- Fuel filter: If the fuel filter is clogged, it can restrict the flow of fuel to the engine, causing it to stall. Clean or replace the fuel filter.
- Fuel line: If the fuel line is kinked or blocked, it can also restrict the flow of fuel to the engine. Inspect the fuel line and make sure it is clear.
- Carburetor: The carburetor is responsible for mixing fuel and air in the correct ratio for the engine. If the carburetor is dirty, clogged, or out of adjustment, it can cause the engine to stall. Clean the carburetor and make sure it is properly adjusted.
- Spark plug: If the spark plug is worn out, damaged, or improperly gapped, it can cause the engine to stall. Inspect the spark plug and replace it if necessary.
- Air filter: If the air filter is clogged, it can restrict the flow of air to the engine, causing it to stall. Clean or replace the air filter.
- Valves: If the valves are not properly adjusted, it can cause the engine to stall. Check the valve clearance and adjust the valves if necessary.
If you are unsure of how to troubleshoot or repair your TTR90, please consult with a qualified mechanic.
