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

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

24-2088
$179.95 USD
In stock Usually ships the same or next business day
Check model fitment View fitment
Questions about this part? Contact us 4.8/5 1,347 store reviews
Secure checkoutProtected payment
60-day returnsEligible unused parts Free ground shippingUSA & Canada over $50
Browse all parts
1978-86 Honda CB450 / CB400 Rectifier / Regulator ~ Replaces 31600-KV8-681
$179.95 USD
Description

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. Replaces OEM #31600-KV8-681 / #31600-413-008 / #31600-MC9-740.

Key Features
• Rectifier/regulator
• 6 wires across 2 connector blocks
• 3 yellow wires + 3 wires in 4-space block
• Replaces OEM #31600-KV8-681 / #31600-413-008 / #31600-MC9-740
• Honda part name: Rectifier Assy., Regulator
• Interchangeable with Honda 31600-KN8-730

Fitment / Compatibility
• Honda CB400A (1978)
• CB400TI (1978‑79)
• CB400TII (1978‑79)
• CB400T (1980‑81)
• CB450T (1982)
• CB450SC (1982‑83 / 1985‑86)

Part Number: 24-2088

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Check the listed model and year, then read any fitment notes in the description.

Make Model Year
Honda CB400A 1978
Honda CB400TI Hawk 1978
Honda CB400TIZ Hawk 1979
Honda CB400TII Hawk 1978
Honda CB400TIIZ Hawk 1979
Honda CB400TII Hawk 1978
Honda CB400TIIZ Hawk 1979
Honda CB400TA Hawk 1980
Honda CB400TB Hawk 1981
Honda CB450SCC Nighthawk 1982
Honda CB450SCD Nighthawk 1983
Honda CB450SCF Nighthawk 1985
Honda CB450SCG Nighthawk 1986
Honda CB450TC 1982

Free ground shipping over $50

To the USA & Canada. In-stock orders usually ship from our own warehouse the same or next business day.

Estimated ground delivery after your order ships
DestinationDelivery time
USA4–7 business days
Canada2–6 business days

Ground shipping includes tracking, emailed when your order ships. Need it sooner? Express options are available at checkout.

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60-day returns on eligible parts

No restocking fees. Eligible parts must be unused, uninstalled, unaltered and complete. The 60-day window starts when your order is delivered.

Electrical parts are excluded from standard returns. Check return eligibility.

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Other shipping options

Canada Post Economy: Available at checkout for select small items. Allow 1–3 weeks for delivery. No tracking or insurance is included.

Outside the USA & Canada: Delivery times vary by destination and shipping method. Buyers are responsible for applicable duties, taxes and import fees. We cannot mark orders as gifts.

Frequently Asked Questions

How can I identify rectifier/regulator 24-2088 by its wiring?

It has six wires in two connector blocks: three yellow wires in one block and three wires occupying a four-space block.

Which Honda rectifier/regulator numbers does 24-2088 replace?

It cross-references Honda 31600-KV8-681, 31600-413-008 and 31600-MC9-740 for the listed 1978-1986 CB400 and CB450 applications.

What should be checked before replacing the rectifier/regulator?

Compare both connector blocks and wire colors, test the battery and stator, inspect grounds and overheated terminals, then verify charging voltage after installation.

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