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Honda CB400 CX500 XL250 XL350 Fuel Petcock 16951-385-703

Honda CB400 CX500 XL250 XL350 Fuel Petcock - Replaces Honda OEM 16951-385-703

$15.24
29-0543
Honda CB Motorcycle Parts Honda CB400 Parts Honda CB400A Parts Honda CB400T Parts Honda CB400T1 Parts Honda CB400T2 Parts Honda CX Motorcycle Parts Honda CX500 Parts Honda CX500C Custom Parts Honda CX500D Deluxe Parts Honda XL Motorcycle Parts Honda XL250 Parts Honda XL250S Parts Honda XL350 Parts Motorcycle Air Filters, Petcocks & Fuel Parts Motorcycle Petcocks, Fuel Taps & Adaptor Plates Vintage Honda Motorcycle Parts
Honda CB400 CX500 XL250 XL350 Fuel Petcock - Replaces Honda OEM 16951-385-703. This fuel petcock controls fuel flow from the tank to the carburetor...
In stock
Honda CB550 CB400 CB350 CB450 Front Fuel Tank Rubber Cushion 17611-KE8-000

Honda CB550 CB400 CB350 CB450 Front Fuel Tank Rubber Cushion - Replaces Honda OEM 17611-KE8-000

$5.50
27-5520
Honda CB Motorcycle Parts Honda CB1100 Parts Honda CB125 Parts Honda CB125S Parts Honda CB125TT Parts Honda CB250 Parts Honda CB350 Parts Honda CB350F Parts Honda CB350G Parts Honda CB350K Parts Honda CB360 Parts Honda CB360K Parts Honda CB360T Parts Honda CB400 Parts Honda CB400A Parts Honda CB400F Parts Honda CB400T Parts Honda CB400T1 Parts Honda CB400T2 Parts Honda CB450 Parts Honda CB450T Hawk Parts Honda CB50 Parts — CB50R Applications Honda CB550 Parts Honda CB550SC Parts Honda CB600 Parts Honda CB600F Parts Honda CB650 Parts Honda CB650C Parts Honda CB650SC Parts Honda CB700 Parts Honda CB700SC Parts Honda CJ Motorcycle Parts Honda CJ360T Parts Honda CL Scrambler Motorcycle Parts Honda CL350 Scrambler Parts Honda CL350K Scrambler Parts Honda CL360 Parts Honda CL360K Parts Honda CM Motorcycle Parts Honda CM185 Parts Honda CM185T Parts Honda CM200T Parts Honda CM200T Parts Honda CM250 Parts Honda CM400 Parts Honda CM400E Parts Honda CRF Motorcycle Parts Honda CRF1000 Africa Twin Parts Honda CX Motorcycle Parts Honda CX500 Parts Honda CX500D Deluxe Parts Honda CX500TC Turbo Parts Honda CX650 Parts Honda CX650T Turbo Parts Honda FT500 Ascot Motorcycle Parts Honda FT500 Parts Honda GL500 Silver Wing Parts Honda GL500I Parts Honda GL650 Silver Wing Parts Honda GL650I Parts Honda Gold Wing Motorcycle Parts Honda VF Magna, Sabre & Interceptor Parts Honda VF750 Parts Honda VF750S Parts Honda VT Motorcycle Parts Honda VT1300 Parts Honda VT500 Parts Honda VT500C Parts Honda VT500FT Parts Honda VT600 Parts Honda VT600C Parts Honda VT750 Parts Honda VT750C Parts Honda VT750CD Parts Honda VT750CD2 Parts Honda VT750DC Parts Honda XL Motorcycle Parts Honda XL250 Parts Honda XL250S Parts Honda XL350 Parts Honda XR Motorcycle Parts Honda XR250 Parts Motorcycle Air Filters, Petcocks & Fuel Parts Motorcycle Bodywork, Seats, Mirrors & Controls Motorcycle Gas Tank Caps, Seals & Mounting Parts Motorcycle Mounting Rubbers, Grommets & Cushions Vintage Honda Motorcycle Parts
Honda CB550 CB400 CB350 CB450 Front Fuel Tank Rubber Cushion - Replaces Honda OEM 17611-KE8-000. This fuel tank rubber cushion supports the tank at...
In stock
Honda CB550 CB400 CB350 CB450 Fuel Tank Front Rubber Cushion Genuine 17611-KE8-000

