2005 KTM 250 SX - Answered Questions & Fixed issues


the SX forks really should be taken to a suspension tech to get the inner chamber properly bleed out.
You never just add a cc amount because there is usually some left inside. You bleed out the air and fill. once no more air is coming out you set the fluid level on the outter chamber 110mm to 120mm with the spring out and the fork collapsed.

2005 KTM 250 SX | Answered on Jan 07, 2015 | 240 views


water pump seal

2005 KTM 250 SX | Answered on Jan 07, 2015 | 27 views


Take the engine apart and you will find out.
Quite possibly will need new piston kit and a thorough cleaning and you'll be fine.
If you're unlucky, main bearings, and cylinder coating repair.

KTM 250 SX... | Answered on Jun 27, 2014 | 176 views


Mervin, I'm not a motorcycle mechanic, but just knowing engines as I do, I would say drain the fuel tank and replace with new fuel and either a water remover additive or a more complete fuel treatment (Lucas makes some great products for that); pull the plug(s) and check them for any corrosion or buildup, replace if necessary; change the oil and filter; check the air cleaner; and check tensioning on any belts. I'd also suggest either replacing the battery straight away or just putting it on a charger for a while so you know it has a full charge when you go to start it - if you need to replace it, that will eventually become evident, but you should at least be able to get the engine started and see what else -if anything- needs doing.

KTM 250 SX... | Answered on Dec 03, 2013 | 39 views


The starter pinion attached to the kick pedal has an ratchet pin that engages in the engine shaft - the role of the pin is to allow the engine to turn freely once started. This pin is pressed on the shaft with a simple spring that in your case either broke or went out of position.
You will need to open that side of the transmission, access the starter mechanism and refit or replace the pin and its spring - it's a delicate job, work very carefully or you can do a lot of damage if you try to start the engine with the parts misplaced.

KTM 250 SX... | Answered on Sep 25, 2011 | 24 views


Hi, try to see this link and looking for the manual that you need.
https://www.pdfmotomanual.com/manuales/ktm/eng
I hope to give you an help.
Luca

KTM Motorcycles | Answered on Dec 25, 2019 | 379 views


my ­b­est ­fr­i­e­n­d's s­ist­er-­i­n-­l­Aw ­m­A­k­es $74 ­ev­ery ­h­our ­o­n t­h­e ­c­o­m­put­er. S­h­e ­h­As ­b­e­e­n u­n­e­m­p­l­oy­e­d ­f­or t­e­n ­m­o­nt­hs ­but ­l­Ast ­m­o­nt­h ­h­er ­p­Ay­m­e­nt w­As $16505 just w­or­k­i­n­g ­o­n t­h­e ­c­o­m­put­er ­f­or ­A ­f­ew ­h­ours. ­g­o t­o t­h­is w­e­b s­it­e ­A­n­d r­e­A­d ­m­or­e ­g­o t­o t­h­is s­it­e ­h­o­m­e t­A­b ­f­or ­m­or­e ­d­et­A­i­l ...
www.online-3.com

KTM Motorcycles | Answered on Dec 21, 2019 | 273 views


Drain oil. Use degreaser to clean area. Use JB Weld & allow to set up properly before adding oil.

If you’ve found this helpful, please click the green “helpful” icon. If you have 20 seconds please leave a few words as a review or recommendation! Also, follow me for more answers to everyday issues, I’m all for saving you money and making the most of your time! Thanks and have a great day!

KTM Motorcycles | Answered on Mar 14, 2020 | 84 views


It's a bad seal of the head gasket. You need a new head gasket and to scrape every particle of debris from the cylinder head and cylinder surfaces that mate with the head gasket. Use the factory specified gasket sealing compound and do a clean job - no blobs or pools of the stuff. The head gasket should lay flat on the surface of the top of the cylinder, and you have to make this surface free of grit, leftover sealant and any other foreign matter before you put the head in place and torque it down. Start with the head bolts just finger tight and then go by the manufacturer's specs for the pattern and amount of torque to be applied. Usually it is recommended that you get to the specified torque amount in stages, going around several times and repeating the torque pattern until you get that maximum rated amount. This will prevent the seal from shifting or warping and should make the gasket seal perfectly. This is the old school method of doing this job. and I have never seen this fail to produce good results. Take your time, be clean, and you will have the results you want.

KTM Motorcycles | Answered on Dec 31, 2018 | 116 views


over full sump
fuel getting into sump
badly worn rings allowing excessive blow by

KTM Motorcycles | Answered on May 05, 2018 | 77 views


Make sure cables are working . Follow it down to clutch and make sure clutch lever is actually moving. It is does then pull clutch in and pushbike backwards. Should release If not , plates are probably frozen through excessive heat. Replace them. If lever does not move when clutch handle pulled, then adjust or broken cable. hope that' it, easier and cheaper!

KTM Motorcycles | Answered on Sep 24, 2017 | 63 views


Make sure the wires on the other side of the relay box are holding when you push the relay in.

KTM Motorcycles | Answered on Aug 22, 2017 | 515 views


Have you tried an emissions test? That can tell you a lot about how the combustion is doing, and what you would need to adjust at the carburetor. Have you checked the spark plugs?

KTM Motorcycles | Answered on Jul 26, 2017 | 929 views


unfortunately the most cmmn cause for a bike not starting ff the kick start but starting with a bump is being too low on compression,although to you foot it may feel like enough it does need to be nearly 100% as high as it should be to kickstart.the easiest way to check the condition of the piston is to take the exhaust off and look up the port in the barrel ,it is usually the exhaust side of the piston that gets damaged as it gets hotter.good luck.Adam

KTM Motorcycles | Answered on Dec 24, 2016 | 828 views

Not finding what you are looking for?
2005 KTM 250 SX Logo

7 questions posted

Ask a Question

Usually answered in minutes!

Popular Products

2006 KTM 250 SX
2006 KTM 250 SX

12 Questions

2008 KTM 250 SX
2008 KTM 250 SX

8 Questions

2007 KTM 250 SX
2007 KTM 250 SX

3 Questions

2010 KTM 250 SX
2010 KTM 250 SX

2 Questions

2009 KTM 250 SX
2009 KTM 250 SX

1 Questions

Top KTM Experts

Marvin
Marvin

Level 3 Expert

85239 Answers

Gino Cussen
Gino Cussen

Level 2 Expert

217 Answers

Arnie Burke
Arnie Burke

Level 3 Expert

6523 Answers

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

Answer questions

Manuals & User Guides

Loading...