100% tariff-free shipping to usa & canada
×

Browse parts

Change model or year

Choose your Honda CM400 model

Store rated 5.0/5 Read reviews (80)80 store reviews
In stock
Honda CB450 CB400 GL1000 GL1100 Cylinder Head Intake Boot O-Rings (set of 4) 91301-371-005

Honda CB450 CB400 GL1000 GL1100 Cylinder Head Intake Boot O-Rings (Set/4)

$7.62
48-5044
Honda CB Motorcycle Parts Honda CB400 Parts Honda CB400A Parts Honda CB400T Parts Honda CB400T2 Parts Honda CB450 Parts Honda CB450SC Nighthawk Parts Honda CB450T Hawk Parts Honda CM Motorcycle Parts Honda CM400 Parts Honda CM400A Parts Honda CM400C Parts Honda CM400E Parts Honda CM400T Parts Honda CM450 Parts Honda CM450A Parts Honda CM450C Parts Honda CM450E Parts Honda CMX Rebel Motorcycle Parts Honda CMX450 Rebel Parts Honda CMX450C Parts Honda CX Motorcycle Parts Honda CX500 Parts Honda CX500C Custom Parts Honda CX500D Deluxe Parts Honda CX500TC Turbo Parts Honda CX650 Parts Honda CX650C Custom Parts Honda CX650T Turbo Parts Honda GL1000 Gold Wing Parts Honda GL1000LTD Limited Parts Honda GL1100 Gold Wing Parts Honda GL1100A Parts Honda GL1100I Parts Honda GL500 Silver Wing Parts Honda GL500I Parts Honda GL650 Silver Wing Parts Honda GL650I Parts Honda Gold Wing Motorcycle Parts Motorcycle Carb Intake Boots, Holders & Clamps Motorcycle Carburetor Parts & Rebuild Kits Vintage Honda Motorcycle Parts
Honda CB450 CB400 GL1000 GL1100 Cylinder Head Intake Boot O-Rings (Set/4) - Replaces Honda OEM 91301-371-005. This intake O-ring seals the intake boot or...
In stock
Honda CB750 CB450 CB400 CB650 Air Cut Off Valve 16048-429-771

Honda CB750 CB450 CB400 CB650 Air Cut Off Valve - Replaces Honda OEM 16048-429-771

$25.90
20-4020
Best-Selling Vintage Motorcycle Parts Honda CB Motorcycle Parts Honda CB400 Parts Honda CB400T Parts Honda CB450 Parts Honda CB450SC Nighthawk Parts Honda CB450T Hawk Parts Honda CB650 Parts Honda CB650C Parts Honda CB750 Parts Honda CB750C Custom Parts (1980–1982) Honda CB750F Super Sport Parts (1975–1982) Honda CB750K Parts (1969–1982) Honda CB750SC & Nighthawk 750 Parts Honda CB900 Parts Honda CB900C Parts Honda CB900F Parts Honda CM Motorcycle Parts Honda CM400 Parts Honda CM400A Parts Honda CM400C Parts Honda CM400E Parts Honda CM400T Parts Honda CM450 Parts Honda CM450E Parts Honda CX Motorcycle Parts Honda CX500 Parts Honda CX500C Custom Parts Honda CX500D Deluxe Parts Honda GL1100 Gold Wing Parts Honda GL1100A Parts Honda GL1100I Parts Honda GL500 Silver Wing Parts Honda GL500I Parts Honda Gold Wing Motorcycle Parts Honda XL Motorcycle Parts Honda XL250 Parts Honda XL250S Parts Honda XL500 Parts Honda XL500S Parts Honda XR Motorcycle Parts Honda XR250 Parts Honda XR250R Parts Honda XR500 Parts Honda XR500R Parts Honda XR600 Parts Honda XR600R Parts Motorcycle Carburetor Air Cut-Off Valves Motorcycle Carburetor Parts & Rebuild Kits Vintage Honda Motorcycle Parts
Honda CB750 CB450 CB400 CB650 Air Cut Off Valve - Replaces Honda OEM 16048-429-771. This air cut-off valve supports the carburetor’s deceleration and idle...
In stock
Honda Motorcycle ATV Float Needle 16155-413-751