Honda CB550 CB400 CB350 CB450 Fuel Tank Front Rubber Cushion - Genuine Honda OEM 17611-KE8-000

$17.39
99-5145
Honda CB Motorcycle Parts Honda CB1100 Parts Honda CB125 Parts Honda CB125S Parts Honda CB125TT Parts Honda CB250 Parts Honda CB350 Parts Honda CB350F Parts Honda CB350G Parts Honda CB350K Parts Honda CB360 Parts Honda CB360K Parts Honda CB360T Parts Honda CB400 Parts Honda CB400A Parts Honda CB400F Parts Honda CB400T Parts Honda CB400T1 Parts Honda CB400T2 Parts Honda CB450 Parts Honda CB450T Hawk Parts Honda CB50 Parts — CB50R Applications Honda CB550 Parts Honda CB550SC Parts Honda CB600 Parts Honda CB600F Parts Honda CB650 Parts Honda CB650C Parts Honda CB650SC Parts Honda CB700 Parts Honda CB700SC Parts Honda CJ Motorcycle Parts Honda CJ360T Parts Honda CL Scrambler Motorcycle Parts Honda CL350 Scrambler Parts Honda CL350K Scrambler Parts Honda CL360 Parts Honda CL360K Parts Honda CM Motorcycle Parts Honda CM185 Parts Honda CM185T Parts Honda CM200T Parts Honda CM200T Parts Honda CM250 Parts Honda CM400 Parts Honda CM400E Parts Honda CRF Motorcycle Parts Honda CRF1000 Africa Twin Parts Honda CX Motorcycle Parts Honda CX500 Parts Honda CX500D Deluxe Parts Honda CX500TC Turbo Parts Honda CX650 Parts Honda CX650T Turbo Parts Honda FT500 Ascot Motorcycle Parts Honda FT500 Parts Honda GL500 Silver Wing Parts Honda GL500I Parts Honda GL650 Silver Wing Parts Honda GL650I Parts Honda Gold Wing Motorcycle Parts Honda VF Magna, Sabre & Interceptor Parts Honda VF750 Parts Honda VF750S Parts Honda VT Motorcycle Parts Honda VT1300 Parts Honda VT500 Parts Honda VT500C Parts Honda VT500FT Parts Honda VT600 Parts Honda VT600C Parts Honda VT750 Parts Honda VT750C Parts Honda VT750CD Parts Honda VT750CD2 Parts Honda VT750DC Parts Honda XL Motorcycle Parts Honda XL250 Parts Honda XL250S Parts Honda XL350 Parts Honda XR Motorcycle Parts Honda XR250 Parts Motorcycle Air Filters, Petcocks & Fuel Parts Motorcycle Bodywork, Seats, Mirrors & Controls Motorcycle Gas Tank Caps, Seals & Mounting Parts Motorcycle Mounting Rubbers, Grommets & Cushions Vintage Honda Motorcycle Parts
Honda CB550 CB400 CB350 CB450 Fuel Tank Front Rubber Cushion Genuine OEM 17611-KE8-000. This rubber mounting cushion isolates the listed mounted component from vibration...
In stock
Honda CB750 CB550 CB400 CX500 Tank Cap 17620-399-010

