Headlight Bucket & H4 Bulb Kit | Honda CB175 / CB200 / CB350 / CB360 / CB450
Old Honda headlights have three settings: dim, dimmer, and off. This complete 6.25-inch metal headlight bucket kit replaces the weak factory sealed beam and fragile plastic bucket with a modern, all-metal assembly and a replaceable H4 bulb—a significant upgrade in brightness, durability, and serviceability for Honda CB175, CB200, CB350, CB360, and early CB450 twins.
Why You Need This
The factory sealed beam headlights on vintage Honda twins are weak, and finding a replacement is nearly impossible. Honda used a unique 6.25-inch lens diameter on these models—not an off-the-shelf size—so sourcing a clean used lens means settling for another dim sealed beam. When a filament burns out in the factory unit, you have to replace the entire lens and body assembly.
This kit solves all of those problems. The new metal bucket accepts a standard H4 bulb, so future replacements are a quick swap—no more hunting for sealed beams. The included 35W/35W halogen bulb is brighter than the original while staying within the charging system's limits. Want even more light? An LED H4 upgrade is available at checkout, drawing less power while producing significantly more light.
The bucket is proportionally correct for the original headlight mounting points and gauges. It fits the factory headlight ears and mounts without modification on most models, and it looks right on the motorcycle—not oversized or oddly shaped like many universal aftermarket buckets.
Specifications
| Spec | Detail |
|---|
| Replaces OEM Part Numbers | 33100-292-674, 33120-292-673, 33100-286-672, 33101-286-670, 33120-283-000, 33100-283-000, 33120-333-670, 33100-369-671 |
| Fits Models | CB175 (1969–1973), CL175 (1969–1973), CB200 (1973–1976), CL200 (1974), CB350 (1968–1973), CL350 (1968–1973), CB360 (1974–1976), CL360 (1974–1975), CJ360 (1976–1977), CB450 K1–K4 (1968–1971), CL450 (1968–1974) |
| Lens Diameter | 6.25 inches (159 mm) |
| Bucket Material | Metal (replaces factory plastic) |
| Bulb Type | H4 halogen, 35W/35W (high/low beam) — LED upgrade available |
| Color Options | Black with chrome trim ring, or full chrome |
| Sold As | Complete kit (bucket + lens + bulb + pigtail + mounting hardware + spacer washers) |
| Mounting Bolt Thread | M10 x 1.25 (fine pitch) |
Important: Do NOT use a 55W or 60W automotive H4 bulb—it will overtax the charging system on these Honda twins. The charging systems are anemic, and 35 watts is the maximum headlight draw they are designed to support.
Model-Specific Notes
- CB175 / CL175: Early models originally used a smaller 5.25-inch headlight bucket. This 6.25-inch replacement bucket can be installed in its place as a direct upgrade.
- CB360 / CL360 / CJ360: These models use a unique one-piece headlight bracket that differs from the headlight ears found on the CB350 and CB450. The new bucket fits but requires a bracket modification—trim the arch at the top of the mounting bracket to allow proper headlight aim adjustment. Use the included spacer washers (three on each side) between the bucket and bracket. See installation steps below for details.
- CB350 / CL350 / CB450 K1–K4 / CL450: These models use separate left and right headlight ears mounted on the fork tubes. No bracket modification needed—the bucket mounts directly to the factory ears.
- CJ360 owners wanting lens only: If your factory bucket is in good condition and you only need the lens and bulb, see our 6.25-inch Headlight Lens & H4 Bulb Kit instead. Note: the lens-only kit does not fit the CB360/CL360 factory bucket—only the CJ360 bucket.
What's in the Kit
- 6.25-inch metal headlight bucket (black with chrome trim ring, or full chrome)
- Glass lens with H4 socket
- 35W/35W H4 halogen bulb (or LED if selected at checkout)
- 3-prong electrical pigtail connector
- Mounting bolts and hardware
- Spacer washers (for CB360/CL360/CJ360 bracket fitment)
Installation
Difficulty: Beginner (CB175/CB350/CB450) / Intermediate (CB360/CL360/CJ360 — requires bracket trimming)
Tools needed: Basic metric hand tools, wire cutters and crimp/splice tools (if upgrading from bullet connectors to H4 pigtail). CB360/CL360 also needs a hacksaw, file, bench vise, and touch-up paint.
