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1981 Honda CB650C Custom Chain Adjustment Hardware

Inspect both sides of the rear axle when planning a chain-adjuster repair on your 1981 CB650C. The listed 40543-425-000 set contains two adjusters, two adjusting bolts and two nuts. Compare the retained fittings separately, and keep the engine primary chain apart from external rear-chain adjustment.

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Honda CB750 CB650 drive chain adjuster set 40543-425-000

1979-83 Honda CB750 / CB650 Drive Chain Adjuster Set ~ Replaces 40543-425-000

$42.95 USD
73-0101
Replace your DOHC CB chain adjusters with this Complete Drive Chain Adjuster Set. Includes 2 chain adjusters, 2 chain adjusting bolts, and 2 adjuster...
Honda CB650 CB550 CB500 CB400 CB350 primary chain 23131-426-003

Honda CB Primary Chain ~ Replaces 23131-426-003

$179.95 USD
73-0162
Replace your CB primary chain with this OEM-Quality Primary Chain, 50 link, replacing OEM #23131-426-003 / #23131-323-003.Key Features• Primary chain, OEM quality• 50 link•...
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1981 Honda CB650C Custom · Chain Adjustment Hardware Buying guide

Count the rear adjustment pieces before replacing them

Two adjusters with bolts and nuts make up the complete six-piece package. Match the actual hardware on the motorcycle to those named contents. Other axle fittings require their own inspection rather than an assumption that this set supplies every nearby component.

Parts to consider

1979-83 Honda CB750 / CB650 Drive Chain Adjuster Set ~ Replaces 40543-425-000 Drive-chain adjuster setTwo adjusters, two adjusting bolts and two nuts for the rear drive-chain adjustment hardware.View part

Count the parts supplied in each order

The set contains two adjusters, two adjusting bolts and two nuts under reference 40543-425-000. Inspect the installed arrangement before ordering, particularly where threads or mounting surfaces are damaged. Identify any other worn axle fittings separately because they are not named among the supplied components.

Avoid the wrong chain purchase

The 50-link primary chain is not an external final-drive chain. Its presence in this category does not establish the length or type needed at the rear wheel. Use the final-drive specifications and the fitted sprockets when planning a separate chain replacement.

Chain Adjustment Hardware questions

Can I rely only on swingarm marks to align the rear wheel?

No. Use both adjusters evenly, verify rear-wheel alignment with an accurate method and set chain slack to the Honda specification. Worn or mismatched index marks are not enough to establish alignment.

What should I inspect and recheck during chain adjustment?

Check the drive chain, both sprockets, axle, wheel bearings and adjuster seating. Tighten the axle and adjuster hardware using the service-manual procedure, then recheck chain slack after the axle is secured.

Can the listed 50-link chain replace the rear chain?

No. That product is identified as the engine’s primary chain. Select rear-wheel drive parts by the actual external drive specification instead of this internal-chain count.

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Send your model and year, plus photos of your existing part and any changes to the original setup.

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