How to Replace Light Bulbs on a 2025 Honda CB500X
Light Bulb Replacement Guide: 2025 Honda CB500X
This guide covers every exterior light bulb position on the 2025 Honda CB500X, including the headlight (combined low/high beam), front and rear turn signals, tail/brake light, and license plate light. The CB500X is an adventure-touring motorcycle with a compact windscreen and upright ergonomics designed for both on- and off-road use.
Quick Reference Bulb Table
| Position | Bulb Type | Wattage | OEM Part Number | LED Upgrade Option |
|---|---|---|---|---|
| Headlight (Low/High Beam) | H4 | 60/55W | HONDA 34901-MAL | H4 LED (Sylvania ZEVO / Philips Ultinon) |
| Front Left Turn Signal | 1157NA (Amber) | 28.3/8.3W | HONDA 34906-MAL | 1157 Amber LED |
| Front Right Turn Signal | 1157NA (Amber) | 28.3/8.3W | HONDA 34906-MAL | 1157 Amber LED |
| Rear Left Turn Signal | 1157NA (Amber) | 28.3/8.3W | HONDA 34906-MAL | 1157 Amber LED |
| Rear Right Turn Signal | 1157NA (Amber) | 28.3/8.3W | HONDA 34906-MAL | 1157 Amber LED |
| Tail / Brake Light | 1157 (Dual Contact) | 28.3/8.3W | HONDA 34904-MAL | 1157 Red LED (Sylvania ZEVO) |
| License Plate Light | W5W (T10) | 5W | HONDA 34908-MAL | W5W White LED |
Difficulty & Time Estimate
- Difficulty Level: Beginner (1 out of 5)
- Estimated Time: 15-35 minutes depending on positions replaced
- Best Done: In a well-lit area with the bike on a stand or level surface
Complete Tool List
| Tool | Size or Type | Purpose |
|---|---|---|
| Phillips screwdriver | #2 (JIS standard) | Remove headlight housing and fairing fasteners |
| Flathead screwdriver | Small | Gentle prying of trim pieces and bulb retainers |
| Needle-nose pliers | Standard | Grip and pull bulbs from sockets |
| Socket set | 8mm, 10mm | Remove license plate bracket and tail housing bolts |
| Torque wrench | Small (Nm range) | Re-torque fasteners to spec (Nm) |
| Clean microfiber cloth | Any | Clean headlight lens and bulb glass |
| Isopropyl alcohol (optional) | 70-99% | Clean bulb glass if accidentally touched |
| Gloves | Nitrile | Prevent skin oils from touching bulb glass |
| Dielectric grease | Tub or squeeze tube | Coat bulb contacts to prevent corrosion |
OEM Part Numbers & Aftermarket Alternatives
| Position | OEM Part | Aftermarket Halogen | LED Alternative |
|---|---|---|---|
| Headlight H4 | Honda 34901-MAL | Sylvania SilverStar H4 | Sylvania ZEVO H4 LED / Philips Ultinon |
| Turn Signal 1157NA | Honda 34906-MAL | Philips 1157NA Amber | Sylvania ZEVO 1157 Amber LED |
| Tail/Brake 1157 | Honda 34904-MAL | Philips 1157 Long Life | Sylvania ZEVO 1157 Red LED / JAG-LED |
| License Plate W5W | Honda 34908-MAL | Sylvania W5W (194) | Sylvania ZEVO W5W White LED |
Note: Honda part numbers use model-specific suffixes. Verify exact part numbers with your Honda dealer or owner's manual.
Step-by-Step Instructions
Headlight (H4) — Combined Low and High Beam
The 2025 Honda CB500X uses a single H4 halogen headlight bulb for both low and high beam, housed behind the headlight bucket below the small windscreen.
Step 1: Turn the ignition OFF and allow the headlight to cool for at least 10 minutes.
Step 2: Remove the headlight housing screws. On the CB500X, these are JIS Phillips-head fasteners (#2). Use a JIS or high-quality Phillips screwdriver to avoid stripping.
