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Anonymous
Anonymous Posted on Aug 09, 2013
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2001 KTM 250 SX idles fine and as soon as give it 1/2 to Full throttle it smokes something awful.

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Anonymous

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  • Expert 52 Answers
  • Posted on Aug 09, 2013
Anonymous
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Joined: Aug 08, 2013
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Bad rings/ do a fuel teatment/ change oil use good oil spend the buck

  • Anonymous Aug 09, 2013

    We changed the rings, we did a fuel treatment and got the good oil. We changed all the gaskets on the bike and seals we have a new piston and rings,cleaned the carb.

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Anonymous

  • 2336 Answers
  • Posted on Nov 10, 2008

SOURCE: oil

Correct me if I'm wrong but the 250SX is a 2 Stroke engine with a Gas (1.98 Gals Unleaded Premium 91 octane Recommended) to Oil Mixture (using Motorex Cross Power 2T at a 40:1 - 60:1 depends on oil quality) and when KTM says to Change the transmission oil the amount called for is 0.7 liters engine oil using Motorex Top Speed 4T 15W50. These Quanities are from an 04 250SX could not find a 2000. So consult with your local KTM Dealer's Service Department and pickup a Owners Manual at the same time it would be in your best interest. Liter breakdown 0.7 liters = 0.739681 quart (US liquid) OR 0 quart (US liquid) and 1.47936 pt (US Liquid) / 0.7 liters = 1.47936 pt (US Liquid) OR 1 pt (US Liquid) and 0.958726 cups (US)

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Anonymous

  • 1 Answer
  • Posted on Jun 11, 2009

SOURCE: bleeding the clutch fluid on a ktm 250 sx 07 model

use a big syringe with plastic tube on the end and pump the fluid from the slave cylinder up to the master cylinder till the resevoir is full, hope that helps

Anonymous

  • 2 Answers
  • Posted on Jul 01, 2009

SOURCE: My KTM lc4 640 running problems

Check your valves. they might be tight. possible shimming required there to get them back to spec

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ok buddy you can try this on carb is a scew the mixture screw try fidling with this till it runs ok and do the same with the idle only turn the idle screw in 1/4 turns at a time until it idles get back to me if not okee2a68c.jpg
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New spark plugs last 10-15 minutes of riding
Hi and welcome to FixYa,

Offhand, the only factor to be checked that could foul a sparkplug for your bike would be the 2T oil injector/pump. There is too much 2T oil going to the combustion chamber. Either the injector would require restricting or for some reason, there is also 2T oil in the fuel tank (pre-mix).

Good luck and Thank you for using FixYa. Happy Holidays.
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