There may be no spark at the plug on a Yamaha TTR250L due to one or more of the following issues:

1. Blown main fuse (no continuity).
2. Weak or dead battery.
3. Faulty spark plug (improper gap or worn electrodes).
4. Faulty spark plug cap (resistance issue).
5. Faulty ignition coil (resistance issue).
6. Faulty pickup coil (resistance issue).
7. Bad wiring connection in the ignition system.
8. “ENGINE STOP” switch is faulty or engaged.
9. Main switch is faulty.

Each of these components should be checked and tested to determine the cause.

This answer is automatically generated

Jerry Dorl

April 13, 2025

Can't get no fires

3 comments:

Jerry

April 13, 2025

@Jerry Dorl mo

Mr. Anderson

April 13, 2025

The Yamaha TTR250L may not start due to one or more of the following issues:

1. Electrical System:
- Blown main fuse (check for continuity and replace if needed).
- Weak or dead battery (check open circuit voltage).
- Faulty ignition components such as CDI unit, ignition coil, spark plug cap, or spark plug.

2. Fuel System:
- Clogged fuel filter, fuel hose, breather hose, or strainer.
- Deteriorated fuel or fuel containing water or foreign material.
- Improperly adjusted fuel level or clogged jets in the carburetor.

3. Ignition System:
- Broken or shorted ignition coil wires.
- Faulty CDI or pickup coil.
- Incorrect spark plug gap or worn electrodes.

4. Compression System:
- Loose or damaged spark plug.
- Broken cylinder head gasket or improperly sealed valve seat.
- Worn or seized cylinder or crankshaft.

Check each system step by step to find and fix the issue.