic the pin and check the roller bearings out close.
    That and the rod bearing are most likely to be worn.


×

Ad

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya Mechanic can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repair professionals here in the US.
click here to Talk to a Mechanic (only for users in the US for now) and get all the help you need.
Goodluck!

Posted on Jan 02, 2017

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

2 Answers

Why does my 93 Honda Accord run fine and then dies going down the road and will start again and die again?


There is a black fuel relay way up under the top left driver side dash that breaks its main wire solder connections on the circuit board under over-heat conditions. Resolder that relay. Starting fluid will show that you have lost fuel delivery under no start conditions. You can use the breather hose from the valve cover for this test.

May 12, 2014 | 1993 Honda Accord

1 Answer

Temp gauge shoots up and wont start


Hi Anonymous, for this situation I would call my local dealer or reputable shop's service/parts department and inquire about any possible quick fix/test or parts inquiry. If necessary transport your vehicle to the dealer or shop and have a professional technician take it for a test drive, if it is in running condition, and give you a written estimate of repairs and answer any specific questions you may have about your issue. For more information about your issue please visit the website below. Good luck and have a nice day. DOWNLOAD 2002 Aprilia Rs 125

Nov 08, 2013 | 2002 Aprilia RS 125

1 Answer

2000 chevy silverado, runs for a while then dies and will not restart


Hi Beverly, I believe you may have a problem with the fuel filter or fuel pump. Regards John

Jul 03, 2012 | 2000 Chevrolet Silverado

2 Answers

Just turns off on it's own, Wait 60 sec. restart press pedel it dies.


This engine is electronically controlled so the first thing that must be done here is to have the systems control computer tested for fault codes and then do the proper diagnostics based on those codes.

Jun 07, 2012 | 1995 Plymouth Voyager

1 Answer

2004 yz450f will not kick start?


FYI to tombones49, you suggested a 32/1 gas oil mix, this bike, however, is a 4 stroke, thus rrequiring no such mixture. Maybe some sleep woulde wise...

Mar 12, 2012 | 2004 Yamaha YZ 450 F

2 Answers

2001 nomad, has power commander, vance and hinse exhaust and hyper charger. Bike starts but miss fires. Bike seems to run better uphill then down hill. It started on day on a ride when the bike just died...


DRAIN CARBS FROM PETCOCK AT BOTTOM OF EACH CARB MAKE SURE FUEL DRAINS COMPLETELY THEN TURN FUEL BACK ON, IF THIS IS AN INJECTED MODEL DRAIN TANK AND FLUSH THEN RUN IT HARD FOR 20 MILES OR SO, MAKE SURE YOUR OIL LEVEL IS OK

Oct 04, 2009 | 2001 kawasaki VN 1500 Vulcan Classic...

1 Answer

My yz wont start, changed spark plug it ran for 1/2hr then died


Couple things- 1. If the plug was dirty after 1/2 hour you have either the wrong heat range plug(too cold) or 2. a fuel/carb issue. Buy a hotter NGK plug, ask for help the numbers don't always make sense. Use only full synthetic 2 stroke (I always liked bel-ray) and fresh 93 octane fuel. When you find a plug that works good buy a case of them, 2 stokes will foul plugs period. And some advice with your solution, never head into the woods without a spare plug, they will foul at the absolute worst time.

Don't forget to rate please!

Mar 13, 2009 | Spark Plugs BR4HS Plug 10/BX #3322

Not finding what you are looking for?
2002 kawasaki KMX 125 Logo

807 people viewed this question

Ask a Question

Usually answered in minutes!

Top kawasaki Experts

Arnie Burke
Arnie Burke

Level 3 Expert

4536 Answers

yadayada
yadayada

Level 3 Expert

77201 Answers

bazzz7071
bazzz7071

Level 2 Expert

342 Answers

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

Answer questions

Manuals & User Guides

Loading...