20 Most Recent 2001 KTM SX 125 Questions & Answers


Hi, Anonymous for this scenario you will need your service manual, parts fiche, and owners manual if you can't find the best tool you ever bought for your KTM, despair not, for a mere zero $0 you can download another one.
For more information about your issue and valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
https://www.google.com/search?q=Secure+the+exhaust+system+2001+KTM+SX+125&tbm=isch&source=univ&sa=X&ved=2ahUKEwiB5r6b943jAhUliOAKHRKHDHkQsAR6BAgFEAE&biw=1440&bih=757
https://www.youtube.com/watch?v=Fz0O6vqLFVg
http://www.motogelnar.cz/manual/KTM/KTM125-200_1999-2003ServiceManual.pdf
https://www.partsfish.com/page/oem-parts-for-ktm
https://www.manualslib.com/manual/90431/Ktm-125-Sx.html

2001 KTM SX 125 | Answered on Jun 29, 2019


ITS THE CARB!!! -- take it to a qualified professional and have them clean and set the carburetor!! If you put the power valve in wrong, they can fix it too!!

2001 KTM SX 125 | Answered on Sep 20, 2017


Hi, Alex the best thing to do is take the engine to a profesional technician who has all the special tools and experience to give you a written estimate and possible warranty for more information about your question and valuable free downloads that you will need please visit the websites below. Good luck and have a nice day.
http://www.carlsalter.com/pdfs/KTM_125_200_sx_exc_service_manual.pdf
KTM fiche finder New Parts 125 SX Tyla Rattray spare parts for the KTM 125...
https://drive.google.com/file/d/0B2-8B_LViIend3JFUnVwQWVEWEU/view

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/gregg_c0ec1df182c7330e

2001 KTM SX 125 | Answered on Feb 24, 2016


A left crankcase half would probably be a problem even if you found one. The L and R center case on all bikes are matched sets. Slight differences in production can easily create a mis-match. It would be a bummer to purchase a Left case then find that a gear shaft binds up whenever the case screws are tightened. I have seen it many times. Your best bet is to find a used gearbox and either try to use it after checking the shifter prior to mounting in the frame. If it looks like the shifter has problems, put the guts of your old ****** into the new case. I would suggest that you use the output shaft from the new ****** since yours took a beating bad enough to crack the case. Selling for parts is a bad idea. Selling as a project bike is a much better idea. How about using it as a trade-in?

2001 KTM SX 125 | Answered on Aug 17, 2011


Thank you for contacting FixYa with your inquiry.
The following link will take you to a good source for your parts requirement:
http://cyclehuttktm.com/FicheFinderNew/FicheFinder.aspx
#1 52330000044 Superceeded Engine Case Cpl.w.tran.bear Look for Part Numbers 31007107001 50330000050.50330022000.503330 Another source: http://www.bikebandit.com/sem/ktm-parts?WT.mc_id=2676712&WT.srch=1
Or Motorcycle superstore: http://www.motorcycle-superstore.com/2/10/213/19924/PDEPT/Dirt-Bike-Motocross-Engine-Parts-2001-KTM-125-SX-Parts.aspx
Sometimes these people will be parting out a 125 SX: http://www.powersportswarehouse.com/fiche_select1.asp?cat=Motorcycles&mfg=KTM&gclid=CPb2ka7s0aoCFYjsKgodZQoh0Q
Hopes this helps you locate a case half. It's a pretty common bike and popular bike. There are a bunch of them out there, mostly in service.
Kind regards,
TF

2001 KTM SX 125 | Answered on Aug 15, 2011


a good weld shop can fix that with a price mind you. The best thing would be to replace it. you'll have to split the case to have it welded so why not just replace it. don't forget the seals and check the bearings.

2001 KTM SX 125 | Answered on Aug 15, 2011


dont put transmission oil in the motor! transmission oil goes in the transmission.. isnt there a dipstick?

2001 KTM SX 125 | Answered on Dec 12, 2009


buddy this is fine brilliant compression there ment to be from 100-185psi tops if below 100si bye to rings buddy

2001 KTM SX 125 | Answered on Dec 12, 2009


Is the igintion switch tight to spin 'on' with the key?
If so, use some graphite powder and a little WD40 to tht switch..

