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1973 Honda CB450K Engine Components by Reference & Supplied Scope

Prepare engine purchases for your 1973 CB450K by recording the replacement reference and supplied scope for each requirement. Gasket coverage, valve quantities and drive specifications need different checks. Use the fitted components to resolve the order, particularly when the engine or surrounding hardware has changed.

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Honda motorcycle parts

Choose your model and year to see parts listed for your bike.

Honda CB750 CB650 CB550 front sprocket lock plate set 23811-292-000

Honda CB Front Sprocket Lock Plate Set ~ Replaces 23811-292-000

$5.95 USD
49-0782
Replace your front sprocket lock plate with this Front Sprocket Lock Plate with 2 lock plate bolts. Always good to replace these when installing...
New
Honda CB750 CB550 CB500 rear shock swingarm bushing 40548-268-000

Honda CB Rear Shock Swingarm Bushing ~ Replaces 40548-268-000

$6.20 USD
28-6918
Rear shock swingarm bushing designed to replace the original Honda component, matching OEM reference 40548-268-000. Fits between the shock and swingarm to provide proper...
New
Honda CB500 CB450 CL450K1 CL450K2 CL450K3 overhaul gasket set

Honda CB Overhaul Gasket Set

$64.95 USD
18-0098
Rebuild your CB500T or CB450/CL450 engine with this Engine Overhaul Gasket Set.Note: fits 5-speed CB450K models only.Key Features• Engine overhaul gasket set• For 5-speed...
New
Honda CB500 CB450 CL450K0 CL450K2 CL450K3 intake valve 14711-292-000

Honda CB Intake Valve ~ Replaces 14711-292-000

$26.95 USD
28-6920
Restore proper engine performance with this Intake Valve, designed as a direct replacement for the original Honda component. This valve replaces OEM part number...
New
Honda CB450 CL450 CB500T engine oil seal kit with 7 seals 91202-283-013

1968-76 Honda CB450 / CL450 / CB500T Engine Oil Seal Kit

$21.95 USD
01-9926
Refresh critical engine sealing points with this Engine Oil Seal Kit (7 Pieces), designed to replace common oil seals used in the engine assemblies...
New
Honda CB500 CB450 CL450K0 CL450K2 CL450K3 exhaust valve 14721-292-010

Honda CB Exhaust Valve ~ Replaces 14721-292-010

$26.95 USD
28-6919
Restore proper engine performance with this Exhaust Valve, designed as a direct replacement for the original Honda component. This valve replaces OEM part numbers...
New
Honda CB550 CB500 CB450 CL450K0 drive chain adjuster w nut and bolt

Honda CB Drive Chain Adjuster with Nut & Bolt

$24.95 USD
99-4854
Upgrade or restore your classic Honda motorcycle’s drive system with this Drive Chain Adjuster with Nut and Bolt — designed to keep your rear...
Honda CB750 CB550 drive chain adjuster screws black joker machine 90119-283-000

Honda CB Drive Chain Adjuster Screws ~ Black ~ Joker Machine ~ Replaces 90119-283-000

$59.95 USD
73-1059
Refresh your drive chain adjusters with these Joker Machine Brand Black Custom Type Drive Chain Adjuster Screws, set of 2, with gold-cadmium-plated nuts. Replaces...
New
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Honda CB500 CB450 joker machine magnetic oil drain plug 90013-312-000

Honda CB Joker Machine Magnetic Oil Drain Plug ~ Replaces 90013-312-000

$64.95 USD
12-0108
Catch engine debris between oil changes with this Joker Machine Magnetic Oil Drain Plug with O-ring, replacing OEM #90013-312-000. High-quality 6061 billet aluminum body...
New
Honda CB500 CB450 CL450K0 front sprocket 15 tooth 23801-348-690

Honda CB Front Sprocket ~ 15 Tooth ~ Replaces 23801-348-690

$23.95 USD
99-4807
15 tooth front sprocket designed as a direct replacement for the original Honda component, matching OEM reference 23801-348-690. Plays a key role in final...
Honda CB500 CB450 CB400 CB360 CB350 cylinder head gasket 12909-428-003

Honda CB Cylinder Head Gasket ~ Replaces 12909-428-003

$2.95 USD
73-1186
Restore top-end sealing performance with this high-quality Cylinder Head Gasket. Designed to match OEM specifications, this gasket ensures a perfect fit and proper sealing...
Honda CB500 CB450 CB360 special oil filter rotor washer 90481-292-000