Honda Motorcycle ATV Float Needle - Replaces Honda OEM 16155-413-751

$8.73
48-5011
Honda ATC Three-Wheeler Parts Honda ATC185 Parts Honda ATC200ES Parts Honda ATC200X Parts Honda ATC250SX Parts Honda ATC350X Parts Honda ATV & ATC Parts Honda CB Motorcycle Parts Honda CB1000 Parts Honda CB1000C Parts Honda CB1100 Parts Honda CB1100F Parts Honda CB125 Parts Honda CB125S Parts Honda CB250 Parts Honda CB400 Parts Honda CB400T Parts Honda CB450 Parts Honda CB450SC Nighthawk Parts Honda CB450T Hawk Parts Honda CB550 Parts Honda CB550SC Parts Honda CB650 Parts Honda CB650C Parts Honda CB650SC Parts Honda CB700 Parts Honda CB700SC Parts Honda CB750 Parts Honda CB750C Custom Parts (1980–1982) Honda CB750F Super Sport Parts (1975–1982) Honda CB750K Parts (1969–1982) Honda CB750SC & Nighthawk 750 Parts Honda CB900 Parts Honda CB900C Parts Honda CB900F Parts Honda CBR Motorcycle Parts Honda CBR600F Parts Honda CBR600F3 Parts Honda CBR900RR Parts Honda CBX Motorcycle Parts Honda CBX250 Parts Honda CBX550F Parts Honda CM Motorcycle Parts Honda CM250 Parts Honda CM400 Parts Honda CM400A Parts Honda CM400E Parts Honda CM400T Parts Honda CM450 Parts Honda CM450E Parts Honda CMX Rebel Motorcycle Parts Honda CMX250 Rebel Parts Honda CMX450 Rebel Parts Honda CX Motorcycle Parts Honda CX500 Parts Honda FT500 Ascot Motorcycle Parts Honda GL1500 Gold Wing & Valkyrie Parts Honda GL1500C Valkyrie Parts Honda GL1500CD Valkyrie Parts Honda GL1500CF Valkyrie Interstate Parts Honda GL1500CT Valkyrie Tourer Parts Honda Gold Wing Motorcycle Parts Honda NX Motorcycle Parts Honda TRX ATV Parts Honda TRX250 Parts Honda TRX250X Parts Honda TRX300 Parts Honda TRX300EX Parts Honda TRX300FW Parts Honda TRX400FW Parts Honda VFR Motorcycle Parts Honda VFR750 Interceptor Parts Honda VFR750F Parts Honda XL Motorcycle Parts Honda XL250 Parts Honda XL250R Parts Honda XL500 Parts Honda XL500R Parts Honda XR Motorcycle Parts Honda XR250 Parts Honda XR250L Parts Motorcycle Carburetor Float Needles & Seats Motorcycle Carburetor Parts & Rebuild Kits Vintage Honda Motorcycle Parts
Honda Motorcycle ATV Float Needle - Replaces Honda OEM 16155-413-751. This float needle and seat control fuel entry into the carburetor float bowl. Replace...
In stock
Honda CB750 CB450 CB400 CB650 Carb Float 16013-413-851

Honda CB750 CB450 CB400 CB650 Carb Float - Replaces Honda OEM 16013-413-851

$26.64
20-6507
Honda CB Motorcycle Parts Honda CB1000 Parts Honda CB1000C Parts Honda CB1100 Parts Honda CB1100F Parts Honda CB400 Parts Honda CB400T Parts Honda CB450 Parts Honda CB450SC Nighthawk Parts Honda CB450T Hawk Parts Honda CB650 Parts Honda CB650C Parts Honda CB650SC Parts Honda CB750 Parts Honda CB750C Custom Parts (1980–1982) Honda CB750F Super Sport Parts (1975–1982) Honda CB750K Parts (1969–1982) Honda CB750SC & Nighthawk 750 Parts Honda CB900 Parts Honda CB900C Parts Honda CB900F Parts Honda CM Motorcycle Parts Honda CM250 Parts Honda CM400 Parts Honda CM400A Parts Honda CM400C Parts Honda CM400E Parts Honda CM400T Parts Honda CM450 Parts Honda CM450A Parts Honda CM450C Parts Honda CM450E Parts Honda CX Motorcycle Parts Honda CX500 Parts Honda CX500C Custom Parts Honda CX500D Deluxe Parts Honda CX650 Parts Honda CX650C Custom 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 Motorcycle Carburetor Floats & Float Pins Motorcycle Carburetor Parts & Rebuild Kits Vintage Honda Motorcycle Parts
Honda CB750 CB450 CB400 CB650 Carb Float - Replaces Honda OEM 16013-413-851. This carburetor float controls fuel level in the carburetor float bowl. Use...
In stock
Honda CB750 CB650 CB900 CB1100 Carb Rebuild Kit

