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Intake Manifold Spacer Set for Honda CB650 RC03 1979–1982 | 16211-426-000
Intake Manifold Spacer Set for Honda CB650 RC03 1979–1982 | 16211-426-000
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Product Overview
Restore a secure and properly sealed connection between the carburetors and engine with this intake manifold spacer and gasket set, designed for compatible 1979–1982 Honda CB650 motorcycles.
This four-piece set replaces original carburetor intake insulators that have become cracked, loose, distorted, corroded, or difficult to seal after years of engine heat, vibration, and fuel-vapor exposure.
A damaged intake connection can allow unmetered air to enter the engine, potentially contributing to unstable idle, difficult starting, hesitation, hanging RPM, uneven cylinder operation, or inconsistent throttle response.
Manufactured from durable metal, these intake joints provide a sturdy replacement when the mounting-hole spacing, overall length, OEM number, intake openings, and carburetor configuration match the original parts.
Product Compatibility
| Brand | Model | Model Code | Year Range | Fitment Notes |
|---|---|---|---|---|
| Honda | CB650 | RC03 | 1979–1982 | Primary listed application |
| Honda | CB650C Custom | RC05 | 1980–1981 | Confirm OEM number and dimensions |
| Honda | CB650SC Nighthawk | RC08 | 1982 | Verify the complete intake configuration |
Honda parts diagrams identify 16211-426-000 as the carburetor insulator on the CB650 cylinder-head assembly. Aftermarket application catalogs commonly list the four-piece replacement set for 1979–1982 CB650 models and selected CB650C applications.
Model designations and intake configurations may vary by sales market. Use the OEM number and original part dimensions as the final fitment references.
OEM Cross-Reference Numbers
Honda
- 16211-426-000
- 16211426000
- 16211 426 000
These formats refer to the same Honda part number. Honda identifies the original component as Insulator, Carburetor.
Your motorcycle uses four intake connections, but each original part may carry the same OEM number.
Specifications
| Specification | Details |
| Product Type | Carburetor Intake Manifold Spacer / Engine Joint |
| OEM Reference | 16211-426-000 |
| Material | Metal |
| Installation-Hole Spacing | Approximately 31 mm / 1.22 in |
| Overall Length | Approximately 37 mm / 1.46 in |
| Engine Type | Four-Cylinder |
| Application | Carburetor-to-Engine Intake Connection |
| Fitment Type | Direct Replacement |
| Vehicle Type | Motorcycle |
| Condition | New |
| Package Quantity | 4 Intake Manifold Joints with Gasket Set |
The 31 mm mounting measurement and 37 mm length correspond with published listings for this metal-style replacement set. Measurement methods may differ, so compare the exact reference points shown in the product images.
Key Features
- CB650-Specific Fitment: Designed for compatible 1979–1982 Honda CB650 motorcycles using OEM 16211-426-000.
- Four-Cylinder Replacement Set: Includes the intake joints required for the motorcycle’s four carburetor connections.
- Durable Metal Construction: Provides a rigid, wear-resistant replacement for damaged or deteriorated original intake components.
- Helps Restore Intake Sealing: Works with the supplied gasket set to reduce unwanted air entering between the carburetors and engine.
- Direct-Replacement Configuration: Installs in the original intake position when the dimensions and mounting layout match.
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Passform-FAQ
Passt dieses Teil zu meinem spezifischen Modell und Baujahr?
This intake manifold spacer set is designed primarily for compatible 1979–1982 Honda CB650 RC03 motorcycles.
Some replacement catalogs also list:
1980–1981 Honda CB650C Custom RC05
Selected 1982 Honda CB650SC Nighthawk applications
For these additional versions, confirm that the original intake insulators use OEM 16211-426-000 and match the 31 mm mounting measurement, 37 mm length, gasket shape, intake openings, and product photos.
Muss ich die OEM-Teilenummer verwenden?
Yes. Matching the complete OEM number is one of the most reliable ways to begin confirming compatibility.
This set replaces:
16211-426-000
16211426000
16211 426 000
These are different formatting versions of the same Honda reference.
The OEM number alone should not be the only check because this is a metal spacer-style replacement for an original carburetor-insulator application. Compare all mounting and intake dimensions before ordering.
Für welche Modelle oder Situationen passt dieser Teil nicht?
This set is not confirmed for:
Honda CB650 models outside the listed application range
Later CB650SC or Nighthawk models using different intake parts
Honda CB750, CB550, or other engine families
Motorcycles using a different intake-insulator OEM number
Applications with different mounting-hole spacing
Carburetors requiring different intake-opening diameters
Motorcycles fitted with aftermarket carburetors
Engine-swapped or heavily modified motorcycles
Applications where the original intake configuration differs from the product photos
Fuel-injected motorcycles without a four-carburetor intake system
Do not assume that all Honda CB-series four-cylinder motorcycles use the same intake joints.
Was sollte ich vor der Bestellung überprüfen?
Before ordering, confirm:
Motorcycle make and complete model
Exact production year
Model code, such as RC03, RC05, or RC08
OEM number 16211-426-000
Four-cylinder carburetor configuration
Approximately 31 mm / 1.22 in installation-hole spacing
Approximately 37 mm / 1.46 in overall length
Carburetor-side opening diameter
Engine-side port dimensions
Flange thickness and shape
Mounting-bolt locations
Gasket dimensions and bolt pattern
Quantity required
Product photos compared with all four original parts
Also inspect the carburetor clamps, vacuum caps, fuel hoses, airbox joints, carburetor synchronization, and cylinder-head sealing surfaces before reassembly.