Honda CB750 CB550 CB400 CX500 Tank Cap - Replaces Honda OEM 17620-399-010

$76.59
73-0079
Honda CB Motorcycle Parts Honda CB400 Parts Honda CB400A Parts Honda CB400F Parts Honda CB400T1 Parts Honda CB400T2 Parts Honda CB550 Parts Honda CB550F Parts Honda CB550K Parts Honda CB750 Parts Honda CB750A Hondamatic Parts (1976–1978) Honda CB750F Super Sport Parts (1975–1982) Honda CB750K Parts (1969–1982) Honda CM Motorcycle Parts Honda CM185 Parts Honda CM185T Parts Honda CM200T Parts Honda CM200T Parts Honda CM400 Parts Honda CM400E Parts Honda CX Motorcycle Parts Honda CX500 Parts Honda CX500D Deluxe Parts Motorcycle Air Filters, Petcocks & Fuel Parts Motorcycle Gas Tank Caps, Seals & Mounting Parts Vintage Honda Motorcycle Parts
Honda CB750 CB550 CB400 CX500 Tank Cap - Replaces Honda OEM 17620-399-010. This fuel tank cap closes the filler neck and helps seal the...
In stock
Honda CB750 CB550 CB400 CB350 Tank Cap Rubber Seal 17631-329-003

Honda CB750 CB550 CB400 CB350 Tank Cap Rubber Seal - Replaces Honda OEM 17631-329-003

$7.62
20-0097
Honda CA Motorcycle Parts Honda CA160 Parts Honda CA175 Parts Honda CB Motorcycle Parts Honda CB100 Parts Honda CB100K Parts Honda CB125 Parts Honda CB125S Parts Honda CB175 Parts Honda CB175K Parts Honda CB350 Parts Honda CB350K Parts Honda CB400 Parts Honda CB400A Parts Honda CB400F Parts Honda CB400T1 Parts Honda CB400T2 Parts Honda CB450 Parts Honda CB450K DOHC Twin Parts Honda CB550 Parts Honda CB550F Parts Honda CB550K Parts Honda CB72 Parts Honda CB750 Parts Honda CB750A Hondamatic Parts (1976–1978) Honda CB750F Super Sport Parts (1975–1982) Honda CB750K Parts (1969–1982) Honda CB77 Parts Honda CL Scrambler Motorcycle Parts Honda CL100 Parts Honda CL100K Parts Honda CL100S Parts Honda CL125 Parts Honda CL125S Parts Honda CL175 Parts Honda CL175K Parts Honda CL350 Scrambler Parts Honda CL350K Scrambler Parts Honda CL450 Parts Honda CL450K Parts Honda CL70 Parts Honda CL72 Parts Honda CL77 Parts Honda CL90 Parts Honda CM Motorcycle Parts Honda CM185 Parts Honda CM185T Parts Honda CM200T Parts Honda CM200T Parts Honda CM400 Parts Honda CM400E Parts Honda CT Motorcycle Parts Honda CT125 Parts Honda CX Motorcycle Parts Honda CX500 Parts Honda CX500D Deluxe Parts Honda MR Elsinore Motorcycle Parts Honda MR175 Elsinore Motorcycle Parts Honda MR250 Elsinore Motorcycle Parts Honda S90 & S65 Parts Honda SL Motorcycle Parts Honda SL100 Parts Honda SL125 Parts Honda SL175 Parts Honda SL70 Parts Honda SL90 Parts Honda XL Motorcycle Parts Honda XL100 / XL100S Parts Honda XL125 Parts Honda XL175 Parts Honda XL185 Parts Honda XL185S Parts Honda XL250 Parts Honda XL250S Parts Honda XL350 Parts Honda XL70 Parts Honda XL75 Parts Honda XL80 Parts Honda XL80S Parts Honda XR Motorcycle Parts Honda XR75 Parts Honda XR80 Parts Motorcycle Air Filters, Petcocks & Fuel Parts Motorcycle Gas Tank Caps, Seals & Mounting Parts Vintage Honda Motorcycle Parts
Honda CB750 CB550 CB400 CB350 Tank Cap Rubber Seal - Replaces Honda OEM 17631-329-003. This seal retains fluid or excludes dirt at the specified...
In stock
Honda CB450 CB400 Stock Type Air Filter 17211-413-000