Honda CB750 CB650 CB900 CB1100 Carb Rebuild Kit

$24.05
48-1402
Honda CB Motorcycle Parts Honda CB1100 Parts Honda CB1100F Parts Honda CB650 Parts Honda CB750 Parts Honda CB750C Custom Parts (1980–1982) Honda CB750F Super Sport Parts (1975–1982) Honda CB750K Parts (1969–1982) Honda CB900 Parts Honda CB900C Parts Honda CB900F Parts Honda CM Motorcycle Parts Honda CM400 Parts Honda CM400A Parts Honda CM400E Parts Honda CM400T Parts Honda CM450 Parts Honda CM450A Parts Honda CM450E Parts Honda CX Motorcycle Parts Honda CX500 Parts Honda CX500C Custom Parts Motorcycle Carburetor Parts & Rebuild Kits Motorcycle Carburetor Rebuild & Repair Kits Vintage Honda Motorcycle Parts
Honda CB750 CB650 CB900 CB1100 Carb Rebuild Kit. This carburetor rebuild kit supplies the gaskets, O-rings, float-valve parts, and small service pieces needed to...
In stock
Honda CB450 CB400 CB900 GL1100 Carb Pump Diaphragm 16021-413-751

Honda CB450 CB400 CB900 GL1100 Carb Pump Diaphragm - Replaces Honda OEM 16021-413-751

$25.16
20-9041
Honda CB Motorcycle Parts Honda CB400 Parts Honda CB400T Parts Honda CB450 Parts Honda CB450SC Nighthawk Parts Honda CB450T Hawk Parts Honda CB900 Parts Honda CB900F Parts Honda CM Motorcycle Parts Honda CM250 Parts Honda CM400 Parts Honda CM400A Parts Honda CM400C Parts Honda CM400E Parts Honda CM400T Parts Honda CM450 Parts Honda CM450C Parts Honda CM450E Parts Honda CX Motorcycle Parts Honda CX500 Parts Honda CX500C Custom Parts Honda CX500D Deluxe Parts Honda GL1100 Gold Wing Parts Honda GL1100A Parts Honda GL1100I Parts Honda GL500 Silver Wing Parts Honda GL500I Parts Honda Gold Wing Motorcycle Parts Motorcycle Carburetor Accelerator Pump Parts Motorcycle Carburetor Parts & Rebuild Kits Vintage Honda Motorcycle Parts
Honda CB450 CB400 CB900 GL1100 Carb Pump Diaphragm - Replaces Honda OEM 16021-413-751. This carburetor diaphragm operates or seals the specified vacuum, slide, or...
In stock
Honda CB750 CB450 CB400 CB650 Float Bowl Gasket

Honda CB750 CB450 CB400 CB650 Float Bowl Gasket

$9.77
20-8031
1979 Honda CB750L Limited Edition Parts Honda CB Motorcycle Parts Honda CB1000 Parts Honda CB1000C Parts Honda CB1100 Parts Honda CB1100F Parts Honda CB400 Parts Honda CB400A Parts Honda CB400T Parts Honda CB450 Parts Honda CB450SC Nighthawk Parts Honda CB650 Parts Honda CB650C Parts Honda CB650SC Parts Honda CB750 Parts Honda CB750C Custom Parts (1980–1982) Honda CB750F Super Sport Parts (1975–1982) Honda CB750K Parts (1969–1982) Honda CB750SC & Nighthawk 750 Parts Honda CB900 Parts Honda CB900C Parts Honda CB900F Parts Honda CBX Motorcycle Parts Honda CBX1050 Parts Honda CM Motorcycle Parts Honda CM250 Parts Honda CM400 Parts Honda CM400A Parts Honda CM400E Parts Honda CM400T Parts Honda CM450 Parts Honda CM450E Parts Honda CX Motorcycle Parts Honda CX500 Parts Honda FT500 Ascot Motorcycle Parts Honda GL1100 Gold Wing Parts Honda GL500 Silver Wing Parts Honda GL650 Silver Wing Parts Honda GL650I Parts Honda Gold Wing Motorcycle Parts Motorcycle Carburetor Float Bowl Gaskets Motorcycle Carburetor Parts & Rebuild Kits Vintage Honda Motorcycle Parts
Honda CB750 CB450 CB400 CB650 Float Bowl Gasket. This float bowl gasket seals the carburetor bowl to the carburetor body. Replace a flattened, torn,...
In stock
Honda CB450 CB400 CM400 CM450 Carb Holder with O-Ring 16211-447-670

Honda CB450 CB400 CM400 CM450 Carb Holder with O-Ring - Replaces Honda OEM 16211-447-670

