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1981 Honda CB400TB Hawk Starter & Charging Parts

Charging faults and starter leaks lead to different purchases on the 1981 Hawk. Compare the regulator connection with the installed loom, then distinguish the large starter body seal from the smaller mounting O-ring before planning a starter service order.

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Currently viewing Starter & Charging System

Honda motorcycle parts

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Honda CB1100 CB1000 CB900 CB750 CB450 alternator rotor puller

Honda CB Alternator Rotor Puller

$12.95 USD
35-0035
Pull your DOHC CB alternator rotor with this Alternator Rotor Puller, 18mm x M1.5 right-hand thread, for internal-thread rotors and flywheels.Key Features• Alternator rotor...
Honda CB1100 CB1000 CB900 CB750 starter clutch diode 31700-124-003

Honda CB Starter Clutch Diode ~ Replaces 31700-124-003

$12.88 USD
24-2044
Replace your starter clutch diode with this Stator Clutch Diode/Rectifier, replacing OEM #31700-124-003 / #31700-166-008. Exceptionally broad fitment across the SOHC and DOHC CB750...
New
Honda CB starter motor seal 60 x 1.4 31206-286-158

Honda CB Starter Motor Seal 60 x 1.4 ~ Replaces 31206-286-158

$5.95 USD
03-0784
Seal up your starter motor with this Starter Motor Seal, size 60 x 1.4, replacing OEM #31206-286-158 / #31206-402-008. Exceptionally broad fitment across the...
New
Honda CB starter motor seal 24.4 x 3.1 91312-MG7-003

Honda CB Starter Motor Seal 24.4 x 3.1 ~ Replaces 91312-MG7-003

$4.50 USD
03-0780
Seal up your starter motor with this Starter Motor Seal, size 24.4 x 3.1, replacing OEM #91312-MG7-003 / #91309-300-000 / #91309-425-003. Exceptionally wide fitment...
Honda CB450 CB400 rectifier regulator 31600-KV8-681

1978-86 Honda CB450 / CB400 Rectifier / Regulator ~ Replaces 31600-KV8-681

$179.95 USD
24-2088
Replace your CB400 or CB450 rectifier/regulator with this Rectifier/Regulator, 6 wires, 3 yellow in one connector block and 3 wires in a 4-space block....
New
Honda CB450 CB400 rectifier regulator lithium ion battery compatible 31600-KV8-681

1978-86 Honda CB450 / CB400 Rectifier / Regulator ~ Lithium Ion Battery Compatible

$189.95 USD
24-2034
Upgrade your CB400 or CB450 to a lithium-ion compatible regulator with this Rick's Electric Rectifier/Regulator, replacing OEM #31600-KV8-681 / #31600-413-008. Designed with a lower...
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1981 Honda CB400TB Hawk · Starter & Charging Buying guide

Separate the charging unit from starter seals

A regulator choice depends on wiring and battery requirements. Starter seals depend on the position being serviced. The related diode and rotor puller serve different electrical-service needs and are not substitutes for either.

Parts to consider

1978-86 Honda CB450 / CB400 Rectifier / Regulator ~ Replaces 31600-KV8-681 Six-wire rectifier/regulatorTwo connector blocks: three yellow wires in one block and three wires in a four-space block.View part Honda CB Starter Motor Seal 60 x 1.4 ~ Replaces 31206-286-158 Starter body seal60 × 1.4 mm starter-motor seal, replacing references 31206-286-158 and 31206-402-008.View part Honda CB Starter Motor Seal 24.4 x 3.1 ~ Replaces 91312-MG7-003 Starter mounting O-ring24.4 × 3.1 mm starter-motor O-ring, replacing reference 91312-MG7-003.View part

Related parts: Lithium-only regulator · Starting-circuit diode · Rotor-removal tool

Order seals for the correct locations

The starter choices are a 60 × 1.4 mm body seal and a 24.4 × 3.1 mm mounting O-ring. Honda identifies separate sealing parts in the original starter assembly. Compare the location being opened and the removed seal rather than choosing solely by the product name.

Keep the battery requirement explicit

The featured regulator has six wires across two blocks. The linked lithium version is restricted to compatible lithium-ion batteries, uses a 14 V ±0.2 set point and omits the black signal wire. Confirm that set point with the battery maker; do not use it with standard lead-acid batteries.

Buying questions

Are the two starter seals interchangeable?

No. Their dimensions and service positions differ. Select the 60 × 1.4 mm body seal or 24.4 × 3.1 mm mounting O-ring according to the starter joint being repaired.

Is the related diode a mechanical starter clutch?

No. It is an electrical diode associated with the starting circuit. A mechanical starter-drive problem needs separate diagnosis; this linked item does not replace the rotating clutch mechanism.

What extraction thread should I check before buying the puller?

Check for an M18 × 1.5 right-hand extraction thread in the fitted rotor. A rotor or engine replacement can change the required tool, so verify that interface before ordering.

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