Honda CB450 CB400 Stock Type Air Filter - Replaces Honda OEM 17211-413-000

$17.46
15-0048
Honda CB Motorcycle Parts Honda CB400 Parts Honda CB400A Parts Honda CB400T Parts Honda CB400T1 Parts Honda CB400T2 Parts Honda CB450 Parts Honda CB450T Hawk Parts Motorcycle Air Filters, Airbox Seals & Clamps Motorcycle Air Filters, Petcocks & Fuel Parts Vintage Honda Motorcycle Parts
Honda CB450 CB400 Stock Type Air Filter - Replaces Honda OEM 17211-413-000. This stock-style air filter element fits the factory airbox to trap dirt...

About the Honda CB400A

Repair parts for the 400 twin with Honda’s Hondamatic transmission.

Honda Motorcycle Logo

The CB400A brought Honda’s Hondamatic transmission to the 400 twin. A torque converter works with a two-speed semi-automatic gearbox and foot-operated range selection. The motorcycle also has a parking-brake system. Those features give the A its own transmission and control requirements alongside the manual Hawk twins.

Build a repair order around the Hondamatic

The service parts below cover four distinct jobs on a 1978 CB400A: engine sealing, front master-cylinder repair, rear brake renewal and fuel-tap replacement. Some also fit specific manual-Hawk years. For converter or transmission work, identify the individual gasket or seal needed and compare it with the package contents.

Know your motorcycle before choosing partsHonda CB400A Hondamatic and manual-Hawk differences

Shared twin-engine ancestry does not remove the Hondamatic’s distinct transmission and control requirements.

1978 Hondamatic

CB400A transmission and controls

The A uses a torque converter, two-speed semi-automatic transmission and parking-brake system.

Parts checkpoint: Choose an explicit CB400A application for transmission parts.

Manual Hawk twins

CB400T, Hawk I and Hawk II

Individual gaskets or chassis parts can list both A and T applications. Conventional Hawk clutch plates still need separate verification for a Hondamatic.

Parts checkpoint: Treat shared coverage as specific to the part listed.

Honda CB400T Hawk parts

Four-cylinder alternative

CB400F Four

The original Four has a separate engine and carburetor application from the CB400A twin.

Parts checkpoint: Use the Four’s collection if that is the engine family you have.

Honda CB400F Four parts

Frame, engine & fitted componentsHonda CB400A identification checklist

Use these details to match your motorcycle and any replacement assemblies before ordering.

  1. Record the complete frame/VIN, model year and engine number.
  2. Identify the Hondamatic engine and its range-selection and parking-brake controls; photograph them if parts are missing.
  3. Read the carburetor identification before ordering fuel-system repair parts.
  4. Identify the front master cylinder, front caliper and rear drum separately; record the tank mounting and outlet arrangement for a fuel tap.
Need help identifying your CB400A?

Contact PartsNMore with clear photos of the frame/VIN, engine number and the part’s markings, plus any known component changes.

Honda CB400A parts questions

Is the Honda CB400A a fully automatic motorcycle?
The CB400A uses a torque converter with a two-speed semi-automatic transmission and foot-selected ranges. It differs from the manual-clutch Hawk, so transmission and control parts need an explicit Hondamatic application.
What parts are available here for a 1978 CB400A?
The repair links include a 1978 CB400A engine gasket set, front master-cylinder rebuild kit, rear brake shoes and replacement fuel petcock. Check each listing’s contents and match any components that have been replaced.
Is the CB400A handlebar cable a manual clutch cable?
The Hondamatic has a parking-brake control and cable. Identify the control’s function before replacing a cable or changing handlebars; a manual-Hawk clutch cable is not an automatic substitute.
Does the CB400A front master-cylinder kit also rebuild the caliper?
No. The linked kit repairs the front master cylinder on the listed 1978 CB400A application. The caliper and rear drum brake use separate service parts.

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