$24.42
33-0017
Honda CB Motorcycle Parts Honda CB400 Parts Honda CB400T Parts Honda CB450 Parts Honda CB450SC Nighthawk Parts Honda CB450T Hawk Parts Honda CM Motorcycle Parts Honda CM400 Parts Honda CM400C Parts Honda CM400E Parts Honda CM400T Parts Honda CM450 Parts Honda CM450C Parts Honda CM450E Parts Motorcycle Carb Intake Boots, Holders & Clamps Motorcycle Carburetor Parts & Rebuild Kits Vintage Honda Motorcycle Parts
Honda CB450 CB400 CM400 CM450 Carb Holder with O-Ring - Replaces Honda OEM 16211-447-670. This carburetor intake holder connects the carburetor to the cylinder...
In stock
Honda CB750 CB450 CB400 CB650 Air Cut Off Valve With Cover 16048-429-771

Honda CB750 CB450 CB400 CB650 Air Cut Off Valve With Cover - Replaces Honda OEM 16048-429-771

$32.78
48-9029
Honda CB Motorcycle Parts Honda CB400 Parts Honda CB400T Parts Honda CB450 Parts Honda CB450SC Nighthawk Parts Honda CB450T Hawk Parts Honda CB650 Parts Honda CB650C Parts Honda CB750 Parts Honda CB750C Custom Parts (1980–1982) Honda CB750F Super Sport Parts (1975–1982) Honda CB750K Parts (1969–1982) Honda CB750SC & Nighthawk 750 Parts Honda CB900 Parts Honda CB900C Parts Honda CB900F Parts Honda CM Motorcycle Parts Honda CM400 Parts Honda CM400A Parts Honda CM400C Parts Honda CM400E Parts Honda CM400T Parts Honda CM450 Parts Honda CM450A Parts Honda CM450C Parts Honda CM450E Parts Honda CX Motorcycle Parts Honda CX500 Parts Honda CX500C Custom Parts Honda CX500D Deluxe Parts Honda GL1100 Gold Wing Parts Honda GL1100A Parts Honda GL1100I Parts Honda GL500 Silver Wing Parts Honda GL500I Parts Honda Gold Wing Motorcycle Parts Honda XL Motorcycle Parts Honda XL250 Parts Honda XL250S Parts Honda XL500 Parts Honda XL500S Parts Honda XR Motorcycle Parts Honda XR250 Parts Honda XR250R Parts Honda XR500 Parts Honda XR500R Parts Motorcycle Carburetor Air Cut-Off Valves Motorcycle Carburetor Parts & Rebuild Kits Vintage Honda Motorcycle Parts
Honda CB750 CB450 CB400 CB650 Air Cut Off Valve With Cover - Replaces Honda OEM 16048-429-771. This air cut-off valve supports the carburetor’s deceleration...
In stock
Honda CB450 CB400 CX500 CM400 Carburetor Screw Kit 8X-5X12

Honda CB450 CB400 CX500 CM400 Carburetor Screw Kit

$14.80
48-0794
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 Honda CM Motorcycle Parts Honda CM400 Parts Honda CM400A Parts Honda CM400C Parts Honda CM400E Parts Honda CM400T Parts Honda CM450 Parts Honda CM450A Parts Honda CM450C Parts Honda CM450E Parts Honda CX Motorcycle Parts Honda CX500 Parts Honda CX500C Custom Parts Honda CX500D Deluxe Parts Honda CX500TC Turbo Parts Motorcycle Carburetor Parts & Rebuild Kits Motorcycle Carburetor Screws & Small Hardware Motorcycle Carburetor Seals, Hoses & Small Parts Motorcycle Clutch Cover Screws & Release Hardware Motorcycle Clutch Parts, Cables & Rebuild Kits Motorcycle Engine Bolts, Screws & Hardware Vintage Honda Motorcycle Parts Vintage Motorcycle Engine Parts
Honda CB450 CB400 CX500 CM400 Carburetor Screw Kit. This carburetor screw kit replaces the small screws used on carb tops, bowls, brackets, or related...
In stock
Honda CB750 CB400 GL1100 CX500 Carb Float 16013-679-005