Honda CB Special Oil Filter Rotor Washer ~ Replaces 90481-292-000

$9.46 USD
29-7034
Replace your oil filter rotor washer with this Special Angled Oil Filter Rotor Washer (16mm), replacing OEM #90481-292-000.Key Features• Special angled oil filter rotor...
Honda CB500 CB450 CL450 cam chain 219T x 128 14401-283-003

Honda CB500 / CB450 / CL450 Cam Chain ~ 219T x 128 ~ Replaces 14401-283-003

$99.95 USD
52-3034
Replace your CB500T or CB450 cam chain with this Cam Chain 219T x 128, replacing OEM #14401-283-003. D.I.D (Daido) brand. Pitch .3061, peanut side...
Honda CB500 CB450 CL450 cam chain 219FTSS x 128 14401-283-003

Honda CB500 / CB450 / CL450 Cam Chain ~ 219FTSS x 128 ~ Replaces 14401-283-003

$99.95 USD
52-4012
Replace your CB500T or CB450 cam chain with this Cam Chain 219FTSS x 128, replacing OEM #14401-283-003. D.I.D (Daido) brand. Pitch .3061, stepped parallel...
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Honda CB450 CL450K2 CL450K3 CL450K4 CL450K5 Athena overhaul gasket set

Honda CB Athena Overhaul Gasket Set

$99.95 USD
18-0297
Rebuild your CB450K or CL450K engine with this Athena Overhaul Engine Gasket Set. Athena of Italy is an original-equipment supplier to Yamaha, Honda, Kawasaki,...
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1973 Honda CB450K · Engine Buying guide

Keep each component requirement beside its purchase contents

The restricted overhaul gasket set calls for a five-speed engine. Cam-chain products give full D.I.D designations, while the final-drive sprocket identifies 15 teeth. Oil seals, valves and rotor hardware have separate references and purchasing units.

Parts to consider

Honda CB Overhaul Gasket Set Five-speed-restricted overhaul gasketsOverhaul gasket set expressly restricted to five-speed CB450K engines. Compare gasket shapes needed and obtain the actual supplied inventory before deciding repair coverage.View part Honda CB500 / CB450 / CL450 Cam Chain ~ 219T x 128 ~ Replaces 14401-283-003 D.I.D 219T × 128 cam chainEngine cam chain listing peanut side plates, 14401-283-003 and an included clip link. Check the required full designation separately from final-drive chain needs.View part Honda CB Front Sprocket ~ 15 Tooth ~ Replaces 23801-348-690 Individual 15-tooth front sprocketFront sprocket referencing 23801-348-690, sold individually. Count the fitted teeth and check chain length as the description requests.View part

Related parts: Angled rotor washer, reference 90481-292-000 · Intake valve supplied individually · Magnetic drain plug including its O-ring

Plan gasket coverage independently of the package name

An overhaul label identifies the product type without itemizing every supplied gasket. Compare the joints involved and required shapes before choosing either set. Keep the five-speed restriction with the applicable product, and check separate oil seals or the small cylinder-stud seal explicitly when those components are needed.

Keep reference checks useful after earlier modifications

A motorcycle heading cannot identify every component fitted by previous owners. Record the actual engine, valve position and drive arrangement before matching references and dimensions. Check supplied contents separately from fit: an appropriate part can still be an individual purchase rather than all hardware or seals required for the job.

Buying questions

Which overhaul gasket set requires a five-speed engine?

The overhaul gasket set 18-0098 expressly requires a five-speed CB450K engine. Compare the fitted engine before ordering. Its description does not itemize every supplied gasket, so confirm the shapes and pieces needed for your repair separately.

How can I check whether an order covers the sealing work?

Compare the required gasket shapes and seal references with confirmed contents for each purchase. The overhaul descriptions are not complete inventories. The seven oil seals and small stud seal need separate inclusion checks, along with the restricted set’s five-speed condition.

Which quantity checks matter when adding valves and drive hardware?

Both valve products state individual supply, while the sprocket plate includes two bolts and the Joker screw product supplies a pair. Keep those different purchasing units with their own components. Count the parts required by the assessed repair before setting order quantities.

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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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