Honda NSS250/A Service Manual
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JEFF
May 6, 2025

HONDA 2002 REFLEX GARAGE KEPT 520 MILES ? WILL NOT START NEW BATTERY ? CRANKS FINE ? PULLED PLUG HAS GOOD SPARK ? I INJECTED SOME 100% GASOLINE INTO THE CYLINDER ? AND IT STILL DID NOT FIRE ? CRANKS AND ? RARELY TOU HERE A LACKADAISICAL POP NOT FIRE UP AND RUN MOMENTARILY ?

1 comments:
Mr. Anderson
May 18, 2025

If a 2002 Honda Reflex NSS250/A won't start despite having a new battery, good spark, and fuel injected into the cylinder, possible reasons include:

1. Incorrect Fuel-Air Mixture: Even with fuel injection, the mixture might be too rich or too lean due to a faulty injector, clogged air filter, or malfunctioning sensors like the MAP, TPS, or IAT.

2. Compression Issues: Low or no compression from worn piston rings, damaged valves, or a blown head gasket can prevent starting.

3. Timing Problems: Incorrect valve or ignition timing due to a slipped or broken timing chain/belt or improperly set timing can prevent combustion.

4. ECU or Sensor Failure: A faulty ECU or bad sensor (e.g., crankshaft position sensor) can prevent proper fuel delivery or spark timing.

5. Clogged or Faulty Fuel Injector: The injector may spray fuel, but not in the proper pattern or quantity needed for combustion.

6. Choke or Idle Control Malfunction: If the idle air control valve or automatic choke is stuck, it can affect cold starting.

7. Excess Fuel Causing Flooding: Too much fuel can flood the cylinder, wetting the spark plug and preventing ignition.

8. Security or Kill Switch Activated: A kill switch or sidestand sensor may prevent starting even if mechanical systems are okay.

Compression test, checking timing marks, and scanning for ECU error codes can help diagnose the issue.

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Ronald Stewart
May 4, 2025

How to remove the ignition switch on it

1 comments:
Mr. Anderson
May 17, 2025

To remove the ignition switch on a Honda NSS250/A (also known as the Honda Reflex), follow these steps:

1. Disconnect the Battery:
- Turn off the ignition and disconnect the negative terminal of the battery to prevent electrical shorts.

2. Remove Front Covering Panels:
- Remove the screws and clips securing the front fairing or leg shield to access the ignition switch area.
- Carefully detach the panels around the ignition switch.

3. Access the Ignition Switch:
- Locate the ignition switch mounted on the steering column.
- Trace the wiring harness from the switch to its connector and disconnect it.

4. Remove the Ignition Switch:
- The ignition switch is typically secured with tamper-proof bolts or screws.
- Use a drill or special tool to remove these bolts.
- Once unbolted, carefully pull out the ignition switch.

5. Install Replacement (if needed):
- Position the new switch.
- Secure it using bolts or screws.
- Reconnect the wiring harness.

6. Reassemble Panels and Reconnect Battery:
- Reinstall all body panels and screws.
- Reconnect the battery.

7. Test the Ignition:
- Turn the key to ensure the ignition works properly.

Note: Some models may require key programming if replacing the ignition switch.

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James Huddleston
July 16, 2025

Tire pressure front and rear

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