- Remove the trim ring screws and swing the ring out from the bottom (the top has a tang that hooks into a notch in the bucket). Remove the sealed beam assembly and unplug the connector.
- Identify your headlight connector type: if your motorcycle has a three-prong H4-style connector, unplug and reuse it. If it has three separate wires with bullet connectors, use the included H4 pigtail—solder the connections for a more reliable result than crimp connectors.
- Locate the specialty grounding nut(s) inside the bucket with green wires attached. Unbolt and save them—you will reinstall them on the new bucket's mounting bolts to maintain the factory ground path for the turn signals.
- Remove the original plastic bucket from the headlight brackets.
- CB360/CL360/CJ360 only: Remove the headlight bracket from the motorcycle. Clamp it in a vise and use a hacksaw to cut away the thin arch at the top of the bracket between the upper mounting holes. File the cut edges smooth and touch up with enamel paint to prevent rust. Reinstall the bracket.
- Feed the wiring harness through the large rear opening of the new bucket. Route and reconnect all wires, including turn signal leads.
- Mount the bucket to the headlight brackets. For CB360/CL360/CJ360, use the included spacer washers—one under each bolt head and three between the bucket and bracket on each side.
- Reinstall the grounding nut connector(s) on the new mounting bolts. For separate left/right headlight ears (CB175/CB350/CB450), use one on each side. For the CB360 one-piece bracket, one is sufficient.
- Install the H4 bulb (or LED upgrade) into the lens, plug in the pigtail connector, and install the lens assembly. Engage the top tang first, then swing the bottom in. If you feel resistance, rearrange wires inside the bucket—do not force the lens.
- Test low beam, high beam, and turn signals before final tightening. Aim the headlight after riding—loosen the side bolts slightly, adjust up or down, and retighten.
Missing grounding nuts? If the original grounding nut connectors are missing and you are using stock turn signals, make a ground jumper: ring terminal on one end (bolted to the headlight mounting bolt with an M10 x 1.25 nut) and a male bullet connector on the other end tapped into the green ground circuit inside the bucket.
High beam indicator light: If your motorcycle originally had an indicator light mounted at the top of the headlight bucket, you can drill a hole in the new bucket to transplant it, install a universal replacement, or run without it.
Our headlight bucket upgrade video walks through the complete installation on a Honda CB360, including the bracket modification, wiring, grounding connections, and LED bulb upgrade.
Frequently Asked Questions
Can I use a 55W or 60W H4 bulb for a brighter light?
No. The charging systems on these vintage Honda twins are limited to 35 watts maximum for the headlight circuit. A higher-wattage bulb will overtax the system—the alternator cannot keep the battery charged, especially at lower RPMs. Use the included 35W halogen or upgrade to our LED H4 bulb, which produces more light while drawing less power than even the 35W halogen.
Does this bucket fit the CB450 K5, K6, or K7?
No. The CB450 K5 and later models (including the CB500T) switched to a larger 7-inch headlight bucket. This 6.25-inch kit fits the CB450 K1 through K4 and all CL450 models only. For the CB450 K5 and later or CB500T, see our 7-inch headlight bucket.
Do I need to modify anything on my CB350 to install this?
No bracket modification is needed on the CB350 or CL350. The bucket mounts directly to the factory headlight ears on the fork tubes. If your original connector has three separate bullet-style wires (common on CB350s), you will need to splice in the included H4 pigtail connector—soldering is recommended over crimp connectors.
Will the factory turn signals still work with this bucket?
Yes, as long as you reinstall the specialty grounding nut connectors from the original bucket onto the new mounting bolts. The turn signals ground through the headlight bracket, and these nuts provide that ground path. If the original nuts are missing, you can make a simple ground jumper with a ring terminal and a bullet connector tapped into the green ground circuit.
What is the difference between this full bucket kit and the lens-only kit?
This kit includes the complete headlight bucket, lens, bulb, pigtail, and all mounting hardware—a full replacement for both the bucket and sealed beam. The lens-only kit replaces just the sealed beam inside your existing factory bucket with an H4 lens and bulb, keeping the original bucket. The lens-only kit fits the CB175, CB200, CB350, CJ360, and CB450 K1–K4 factory buckets, but does not fit the CB360/CL360 factory bucket.
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Last updated: March 2026
