Question about 2003 KTM SX 250

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My 2003 sx 250 doesnt seem as power full as it should , you can feel the power there but nothing like my brothers yz 250 it,s like the powerband is only half cutting in or something like that ,,,, 50 thooth back sprocket standard exhaust and has just been serviced plug filtter oil

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  • 56 Answers

HI. REMOVE THE POWERVALVE COVER ON THE SIDE OF THE CYLINDER.
MAKE SURE THE ARM IS CLIPPED ON TO THE POWER VALVE ITSELF

START YOUR ENGINE AND AS YOU REV YOUR MOTOR YOU SHOULD SEE THE ARM ON THE POWER VALVE MOVE. IF NO MOVEMENT YOU WILL HAVE TO REMOVE THAT SIDE ENGINE CASE AND CHECK CHECK VALVE FUNCTION....CHEERS

Posted on Sep 21, 2012

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6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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  • 2712 Answers

SOURCE: standard sprocket size

14/41 is stock for a full power 6 and 7 speed bike.

Posted on Nov 10, 2008

  • 2712 Answers

SOURCE: standard sprocket size

14/41 is stock for a full power 6 and 7 speed bike.

Posted on Nov 10, 2008

  • 3567 Answers

SOURCE: suspension settings for a 2000 yz 250

Just put all settings at mid-range. Then adjust from there for desired softer or stiffer ride.

Posted on Mar 11, 2009

ollie reece
  • 1167 Answers

SOURCE: 2005 YZ 250 bike has no power in the powerband motor starts

HI MATE ON THE CARB THERE 2 SCREW ONE FOR IDLE AND ONE FOR MIXTURE THE MIXTURE SCREW WILL BE THE SMALLEST UNSCREW A 1/4 OF TURNS ALSO TRY CHANGING THE PLUG OK

Posted on Aug 25, 2009

  • 1341 Answers

SOURCE: I have a 2003 sx 250 KTM After rebuild every 10

check the barrel for any even wear.

Posted on Mar 15, 2010

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2 Answers

The powerband on my 2007 yz125 doesnt feel like its running strong at all. the powerband wants to scream but it's like as if it hesitates or kicks on and off. whats going on???


Hi, Andrew and the usual suspects are:
1. Severely drained or faulty battery.
2. Faulty regulator/rectifier or high output coil.
3. Faulty power valve, solenoid or installation.
4. Clogged air filter or exhaust.
5. Cracked or incorrect float level.
6. Float needle is not seating.
7. Faulty reed valve.
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.
01 YZ 125 no power band please help Yamaha 2 Stroke
https://www.floridatrailriders.org/ftr_forums/showthread.php?t=1302
YAMAHA YZ125 Owner Service Manual
OEM parts for Yamaha
http://mybikemanuals.com/yamaha/yamaha-yz-owners-manuals

Sep 11, 2012 | 2007 Yamaha yZ 125

1 Answer

Yz 125 slow going into powerband


Hi, Anonymous and the usual suspects are:
1. Severely drained or faulty battery.
2. Faulty regulator/rectifier or high output coil.
3. Faulty power valve, solenoid or installation.
4. Clogged air filter or exhaust.
5. Cracked or incorrect float level.
6. Float needle is not seating.
7. Faulty reed valve.
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.
Dirt Rider Magazine
1999 yz250 not hitting power band
YAMAHA YZ125 Owner Service Manual
OEM parts for Yamaha
http://mybikemanuals.com/yamaha/yamaha-yz-owners-manuals

Apr 10, 2012 | 2007 Yamaha yZ 125

1 Answer

1986 Yamaha yz 250 won't rev to powerband


Hi, Patrick and the usual suspects are:
1. Severely drained or faulty battery.
2. Faulty regulator/rectifier or high output coil.
3. Faulty power valve, solenoid or installation.
4. Clogged air filter or exhaust.
5. Cracked or incorrect float level.
6. Float needle is not seating.
7. Faulty reed valve.
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.
1999 yz250 not hitting power band
2001 YZ 250 Won Hit Powerband Yamaha 2 Stroke
YAMAHA YZ250 LC Owner Service Manual
OEM parts for Yamaha
http://mybikemanuals.com/yamaha/yamaha-yz-owners-manuals

Oct 13, 2011 | 2003 Yamaha YZ 250

1 Answer

RM250 Power Issues


Hello if your motorcycle is blowing a lot of smoke and oil from the exhaust and running poorly,sounds like you have worn crankshaft bearings or the main seal is bad and sucking transmission oil.

Jun 07, 2010 | 2003 Suzuki RM 250

3 Answers

Bike boggs down no powerband rm 250


i have a 92 rm 250 an i just had it fully rebuilt an it laggs in power band an splutters an feels guttles

Oct 09, 2009 | 2003 Suzuki RM 250

1 Answer

2005 YZ 250 bike has no power in the powerband motor starts


HI MATE ON THE CARB THERE 2 SCREW ONE FOR IDLE AND ONE FOR MIXTURE THE MIXTURE SCREW WILL BE THE SMALLEST UNSCREW A 1/4 OF TURNS ALSO TRY CHANGING THE PLUG OK

Aug 25, 2009 | Yamaha YZ 250 Motorcycles

2 Answers

Ktm 200sx not running right


Is your power valve clean, and moves freely? And don't forget to make sure the air filter is squeaky clean. How does the plug color look?

Aug 09, 2009 | 2003 KTM SX 250

1 Answer

Yz 250


yz 250 two strok. measur your compresion. gas leak valve gasket cilinder. of your exhaust pipe full whit carbon. a good running 2stroke have a lot of power in al the gears. when is your last inspection of the engine? j kerkhof

Aug 02, 2009 | Yamaha YZ 250 Motorcycles

1 Answer

My 2003 KTM SX 200 lacking bottom end, top just rebuilt


isn't that a two-stroke? pull the jug off and check the piston/bore...if you can do that you're okay...Otherwise, call "Lazarus" at GT Thunder in Millersburg, FL and ask NICELY what to do.
P.S. he's a BUSY man be NICE to him!

Jun 15, 2009 | 2003 KTM SX 200

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