Question about 2000 KTM EXC 250

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My KTM 250 EXC has been sitting all winter. Now it won't start. Plug looks fine and I put fresh fuel in.

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???? check oil and try to choke with hand and clean carb

Posted on Mar 10, 2009


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Posted on Jan 02, 2017


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My 2000 ktm 200 will not start

Hi, Aw98628 and the usual suspects are:
1. Fuel tank empty.
2. The fuel tank has old dead gas.
3. Fuel tank bottom contaminated with ethanol sludge, dirt, water, rust, etc.
4. Fuel supply valve/petcock turned off.
5. Fouled spark plugs.
6. Engine flooded as a result of overuse of the enrichner.
7. Vacuum hose to the fuel supply valve/petcock disconnected, broken, cracked, or pinched.
8. Fuel valve/petcock or filter clogged.
9. Fuel line to carburetor or throttle body pinched, kinked or blocked.
10. Carburetor float stuck.
11. Fuel injectors clogged.
12. A severely discharged or damaged battery, you need 12.5 volts or better and be able to pass a load test if necessary.
13. Check battery terminals for damage or corrosion, check the battery cables at "BOTH" ends for loose, corroded, or broken connectors, "INSIDE" and outside the cable harness, perform connector wiggle test and check cables with an ohmmeter if necessary.
14. Loose or corroded wire connection at the coil or plug between ignition sensor and ECM module.
15. Spark plug cables in bad condition and shorting check for spark leakage in the dark, cable connections loose, or connected to the wrong cylinders.
16. Ignition timing incorrect due to a faulty ignition coil, ignition module or MAP, CMP, CKP, O2, TPS, ETP, IAC sensors.
17. Faulty neutral, clutch lever, or kickstand safety switch.
18. Faulty fuel pump or fuse or relay.
19. A stuck bent or burnt valve.
20. Tilt sensor needs a reset.
21. Security system not disarming alarm needs a reset.
22. Check for engine trouble codes.
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.
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1 Answer

2007 KTM 125 EXC cuts out when warm

Hi, Jayjaynoble and the usual suspects are:
1. Faulty ignition coil.
2. Faulty spark plug cables.
3. Faulty temperature sensor.
4. Faulty starter motor.
5. Valves adjusted too tight.
6. Spark plug gap too wide.
7. Fuel has vapor lock.
For more information about your issue and valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
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1 Answer

My KTM started before winter, so I changed the spark plugs and put a new sprocket on it, and new gas. but it will not start. What could it be, or what are some troubleshooting tips?

I am assuming you didn't drain your carb prior to winterizing. So just because you put new gas in doesn't mean that you couldn't have obstructions in the carb from sitting through the winter. Remember in order to start you need 3 things:
1) Compression
2) Spark
3) Fuel

More than likely your compression is good.
Double check that you have spark.
Then confirm your carb is clean.

Feb 22, 2011 | 2000 KTM EXC 300

1 Answer

Starts ok when cold stalls when hot and wont re start, i have checked valve clearances

Do not twist the throttle when re-starting a hot engine. That bike floods easily. The power valve in the carb squirts gas into the cylinder with every twist of the throttle. A fresh spark plug will also help.

Feb 02, 2011 | 2008 KTM 250 EXC-F

1 Answer

Bikes been sitting for about 2 yrs, no use.

Most likely source of a problem will be a gummed up carb. Clean it thoroughly and drain fuel tank and replace with fresh fuel. Probably would be a good idea to check the valve lash, too.

May 20, 2010 | 2001 KTM Exc-Racing E 400

1 Answer

Is fitting clutch plates to ktm exc-f 2004 a big job

Make sure to put every thing you take of in order and if needed do a drawing so that you can see what part goes where .The last part you take off will be the first part you put back on .

Mar 18, 2010 | 2004 KTM EXC 250

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2005 KTM EXC 525 Racing put in gear but not moving

Hi, Mark for this scenario you will need your service, parts fiche, and owners manual if you can't find the 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 for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
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Aug 25, 2017 | 2005 KTM EXC 525 Racing

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