2001 KTM SX 125 | Answered on Nov 02, 2009


Google " service manuals ktm "
or try your local library. Often guys will donate manuals to the library. Also try www.repairmanuals.com See if the dealer can get you one.

2001 KTM SX 125 | Answered on Aug 09, 2009


Put it up on your stand lossen the axel and remove the bolt on the bottom of the shock. Then tighten your chain and lift your swingarm up until its horizontal with the ground, then the chain should have almost no play. Not completely tight, but almost no play. Tighten the axel, and the bolt on the shock, and your set,,,

2001 KTM SX 125 | Answered on May 16, 2009


Hi, Anonymous you may have hydraulic lock caused by excessive liquid in the cylinder or you have squeaked your top end this is commonly known as "HEAT SEIZE" the piston heats up expands and becomes extremely tight in the cylinder bore and usually occurs mainly on 2 cycle engines right after a fresh top end rebuild, but it can also happen to brand new motorcycles, these are rare instances due to better quality control and education. Overheating failures that cause pistons to seize are many and each one should be carefully diagnosed to prevent future repeat offenders and the usual suspects are:
1. Lack of lubrication due to low or no oil.
2. Among the causes of lack of cylinder, lubrication is clogging of lubricator by dirt or waste, obstruction in oil pipes/lines, leaky check valves, leaky pump packing, broken oil pipe/line, oil too cold to feed.
3. Wrong type of oil used in premix or oil tank.
4. Improper premix ratio you should start with 32:1 as a baseline.
5. New rebuild piston to cylinder tolerances set up too tight.
6. Failure to follow proper break in procedures with a 16:1 premix ratio.
7. Loose fasteners causing intake, base, or head gaskets to leak or blown crankshaft seal, failure caused by age, overheating or walking. 8. Holes in the intake manifold bent or warped intake flange or reed cage any stray air coming into a cylinder will cause a super lean condition.
9. Improper assembly of reed valve gaskets.
10. Insufficient warm up time for temperature conditions before wide open throttle.
11. Broken, pinched or cracked fuel line.
12. Carburetor fuel passages clogged or restricted from stale fuel varnish, ethanol sludge, dirt, rust, or fuel level in float bowl too low.
13. Main jet size too small or partially clogged
14. Air filter improperly installed, missing or not sealing.
15. Faulty or improperly adjusted oil pump and or cable.
16. Failure to bleed oil pump after a rebuild/replacement or running oil tank dry.
17. Engine coolant level too low, too old, or improper mixture ratio.
18. Radiator clogged, fins damaged, or faulty cap.
19. No liquid circulation due to failed oil or water pump.
20. Cavitation due to air in oil or coolant system.
21. Water and oil mix due to blown head gasket.
22. Timing retarded due to faulty CKP sensor or CDI.
23. Improper spark plug heat range (too hot) and or gap.
24. Excessive engine load, brakes dragging, clutch slipping, transmission lubricant level too low or viscosity to high.
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.
2 stroke locked up
Motorcycle Bottom End Rebuild Part 1 of 3 Engine Teardown
1999 2010 KTM 125 200 SX EXC Service Repair Manual pdf pdf
http://www.partsfish.com/page/oem-parts-for-ktm
KTM 125 SX Owner Manual

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/gregg_c0ec1df182c7330e


KTM SX 125... | Answered on Jun 09, 2017


Hi, Dawie 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 KTM, 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.
HIDDEN POWER Andrew Langston Shares Some Speed Secrets for the KTM 125SX...
How to Time KTM 125 200 Powervalves
KTM 2015 125 150 SX pdf
http://www.partsfish.com/page/oem-parts-for-ktm
2012 KTM 125 150 250 SX 250 300 XC Users Manual pdf

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/gregg_c0ec1df182c7330e


KTM SX 125... | Answered on Oct 26, 2016


Give a better description and/or some pics so I can understand what you are experiencing bud.

KTM SX 125... | Answered on Mar 14, 2015


is there a spark at the ht lead cap , remove cap and test again ? plug or cap can fail !

KTM SX 125... | Answered on Dec 06, 2013


release water undo hoses remove holding bolts

KTM SX 125... | Answered on Sep 08, 2013

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