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1981 Honda CB900C Custom Cam-Chain Service Parts

Identify the cam-chain position before ordering timing parts for your 1981 CB900C Custom. The A and B chains have different lengths, and the smaller B tensioner is a separate replacement. Inspect the supporting guide and tensioner components while defining the service scope.

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Honda CB1100 CB1000 CB900 CB750 camshaft holder seal 91311-425-000

Honda CB1100 / CB1000 / CB900 / CB750 Camshaft Holder Seal ~ Replaces 91311-425-000

$5.50 USD
18-7066
Replace your DOHC CB's camshaft holder seal with this Camshaft Holder Rubber Seal (triangular piece with rounded corners), replacing OEM #91311-425-000. One piece required...
Honda CB750 CB900 CB1100F DOHC cam chain tensioner b 14530-MG5-670

Honda CB750 / CB900 / CB1100F DOHC Cam Chain Tensioner B ~ Replaces 14530-MG5-670

$49.95 USD
07-0192
Replace your DOHC CB's smaller cam chain tensioner with this Cam Chain Tensioner "B", replacing OEM #14530-MG5-670 / #14530-425-000 / #14530-425-010 / #14530-MG1-670. A...
Honda CB1000 CB900 CB750 cam chain tensioner spring "b" 14538-425-000

Honda CB1000 / CB900 / CB750 Cam Chain Tensioner Spring "B" ~ Replaces 14538-425-000

$9.95 USD
73-0855
Replace your cam chain tensioner spring with this Cam Chain Tensioner Spring "B", the spring for the smaller cam chain tensioner ("B"). Replaces OEM...
Honda CB900 CB750 cam chain tensioner spring "a" 14514-425-010

1979-83 Honda CB900 / CB750 Cam Chain Tensioner Spring "A" ~ Replaces 14514-425-010

$5.80 USD
29-7007
Replace your DOHC main cam chain tensioner spring with this Cam Chain Tensioner Spring "A", for the larger main cam chain tensioner ("A"). Replaces...
Honda CB750 CB900 CB1100 silent cam chain b 412H x 82 14402-438-024

Honda CB750 / CB900 / CB1100 Silent Cam Chain B 412H x 82

$74.95 USD
01-0201
Service your DOHC Honda's valvetrain with this Cam Chain B, 412H x 82 links. A direct replacement for original OEM chains #14402-438-024, #14402-438-025, or...
Honda CB900 CB1000C DOHC cam chain guide 14620-438-010

Honda CB900 / CB1000C DOHC Cam Chain Guide ~ Replaces 14620-438-010

$34.95 USD
07-0191
Replace a worn cam chain guide on your big-bore DOHC Honda with this Cam Chain Guide, replacing OEM #14620-438-010. Fits the CB900C Custom, CB900F...
Honda CB 82RH2015 silent cam chain rivet link for silent cam chain service

82RH2015 Silent Cam Chain Rivet Link

$4.61 USD
01-8816
Finish your silent cam chain install the easy way with this Silent Cam Chain Rivet Link, type 82RH2015. This rivet link lets you press...
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Honda CB900 CB750 Honda cam chain tensioner 14500-425-020

1979-83 Honda CB900 / CB750 Genuine Honda Cam Chain Tensioner ~ OEM 14500-425-020 / 14500-425-010

$239.00 USD
99-5307
Upgrade or restore your classic Honda motorcycle with this Genuine Honda Cam Chain Tensioner — precision‑engineered and made in Japan. This authentic replacement part...
Honda CB900 CB1000C CB1100F silent cam chain a 412H x 126 14401-MN4-003

Honda CB900 / CB1000C / CB1100F Silent Cam Chain A 412H x 126 ~ Replaces 14401-MN4-003

$94.95 USD
01-0208
Replace a stretched or worn cam chain with this DID Cam Chain A, 412H x 126 links. Fits Honda big-bore fours running original OEM...
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1981 Honda CB900C Custom · Cam-Chain Service Parts Buying guide

Use the 1981 tension procedure when checking chain noise

The CB900C uses two cam chains. The catalog’s 126-link A chain and 82-link B chain serve different positions; the smaller B tensioner, main tensioner, springs and guide are separate components. Start with a complete inspection of the noisy or worn circuit.

Parts to consider

Honda CB900 / CB1000C / CB1100F Silent Cam Chain A 412H x 126 ~ Replaces 14401-MN4-003 126-link A cam chainDID 412H × 126-link A chain; references 14401-MN4-003 and 14401-MA3-003.View part Honda CB750 / CB900 / CB1100 Silent Cam Chain B 412H x 82 82-link B cam chain412H × 82-link cam chain B, distinct from the longer A chain.View part Honda CB750 / CB900 / CB1100F DOHC Cam Chain Tensioner B ~ Replaces 14530-MG5-670 Smaller B tensionerCam-chain tensioner B; match the smaller tensioner position before ordering.View part

Related parts: CB900 cam-chain guide

Inspect more than the chain when chasing a rattle

Honda’s head and cylinder procedures check guide wear, tensioner slipper damage and spring condition. A new chain cannot restore a worn guide or a sticking tensioner. Keep the larger main tensioner and smaller B assembly identified when ordering; their springs and mounting positions are different.

Check adjustment before condemning the tensioner

Honda’s 1981 Custom supplement gives a cold-engine tension procedure involving both front and rear adjusters. Use that exact sequence and inspect worn slippers, guides and springs before deciding which parts need replacement. For any joined chain, use only a link approved for its exact construction; the separate 82RH2015 link is not a verified match for these 412H chains.

Buying questions

Will replacing the smaller B tensioner cure every cam-chain noise?

No. Inspect both chain circuits, the guides, slippers, springs and adjustment mechanisms. Honda also lists other valve-train faults as noise sources. Identify the worn position before buying a tensioner by name alone.

Can a separate silent-chain rivet link be used with either chain?

Only when the chain manufacturer approves it for that exact chain. The featured chains are 412H; an 82RH2015 or other differently specified link is not established as compatible. Match the full chain and link specification, not just the words silent chain.

What must be checked before starting after timing work?

Use Honda’s camshaft installation sequence to verify crankshaft and camshaft marks, tensioner operation and the required final clearance checks. An apparently tight chain does not prove the cam timing is correct.

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