Question about 2005 KTM 50 Senior Adventure

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2002 ktm pro senior wont fire after replacing the piston

2002 ktm pro senior will not start after replacing the piston but it was running great before we changed the piston. We have a spark and efficient fuel but it still wont fire.

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  • Expert
  • 87 Answers

Did you check youre compression and did you use the right size piston for the head also did you measure the cylinder bore for tapering

Posted on Mar 30, 2014

6 Suggested Answers

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  • 2 Answers

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Posted on Jan 02, 2017

  • 4 Answers

SOURCE: 07 ktm 450sxf wont start

take your carb out, clean the entire thing, that means every nook in that *****. do this and if still a problem write back because in most cases were n idiot is involved, this is the most over looked problem

Posted on Feb 17, 2009

  • 112 Answers

SOURCE: 06 ktm 50 pro senior bogs after warming up

It sounds like he is running out of fuel in the bowl,poss accelarator pump ?

Posted on Apr 02, 2009

sisadsl
  • 1508 Answers

SOURCE: I have a KTM 50

A new clutch should not affect timing, the timing triggers of the flywheel

Posted on May 11, 2011

mxtras
  • 194 Answers

SOURCE: have a 2007 ktm 50

You likely need a smaller pilot jet in the carb.

Try screwing the air screw in and out - if screwing it out seems to help then you need to change your pilot (low speed) jet. I don't have any recommendations for you as far as size, but just get one the next smaller size from what's in there now. When perfectly sized, your air screw will like to be set around 1.5-2.0 turns from seat.

This could also be a sign that you need a new ring. The rings don't last long in these bikes - you need to re-reing quite frequently. it's a very common thing. Lower compression from a worn ring will make the motor act as if it's too rich due to incomplete combustion and lower combustion temps. A worn ring will show up at lower engine speeds first- much like you describe.

Scott

Posted on May 24, 2011

Geekman
  • 32281 Answers

SOURCE: My son's KTM 50 senior pro doesn't start. has petrol vapour coming out of the pipe.

The engine is running too rich. The carburator needs tuning to get the fuel mixture correct or the choke may be stuck in a partially closed position.

Posted on Feb 11, 2012

Testimonial: "Hi Chris, many thanks for your feedback. You were 100% correct! I performed what you stated and she fired-up! Thanks again..."

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1 Answer

Ktm 50sx senior pro crankshaft tolerances


Hi, Wayne 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 zero $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.
KTM 50 SX Repair Manual
http://www.ktm-parts.com/pdf/KTM%202000%2050/KTM%202000%2050.pdf
http://www.partsfish.com/page/oem-parts-for-ktm
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1 Answer

My brother has a 2004 ktm pro senior 50 went for a ride after 20 minutes it died and now the spark just comes and goes..can someone help me, please


Hi, Bowe the following applies to carbureted also fuel injected models and the usual suspects are:
1. Severely discharged or a damaged battery, should have 12.5 volts or better and be able to pass a load test if necessary.
2. Failed alternator/generator and or voltage regulator.
3. Loose or corroded battery terminals and or cables especially the "NEGATIVE" cable, look for loose, corroded, or broken connectors inside the cable harness at "BOTH" ends.
4. Failed main circuit breaker or ignition switch, check for loose connections and continuity.
5. Failed system and or ignition relay, check for continuity.
6. Failed ignition coil, ignition/electronic module.
7. Failed CKP, CPS, CMP, MAP, TPS, or BAS sensor, corroded, loose or broken wire connector pins/sockets.
8. Throttle cables and or idle speed improperly adjusted hot idle speed should be 950 RPM to 1000 RPM.
9. Air/fuel mixture screw improperly adjusted.
10. Water or dirt in the fuel system, carburetor or filter.
11. Restricted, blocked or kinked fuel line.
12. Fuel tank empty.
13. The gas cap is not venting properly or fuel tank venting system blocked.
14. A failed fuel pump, pressure regulator and or fuel injectors.
15. Vacuum line from intake manifold to petcock broken, cracked, or not attached, carburetor vent line plugged.
16. Needle and seat stuck closed in the float bowl.
For more information about your issue and valuable "FREE" downloads that you need please click on the links below. Good luck and have a nice day.
Dirt Rider Magazine
2004 KTM 50 Senior Adventure won start
ktm 50 sx
https://www.tradebit.com/filedetail.php/279443074-2003-ktm-50sx-pro-senior-lc-motorcycle

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Everything. Seriously. Racing is HARD on a bike.

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Ktm 250 xf 2006, riding fine then i slowed down, there was a bang and engine stopped and wont start. Can push bike, took heaqd off and pistons seem fine and no debris lying about. Any ideas?


ya very similar thing happened to me at a trials meet started my vintage kawasaki kt and it warmed up fine then took it for a run heard a bang and it wouldnt re start turned out i broke the crank shaft right in half there for the bike would push but it wouldnt start easy fix just found a crankshaft and it worked great probably was a clean break wich explains why there is no debris

Feb 26, 2012 | KTM Motorcycles

1 Answer

My son's KTM 50 senior pro doesn't start. has petrol vapour coming out of the pipe.


The engine is running too rich. The carburator needs tuning to get the fuel mixture correct or the choke may be stuck in a partially closed position.

Feb 11, 2012 | 2006 KTM 50 Senior Adventurer

1 Answer

03 KTM 50 Senior Adventure transmission is locked up... The engine runs fine, it just wont turn the sprocket. Any ideas?et


Clutch problem I'm guessing the clutch is slipping and needs adjustment or replacing when clutch went on warrior it would rev and everything just not move when in gear

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2 Answers

Bogging


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Jul 10, 2009 | 2002 KTM SX 125

2 Answers

06 ktm 50 pro senior bogs after warming up


It sounds like he is running out of fuel in the bowl,poss accelarator pump ?

Apr 02, 2009 | 2006 KTM 125 SX

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