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1975 Honda CB550K Starter Motor & Charging System

Starting and charging parts for the 1975 Honda CB550K include two Rick’s Electric rectifier-regulators, a two-piece starter brush set, starter motor seals in two sizes, the starter solenoid relay, a terminal rubber boot and the alternator cover gasket.

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Currently viewing Starter & Charging System

Honda motorcycle parts

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Honda CB750 CB550 CB500 CB350 starter solenoid relay 35850-371-670

Honda CB Starter Solenoid Relay ~ Replaces 35850-371-670

$21.46 USD
09-6582
Replace a failing starter solenoid with this Starter Solenoid Relay, replacing OEM #35850-371-670 / #35850-306-670 / #35850-HA7-670. Fits the SOHC CB750 lineup plus CB500/CB550K,...
Honda CB1100 CB1000 starter motor terminal rubber boot 32411-230-000

Honda CB Starter Motor Terminal Rubber Boot ~ Replaces 32411-230-000

$4.61 USD
73-0092
Replace your starter motor terminal cover with this Starter Motor Terminal (Cover) Rubber Boot, replacing OEM #32411-230-000.Key Features• Starter motor terminal rubber boot• Replaces...
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Honda CB750 CB550 CB500 CB400 CB350 rectifier regulator

Honda CB Rectifier/Regulator

$199.95 USD
24-2109
Replace your SOHC CB regulator and rectifier with this Rick's Electric OEM-Style Rectifier/Regulator. Combination unit replaces the OEM regulator and rectifier; stock-type plugs and...
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Honda CB750 CB550 rectifier regulator lithium ion battery compatible

Honda CB Rectifier/Regulator ~ Lithium Ion Battery Compatible

$199.95 USD
24-2011
Upgrade to a lithium-ion compatible charging regulator with this Rick's Electric Rectifier/Regulator. Designed with a lower voltage set point to work exclusively with lithium-ion...
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 CB1100 CB1000 CB900 CB750 starter motor brush set 31201-292-158

Honda CB Starter Motor Brush Set ~ Replaces 31201-292-158

$29.95 USD
24-2021
Replace your Mitsuba 2-brush starter motor brushes with this Replacement Starter Brush Set of 2, 12mm x 14mm x 6mm, 1 piece with insulated...
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Honda CB550F CB550K CB500K alternator cover gasket 11691-323-306

1971-78 Honda CB550F / CB550K / CB500K Alternator Cover Gasket ~ Replaces 11691-323-306

$9.86 USD
18-6999
Replace your CB500K or CB550 alternator cover gasket with this Alternator Cover Gasket, replacing OEM #11691-323-306.Key Features• Alternator cover gasket• Replaces OEM #11691-323-306• Honda...
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1975 Honda CB550K · Starter & Charging Buying guide

Starting and charging

Starter brushes, seals, the solenoid and charging regulators are separate choices. Compare the fitted starter components and battery type before ordering; a lithium-only regulator has different battery requirements from the conventional Rick’s unit.

Parts to consider

Honda CB Starter Motor Brush Set ~ Replaces 31201-292-158 Starter motor brush setSet of two Mitsuba brushes, 12 × 14 × 6 mm; one insulated lead and one non-insulated lead.View part Honda CB Starter Solenoid Relay ~ Replaces 35850-371-670 Starter solenoid relayRelay referencing Honda 35850-371-670; the listing includes the CB550K1 and states it is not polarity sensitive.View part Honda CB Rectifier/Regulator Rick’s Electric rectifier-regulatorOne-piece unit replacing both original boxes, supplied with factory-style plugs; 1974-78 CB550K.View part

Related parts: Lithium-ion compatible regulator · Large starter motor seal · Alternator cover gasket

Regulator mounting

The conventional Rick’s unit combines the regulator and rectifier, includes stock-type plugs and may require adapted mounting. Compare the stated body dimensions and 80 mm mounting-hole spacing with the available location. The lithium-only version has its own dimensions and battery requirements.

Starter seals in two sizes

The large starter seal references Honda 31206-286-158; a separate small seal references 91312-MG7-003. Both listings include the 1974–78 CB550K. Identify the seal being replaced and compare its reference and stated dimensions rather than assuming the two listings cover the same position.

Common questions

What size are the starter brushes?

Each brush is 12mm x 14mm x 6mm. The set of two stands in for Honda 31201-292-158 and suits Mitsuba two-brush starters on 1974-78 CB550K bikes.

Can I use the lithium regulator with a lead-acid battery?

No. Its reduced charging voltage is intended for lithium-ion batteries only, according to the listing. A conventional lead-acid battery should be paired with the standard Rick’s unit instead.

Is the terminal boot listed for this bike?

Yes. The starter motor terminal boot stands in for Honda 32411-230-000 and lists CB550K bikes from 1974 to 1978. It covers the cable connection on the starter.

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