Honda CB750 CB400 GL1100 CX500 Carb Float - Replaces Honda OEM 16013-679-005

$32.78
20-6506
1979 Honda CB750L Limited Edition Parts Honda CB Motorcycle Parts Honda CB400 Parts Honda CB400A Parts Honda CB400T Parts Honda CB750 Parts Honda CB750F Super Sport Parts (1975–1982) Honda CB750K Parts (1969–1982) Honda CBX Motorcycle Parts Honda CBX1050 Parts Honda CM Motorcycle Parts Honda CM400 Parts Honda CM400A Parts Honda CM400T Parts Honda CX Motorcycle Parts Honda CX500 Parts Honda CX500C Custom Parts Honda CX500D Deluxe Parts Honda GL1100 Gold Wing Parts Honda GL1100A Parts Honda GL1100I Parts Honda Gold Wing Motorcycle Parts Motorcycle Carburetor Floats & Float Pins Motorcycle Carburetor Parts & Rebuild Kits Vintage Honda Motorcycle Parts
Honda CB750 CB400 GL1100 CX500 Carb Float - Replaces Honda OEM 16013-679-005. This carburetor float controls fuel level in the float bowl by raising...
In stock
Honda CB400 CX500 CM400 XL250 Air Cut Off Valve 16048-413-004

Honda CB400 CX500 CM400 XL250 Air Cut Off Valve - Replaces Honda OEM 16048-413-004

$25.16
20-4022
Honda CB Motorcycle Parts Honda CB400 Parts Honda CB400A Parts Honda CB400T Parts Honda CM Motorcycle Parts Honda CM400 Parts Honda CM400A Parts Honda CM400T 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 Motorcycle Carburetor Air Cut-Off Valves Motorcycle Carburetor Parts & Rebuild Kits Vintage Honda Motorcycle Parts
Honda CB400 CX500 CM400 XL250 Air Cut Off Valve - Replaces Honda OEM 16048-413-004. This air cut-off valve supports the carburetor’s deceleration and idle...

About the Honda CM400

Choose the Hondamatic, Custom, E or T before building your parts list.

Honda Motorcycle Logo

The CM400 family shares an air-cooled 395 cc parallel-twin engine design, with important changes around the transmission and running gear. The CM400A uses a Hondamatic torque converter and two rider-forward ranges. The C, E and T use manual clutches, and front brake and fork equipment also varies.

Shared engine family, model-specific repairs

Rear brake shoes can have a shared A/C/E/T fitment while front brake components differ. The carb kit below covers A, E and T for 1980–1981, so it should not be chosen for a C or a 1979 bike without separate confirmation. Use the model pages for a focused repair list.

Model and year comparisonCM400 parts differences

CM400A Hondamatic

Torque-converter transmission with two forward ranges. Engine and brake parts need their own A-specific application; manual-clutch kits are a different repair.

Browse CM400A Hondamatic parts

CM400C Custom

The 1981 Custom has its own fork and front-brake details. Its manual clutch and rear drum still require exact product applications.

Browse CM400C Custom parts

CM400E

The economy model combines a manual clutch with a front drum brake. Front disc pads and hydraulic master-cylinder kits are not replacements for that original drum system.

Browse CM400E parts

CM400T

A manual-clutch model with a front disc and rear drum. Confirm the year of hydraulic parts; a 1981 master-cylinder part does not cover every T.

Browse CM400T parts

Prepare for the repairIdentify your CM400 components

  • Record the complete CM400 suffix, frame number, engine number and model year.
  • Confirm the transmission type and the brake equipment actually fitted.
  • Read the carburetor body identification before choosing a kit.
  • Compare replacement forks, wheels or engines with the original model specification.

factory starting-frame references only; these are not complete VINs or full production ranges. Match the model designation and entire frame stamping. No ending serial numbers are inferred. Shared numeric beginnings do not identify the transmission. The CM400C asterisk is reproduced from the factory reference.

CM400 starting frame references
Model yearModelBeginning frame reference
1979CM400A2000001
1979CM400T2000001
1980CM400A2100001
1980CM400T2100001
1980CM400E4000009
1981CM400CNC012*BM000001
Need help identifying a part?

Contact PartsNMore with clear frame/VIN, engine and component photos. Include the original market and any known engine or front-end changes.

Honda CM400 parts questions

Which carburetor parts should I order for my CM400?
The carb kit covers CM400A, E and T 1980–1981. Coverage for 1979 and CM400C is unconfirmed. Compare the carburetor markings and kit contents before planning the rebuild.
What should I check before ordering the engine gasket set for my CM400?
This gasket set includes A, E and T fitments. Match the full suffix and year to the engine, then check the gaskets required. CM400C coverage is not established.
Does this repair use the same rear brake shoes for every CM400 year?
Rear shoes cover A/T 1979–1981, E 1980–1981 and C 1981. Match the rear hub and old shoe profile. Choose front brake components from their own model-specific fitments.
How do I confirm a part fits my CM400?
The friction plate covers C 1981, E 1980–1981 and T 1979–1981. Sold individually; order the quantity required. It is not a confirmed CM400A Hondamatic transmission part.

Your cart

×