Question about 2000 KTM EXC 300

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I HAVE A 2000 KTM 520 IT HAS BEEN SITTING FOR A COUPLE YEARS I GOT IT GOING BUT IT BACKFIRES WITH THE CHOKE OFF I TOOK THE CAP FOR THE FLOAT BOWL OFF AND BLEW AIR THREW THE LINES BUT NOTHING STILL BACKFIRES?

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The idle jet is cloged, remove it and clean carb., take off float bowl and clean it, put some Seafoam in your gastank, mopar Kenny.

Posted on May 20, 2011

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Hi I have a 2000 model KTM 520 not getting fuel to the Carby once I clean the carburettor does anyone have any ideas or know where I can download a good diagram would be a great help thank you


Hi, Tim always check fuel flow first to isolate the problem area otherwise the usual suspects are:
1. Fuel tank empty.
2. Fuel cap or fuel tank not venting properly.
3. Fuel filter clogged with rust or dirt.
4. Fuel valve/petcock not in the on or reserve position.
5. Vacuum line to fuel valve cracked, broken, pinched, or missing*
6. Fuel valve/petcock clogged or diaphragm cracked, cut or torn*
7. Fuel line from the fuel valve to the carburetor or fuel pump clogged, cracked, pinched, bent, broken, or missing.
8. Fuel pump not working*
9. Fuel line touching cylinder or head causing fuel to boil and vapor lock, repair by rerouting and wrapping line with convoluted tubing.
10. Carburetor inlet clogged.
11. Carburetor float or needle and seat stuck.
12. Carburetor not venting properly overflow line or bowl fitting clogged, pinched, or bent.
* If equipped or applicable.
For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have nice a day.
Carburetor Set up 101 This is the Holy Grail/Bible on KTM carbs
Dirt Rider Magazine
2000 2007 KTM 250 400 450 525 SX EXC service repair manual pdf
http://www.partsfish.com/page/oem-parts-for-ktm
2001 KTM 400 520 SX MXC EXC RACING pdf

Nov 23, 2016 | 2001 KTM SX 520 Racing

1 Answer

When I turn on my bike, gas runs out of the bottom of the bike. It is a 89 Gold Wing. IT has been sitting maybe a couple years. I bought it like this. I'm going to start a tare down this weekend. Just...


I would have say the float in your carb is stuck. Take the bowl off the bottom and see if your float needle is sticking if not check your fuel line's .

Oct 16, 2013 | Honda GL 1500 Gold Wing Motorcycles

1 Answer

2001 Shadow Sabre, Won't idle with choke off unless giving it some throttle.


Hi, Rickgilbreat and the usual suspects are:
1. Fuel cap or fuel tank is not venting properly.
2. Fuel filter clogged.
3. Fuel line pinched or kinked.
4. Vacuum line from the petcock to intake manifold cracked.
5. Float needle and seat sticking.
6. Float level too low.
7. Carburetor bowl vent line clogged/blocked/pinched.
8. Idle adjusting screw set too low.
9. Air/fuel mixture screw set too lean.
10. Idle port, transfer ports, slow air jet clogged.
11. Slow fuel jet clogged.
12. Faulty fuel pump.
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.
Starts but won stay running unless with choke Discussion
Won idle without choke
Honda shadow vt1100 Owners Workshop Manual
http://www.partsfish.com/page/oem-parts-for-honda
Honda VT1100C2 Owner Manual Page 3

Aug 23, 2012 | 2001 Honda VT 1100 C2 Shadow Sabre

1 Answer

'07 klr 650 won't run without choke on


Hi, Lance and the usual suspects are:
1. Fuel cap or fuel tank is not venting properly.
2. Fuel filter clogged.
3. Fuel line pinched or kinked.
4. Vacuum line from the petcock to intake manifold cracked.
5. Float needle and seat sticking.
6. Float level too low.
7. Carburetor bowl vent line clogged/blocked/pinched.
8. Idle adjusting screw set too low.
9. Air/fuel mixture screw set too lean.
10. Idle port, transfer ports, slow air jet clogged.
11. Slow fuel jet clogged.
12. Faulty fuel pump.
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.
Won run without choke
KLR won idle without choke backfires on decel
Kawasaki KLR650 Service Manual
OEM Parts for Kawasaki
Kawasaki KLR650 Owner Manual

Jul 01, 2017 | 2007 kawasaki KLR 650

1 Answer

A week ago i took my bike to get fixed at a shop it had been sitting for about 2 years the guy said it was a dirty carb and a dirty gas tank he cleaned both and the bike ran fine i rode it for 2 min. or so...


Try replacing spark plug,and check for spark if you do good,check to see if you have fuel to carb,at bottom of carb there is a float bowl screw loosen the screw and let fuel drain,tighten screw,choke and try again,sometimes when bike sits that long it may need one or two cleans,the bad gas that was in it still has varnash build up and can still clog up the jets.hope this helps.

Feb 17, 2011 | Suzuki RM 125 Motorcycles

1 Answer

1980 Yamaha xt250 won't idle without the choke being on


Hi, Earthquakeau and the usual suspects are:
1. Fuel cap or fuel tank is not venting properly.
2. Fuel filter clogged.
3. Fuel line pinched or kinked.
4. Vacuum line from the petcock to intake manifold cracked.
5. Float needle and seat sticking.
6. Float level too low.
7. Carburetor bowl vent line clogged/blocked/pinched.
8. Idle adjusting screw set too low.
9. Air/fuel mixture screw set too lean.
10. Idle port, transfer ports, slow air jet clogged.
11. Slow fuel jet clogged.
12. Faulty fuel pump.
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.
Older XT250 Won Run Some Choke
Bike won Run without Choke
Yamaha XT250X Service Manual
OEM parts for Yamaha
Yamaha XT250 Owner Manual

Feb 14, 2011 | 2008 Yamaha XT250

1 Answer

KTM 520EXC Starts with choke but you cannot take off choke


well you hit it right on the head there,, its the jets in the carb blocked up,,strip down carb and clean out all the jets with carb cleaner and compressed air dont go poking any thing into the jets as you will distroy them that way,,, another way of clearing the jets out that you could try first is,,,take off the air filter and start the engine up on choke in needs be,,rev the motor up high and slam your hand over the carb intake,,removing it just before the motor cuts out do this a good fuw times and it some times??? only some times clears the carb jets out for you

May 20, 2010 | 2002 KTM MXC 520 Racing

2 Answers

Hi: My 2004 Harley will only run when leaving choke on, as soon as I push in choke the bike shuts down, also backfires when giving it gas when choke is still on, do you have any ideas what maybe causing...


sat up too long pull the carb bowl remove the jets clean and reinstall them pull your petcock off clean the screen put in good gas,and you should be set when you turn the gas on if the bowl vent leaks gas tap the carb bowl the float needle will find its seat and run

Apr 21, 2010 | Harley Davidson Harley-Davidson Motorcycle...

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