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1978 Honda CB750A Seat Locks, Hinges & Support

The CB750A seat choices address its closure and supports: a lock with keys, separate lock bar, hinge pins and a setting rubber. Identify the piece needing attention before choosing a product. The lock’s projecting mechanism and the pin quantity are particularly useful checks against the existing seat.

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Honda CB750 CB650 CB550 CB500 seat lock bar assembly 77220-340-003

Honda CB Seat Lock Bar Assembly ~ Replaces 77220-340-003

$54.95 USD
73-1070
Replace your seat lock bar with this Seat Lock Bar Assembly, replacing OEM #77220-340-003 / #77220-340-011.Key Features• Seat lock bar assembly• Replaces OEM #77220-340-003...
Honda CB750 CB650 CB550 CB500 CB400 seat lock with keys 77230-399-007

Honda CB Seat Lock with Keys ~ Replaces 77230-399-007

$28.95 USD
73-0140
Restore your seat lock with this Seat Lock with Keys, replacing OEM #77230-399-007 / #77230-107-711.This seat lock works perfectly for the bikes listed; the...
Honda CB750 CB550 CB500 CB350 SL350K1 seat hinge pin 77103-313-000

Honda CB Seat Hinge Pin ~ Replaces 77103-313-000

$4.50 USD
73-0947
Replace your seat hinge pin with this Seat Hinge Pin, replacing OEM #77103-313-000.Note: 2 used per bike, order the quantity you require.Key Features• Seat...
Honda CB750 CB650 CB550 CB500 seat setting rubber 77204-312-000

Honda CB Genuine Honda Seat Setting Rubber ~ OEM 77204-312-000

$13.95 USD
99-5052
Upgrade or restore your classic Honda motorcycle with this Genuine Honda Seat Setting Rubber — precision‑engineered and quality made in Japan. This authentic replacement...
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1978 Honda CB750A · Seat locks, hinges & support Buying guide

Inspect the closure, hinges and rubber as separate pieces

The lock is supplied with keys and notes a mechanism extending farther than the original. The hinge pin has two listed per motorcycle, while the setting rubber is sold individually. The lock bar remains a separate purchase.

Parts to consider

Honda CB Seat Lock with Keys ~ Replaces 77230-399-007 Replacement seat lock with keysLock referencing 77230-399-007 and 77230-107-711. The mechanism is described as projecting slightly farther than the original.View part Honda CB Seat Hinge Pin ~ Replaces 77103-313-000 Seat hinge pinHinge pin replacing 77103-313-000. The listing specifies two used per bike and ordering the quantity required; order one for each pin being renewed.View part Honda CB Genuine Honda Seat Setting Rubber ~ OEM 77204-312-000 Individual seat setting rubberGenuine Honda rubber referencing 77204-312-000, sold individually for the listed seat-support application.View part

Related parts: Separate seat lock bar assembly

Inspect clearance around the retained lock mounting

Keep the existing bracket and surrounding seat parts available for comparison with the replacement lock. Assess the lock bar separately using its own references before deciding which closure parts need renewal.

Count hinge and support pieces from the inspected seat

The hinge pins are ordered individually, with two per motorcycle stated by the listing. The setting rubber is also sold individually, but its description gives no model-specific count. Inspect the actual seat supports before setting that separate quantity.

Common questions

Will the supplied seat keys match the ignition key?

The listing supplies a seat lock with keys but does not state that those keys match an existing ignition or other lock. Confirm any required matching-key arrangement before buying rather than interpreting the supplied keys as a motorcycle-wide lock set.

Are the hinge pins ordered individually?

Yes. The description specifies two used per bike and directs buyers to order the quantity required. Order one for each pin needing replacement, up to two when renewing both listed positions.

Does the seat lock also supply the lock bar?

The lock bar is listed separately under references 77220-340-003 and 77220-340-011. The lock product identifies its own replacement references and keys. Compare the retained bar and lock before adding either, instead of assuming all closure pieces arrive in one purchase.

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