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  • 1971-78 Honda CB550K / CB500K Chain Cover Guard ~ Replaces 40510-323-000B
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Honda CB550K CB500K chain cover guard 40510-323-000B
SKU 73-0001 — approved OEM fiche location reference (BI05-close-r2)
Honda CB550K CB500K chain cover guard 40510-323-000B
Secure checkoutProtected payment
60-day returnsEligible unused parts Free ground shippingUSA & Canada over $50
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Honda CB550K CB500K chain cover guard 40510-323-000B

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Load image into Gallery viewer, Honda CB550K CB500K chain cover guard 40510-323-000B
Load image into Gallery viewer, SKU 73-0001 — approved OEM fiche location reference (BI05-close-r2)
Load image into Gallery viewer, Honda CB550K CB500K chain cover guard 40510-323-000B

1971-78 Honda CB550K / CB500K Chain Cover Guard ~ Replaces 40510-323-000B

73-0001
$219.95 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
1971-78 Honda CB550K / CB500K Chain Cover Guard ~ Replaces 40510-323-000B
$219.95 USD
Description

Restore the original look and protection of your motorcycle’s drive chain with this Chain Cover Guard, designed as a direct replacement for the factory unit. This guard replaces OEM part number 40510-323-000B and helps protect the chain while preventing debris and lubricant from reaching surrounding components.

Manufactured from high-quality black plastic and made in Japan, this chain guard offers excellent durability and a factory-style appearance that suits both restorations and everyday riders looking to replace a damaged or missing cover.

Key Features
• Chain cover guard replacement for vintage Honda motorcycles
• Replaces OEM part number 40510-323-000B
• High-quality black plastic construction
• Made in Japan for dependable fit and finish
• Helps protect the chain and surrounding components
• Honda part name: Case, Drive Chain *NH1* (Black)

Fitment / Compatibility
• CB500K (1971-1973)
• CB550K (1974-1978)

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

Make Model Year
Honda CB500K0 1971
Honda CB500K1 1972
Honda CB500K2 1973
Honda CB550K0 1974
Honda CB550K1 1975
Honda CB550K2 1976
Honda CB550K3 1977
Honda CB550K4 1978

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.

See full shipping details

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.

Start your return below. Wait for our instructions before mailing a part back.

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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 many CB500K or CB550K chain-cover guards are included?

One Japanese-made chain cover replacing Honda 40510-323-000B is included, enough for one compatible 1971-1978 CB500K or CB550K.

What should be checked after installing the chain cover?

Verify clearance to the chain, rear sprocket, tire and shock through suspension travel. The guard does not replace correct chain alignment, slack adjustment or lubrication.

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