Step 3: Carefully disconnect the electrical connector from the base of the bulb. Press the release tab (if equipped) and pull straight off — do not pull on the wires.
Step 4: Remove the rubber dust boot sealing the rear of the headlight housing. Pull evenly from all sides.
Step 5: Release the wire retainer clip holding the bulb. Press the clip inward and slide it away from the bulb tabs.
Step 6: Pull the old H4 bulb straight out of the housing. Do not grip the glass — handle by the metal base only.
Step 7: Open the new H4 bulb and handle by the base using nitrile gloves. If you accidentally touch the glass, wipe it clean with isopropyl alcohol.
Step 8: Insert the new bulb into the headlight housing. H4 bulbs have three flat prongs at the base for correct orientation — align these with the slots in the housing. Push firmly until fully seated.
Step 9: Reinstall the wire retainer clip over the bulb. It should snap securely.
Step 10: Reinstall the rubber dust boot. Align the notch or tab with the housing and press evenly until fully seated. Verify no gaps.
Step 11: Reconnect the electrical connector, pushing firmly until it clicks.
Step 12: Before reinstalling the headlight housing, test with the ignition ON. Cycle between low and high beam to confirm the bulb functions.
Step 13: Reinstall the headlight housing and tighten the JIS Phillips screws. Tighten evenly — snug but not forced.
Step 14: Verify headlight beam alignment (see Tips section below).
Front Turn Signals (1157NA) — Amber
Step 1: The front turn signals on the CB500X are mounted on stalks near the fork legs, below the small windscreen and hand guards. Access the rear of each turn signal housing.
Step 2: Pull the rubber access grommet at the rear of each turn signal housing back to expose the bulb socket.
Step 3: Turn the socket counterclockwise approximately a quarter-turn and pull it straight out of the housing.
Step 4: Remove the old 1157NA amber bulb by pressing it gently into the socket and turning counterclockwise to unlock the bayonet base.
Step 5: Install the new 1157NA amber bulb. Push into the socket and turn clockwise until it locks securely.
Step 6: Test by activating the turn signal with the ignition on and observing the amber flash.
Step 7: Reinsert the socket into the housing and turn clockwise to lock.
Step 8: Reseat the rubber grommet completely to seal against moisture.
Rear Turn Signals (1157NA) — Amber
Step 1: Access the rear turn signals from behind the rear fender, underneath the license plate area.
Step 2: Pull back the rubber access grommet on each turn signal housing.
Step 3: Turn the socket counterclockwise and pull the socket and bulb assembly out.
Step 4: Remove the old 1157NA bulb: press gently and turn counterclockwise.
Step 5: Install the new 1157NA amber bulb: push in and turn clockwise to lock.
Step 6: Test before reassembly.
Step 7: Reinsert the socket and turn clockwise.
Step 8: Fully reseat the rubber access grommet.
Tail / Brake Light (1157) — Dual Contact
Step 1: Locate the tail light housing on the rear fender below the tail section.
Step 2: Remove the Phillips screws (typically two) that secure the housing to the fender bracket.
Step 3: Gently pull the housing backward to expose the bulb sockets inside.
Step 4: Identify the 1157 tail/brake socket (center or primary position).
Step 5: Turn the socket counterclockwise and remove it.
Step 6: Remove the old 1157 bulb: push in and turn counterclockwise.
Step 7: Install the new 1157 dual-contact bulb: push in and turn clockwise. Note the offset pins ensure correct orientation.
Step 8: Reinsert the socket into the housing and turn clockwise.
Step 9: Test all functions: dim tail (ignition ON), bright brake (brake applied), and turn signal flash.
Step 10: Reinstall the housing and tighten the Phillips screws.
License Plate Light (W5W)
Step 1: Locate the license plate light above or adjacent to the rear license plate bracket.
Step 2: Remove the Phillips screw or push clip securing the license plate light lens cover.
Step 3: Gently pry the lens cover off to access the bulb socket.
Step 4: Pull the old W5W (T10) wedge bulb straight out of the socket.
