Ninja 250R Dead On Throttle Pt 1

Ninja 250 Part 1 of 2 No Start.
Carburetor Passages and Idle Jets clogged
Dead on throttle No idle.Idle on choke only.
Stalls On Throttle.
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Other Carburetor Symptoms Below
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GAS OVERFLOW

Check your float Needles if your having overflow and flooding problems.

The springs keep the needle tip from pounding itself against the needle seat.Also bumpy roads or terrain cause the floats to bounce.The spring needles keep the bowl from overfilling.

1. Restricted fuel tank vent system.

2. Loose float bowl screws.

3. Damaged float bowl O-ring.

4. Damaged or leaking float assembly.

5. Particle contamination in fuel inlet fitting cavity.

6. Worn or dirty inlet valve or seat.

7. Improper fuel level in float bowl.
POOR IDLING

1. Idle speed improperly adjusted.

2. Inlet system air leak (faster idling).

3. Loose low speed jet.

4. Contaminated or plugged low speed system.

5. Enrich valve not seated or leaking.

6. Leaking accelerator pump.
POOR FUEL ECONOMY

1. Excessive use of enrich system.

2. Enrich valve not seated or leaking.

3. Dirty air cleaner filter element.

4. Restricted fuel tank vent system.

5. High speed riding style.

6. Idle speed improperly adjusted.

7. Loose jets.

8. Fuel level too high.

9. Plugged or restricted bowl vent.

10. Worn or damaged needle or needle jet.

11. Vacuum piston assembly malfunction.

12. Plugged air jets or passages.

13. Excessive accelerator pump output.

14. Idle mixture screw adjusted to far out
POOR ACCELERATION

1. Throttle cables misaligned.
2. Inlet system air leak.

3. Restricted fuel tank vent system.

4. Restricted fuel supply passages.

5. Plugged bowl vent or overflow.

6. Enrich valve not seated or leaking.

7. Worn or damaged needle or needle jet.

8. Vacuum piston malfunction.

9. Plugged jets or passages.

10. Fuel level too low.

11. Accelerator pump leaking or no output.
HARD STARTING
1. Choke (Enrich system) plugged, not properly functioning or improperly operated.

2. Inlet system air leak.

3. Restricted fuel supply. No fuel in float bowl.

4. Fuel overflow.

5. Plugged slow jet or passages

6. On high compression (over 10:1) engines, excessive voltage drop to the ignition coil can cause hard starting. A clear indication that this is the problem is that the engine wants to start after releasing the starter button.
POOR PERFORMANCE ON ROAD
1. Idle speed improperly adjusted.

2. Inlet system air leak.

3. Restricted fuel tank vent system.

4. Dirty or damaged air cleaner element.

5. Enrich valve not seated or leaking.

6. Restricted fuel supply tract.

7. Plugged bowl vent or overflow.

8. Loose or plugged fuel and air jets or passages.

9. Worn or damaged needle or needle jet.

10. Vacuum piston assembly malfunction.

11. Accelerator pump inoperative.
POOR HIGH-SPEED PERFORMANCE
1. Inlet system air leak.

2. Enrich valve not seated or leaking.

3. Restricted fuel tank vent system.

4. Restricted fuel supply tract.

5. Dirty or damaged air cleaner element.

6. Plugged bowl, vent or overflow.

7. Worn or damaged needle or needle jet.

8. Vacuum piston assembly malfunction.

9. Loose or plugged main jets or passages.

10. Improper fuel level.

11. Accelerator pump inoperative.

12. Restrictive exhaust flow.
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