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1981 Honda CB650 Drive-Chain Adjusters

Check both rear adjusters and the surfaces they bear against when servicing your 1981 Honda CB650. The listed set replaces 40543-425-000 and supplies two adjusters, two adjusting bolts and two nuts. Inspect the retained axle fittings before completing the hardware order.

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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 CB650 · Drive-Chain Adjusters Buying guide

Renew the adjustment hardware as needed

The set renews the two adjuster assemblies and their listed fasteners. Compare those pieces with the fitted rear-wheel arrangement. Primary-chain service concerns the internal engine drive and requires a separate parts decision from this axle-adjustment repair.

Parts to consider

1979-83 Honda CB750 / CB650 Drive Chain Adjuster Set ~ Replaces 40543-425-000 Chain adjuster setIncludes two adjusters, two adjusting bolts and two nuts.View part

What the adjuster set supplies

One set includes two chain adjusters, two adjusting bolts and two nuts. Check the existing assemblies for damaged threads and missing hardware before ordering. Keep any additional wheel hardware on a separate list rather than assuming it comes with these adjusters.

Check the mounting arrangement as well as the parts count

The six-piece set replaces 40543-425-000. That reference and model application support the listed arrangement, while a changed swingarm or axle needs its own fitment check. Compare the adjusters and fasteners with the installed hardware before committing to the replacement set.

Ordering 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.

Will this hardware fit a modified swingarm?

A model listing cannot establish an aftermarket swingarm application. Compare the adjuster mounting details and fasteners with the altered assembly, then resolve any differing dimensions or fittings before ordering. The listed replacement reference is 40543-425-000.

Not sure which part you need?

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

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