Step 5: Push the new W5W bulb into the socket. The wedge base has no polarity — either direction works.
Step 6: Reinstall the lens cover and secure with the screw or push clip.
Step 7: Verify illumination with the ignition on.
Tips, Warnings & Common Mistakes
Headlight Alignment After Replacement
- Park the CB500X upright on level ground, 25 feet from a flat wall.
- Measure the distance from ground to center of the headlight.
- Draw a horizontal reference line on the wall at the measured height and a second line 2 inches below.
- With low beam active, the top of the bright zone should be at or below the lower line.
- Adjust using the adjustment screws accessible behind the headlight bucket.
LED vs. Halogen — Pros and Cons
| Feature | Halogen | LED |
|---|---|---|
| Brightness | Good (standard) | Excellent (up to 3x brighter) |
| Color Temperature | 3200K (warm yellow) | 6000K (cool white daylight) |
| Lifespan | 500-1000 hours | 25,000-50,000 hours |
| Power Draw | Higher (60/55W) | Lower (25-30W equivalent) |
| Heat Generation | High | Low |
| Cost | $10-20 | $30-80 |
| Plug-and-play | Yes (OEM spec) | May need resistors/load modules |
LED Turn Signal Note: Some Honda models monitor turn signal circuit load. LED bulbs may cause rapid flashing. Use model-specific LED-approved bulbs or add load resistors.
Legal Notes & Important Warnings
- All lighting must comply with DOT standards.
- Turn signals must emit amber light in all states.
- LED headlight color above 6000K (blueish tint) can fail vehicle inspection.
- The CB500X has a DC lighting circuit — the headlight is always on when the ignition is on.
- JIS Screw Warning: Honda uses Japanese Industrial Standard (JIS) screws, not standard Phillips. Using a standard Phillips screwdriver can strip screw heads. Invest in a JIS driver or high-quality Phillips.
- Adventure-Touring Note: After off-road or rough-road riding, check that all rubber boots and seals are fully seated. Vibration, dust, and mud can work them loose on adventure touring bikes.
Common Mistakes to Avoid
| Mistake | Consequence | Prevention |
|---|---|---|
| Touching halogen bulb glass | Premature failure from oil hotspots | Use nitrile gloves during handling |
| Skipping the test before reassembly | Need to reopen after finding bad bulb | Test every bulb with ignition first |
| No load resistors on LED turn signals | Hyper-flashing | Add resistors or use Honda-approved LEDs |
| Overtightening housing screws | Cracked bezel or stripped threads | Hand-tight plus a gentle snug |
| Poor headlight beam aim | Safety and legal compliance issues | Check at 25 feet on level ground |
| Wrong bulb wattage | Fuse or wiring damage | Match or stay below OEM spec |
| No dielectric grease | Corroded contacts over time | Apply thin coat to all contacts |
| Rubber boots not reseated | Moisture damage to socket and wiring | Verify boots are fully sealed |
| Using standard Phillips on JIS screws | Stripped screw heads | Use JIS or high-quality Phillips drivers |
| Installing non-amber LED turn signal bulbs | Illegal in some jurisdictions | Only use amber-rated LED turn signal bulbs |
Verification Notes for 2025 Model Year
The 2025 Honda CB500X uses straightforward bulb-based lighting with no integrated LED modules for the main positions. Verify the following against your owner's manual:
| Item | Standard Value | Notes |
|---|---|---|
| Headlight bulb | H4 (60/55W dual filament) | Combined low/high in single bulb |
| Turn signal bulb | 1157NA (amber) | Standard bayonet base |
| Tail/brake bulb | 1157 (dual contact) | Standard bayonet base, offset pins |
| License plate bulb | W5W (T10 wedge) | Pull straight out, no polarity |
To verify all specifications, check your 2025 CB500X owner's manual included with the motorcycle, or access it through the Honda owner portal at owners.honda.com.
This guide was prepared using Honda OEM service manual specifications and established industry bulb cross-references for the CB500X adventure-touring platform. Always verify against your specific owner's manual before performing maintenance.