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1978 Honda CB550K Service Tool and Seat Lock Choices

Select a tool for the fitting already on the motorcycle, then choose any replacement hardware separately. The fork cap wrench, conditional spin-on filter wrench and seat lock have different uses and contents. Check actual working sizes, filter arrangement and retained seat fittings before combining purchases.

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Most orders ship same or next business day Fitment guarantee Listed for your exact model and year? We’ll make it right if it doesn’t fit as described. Mechanic-backed support Ask our team for help choosing the right Honda CB part.
Currently viewing Tools, Hardware & Other

Honda motorcycle parts

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

New
Logo patch 4 x 1 in. motorcycle garage patch

VintageCB750 Logo Patch ~ 4 x 1 in.

$7.87 USD
08-0318
Show off your VintageCB750 pride with this VintageCB750 Logo Sew-On Patch, featuring metallic red thread. Looks great sewn onto a riding jacket, hat, or...
Honda CB900 CB750 CB650 CB550 front wheel bearing retainer ring tool

Honda CB Front Wheel Bearing Retainer Ring Tool

$34.95 USD
73-0186
Service front wheel bearing retainer rings without damage using this Front Wheel Bearing Retainer Ring Tool. High-quality tool for removing and fitting the front...
Honda CB750 CB650 CB550 CB500 CB400 seat lock with keys 77230-399-007

Honda CB Seat Lock with Keys ~ Replaces 77230-399-007

$28.95 USD
73-0140
Restore your seat lock with this Seat Lock with Keys, replacing OEM #77230-399-007 / #77230-107-711.This seat lock works perfectly for the bikes listed; the...
Honda CB1100 CB1000 CB900 CB750 oil filter wrench

Honda CB1100/CB1000/CB900/CB750 Oil Filter Wrench

$14.95 USD
35-9022
Remove and install spin-on oil filters with this 3/8" Drive Tripod Oil Filter Wrench. Designed for our aftermarket spin-on cartridge oil filters.Key Features• 3/8"...
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750 four engine t-shirt (xl size)

750 Four Engine T-Shirt (XL Size)

$29.95 USD
3/XL
Pay homage to Honda's groundbreaking inline-four with the 750 Four Engine T-Shirt in Extra Large. A black 100% cotton tee featuring a beautifully rendered...
Honda CB750 CB650 CB550 CB500 35 36mm fork seal driver

Honda CB750 / CB650 / CB550 / CB500 35/36mm Fork Seal Driver

$49.95 USD
35-4299
Install 35mm or 36mm fork seals cleanly with this 35/36mm Fork Seal Driver. High-quality carbon steel with split design. Use for easy installation of...
Honda CB750 CB550 fork cap wrench 24mm

Honda CB750 / CB550 Fork Cap Wrench ~ 24mm

$7.00 USD
35-9116
Remove 24mm fork caps without damage with this 24mm Non-Marring Fork Cap Wrench. Fits all motorcycles with 24mm fork caps. Lets you remove fork...
New
Universal motorcycle beanie hat toque

Universal Motorcycle Beanie Hat/Toque

$15.95 USD
19-0117
Represent classic Honda style with this Honda Beanie Hat / Toque. Black knit with the classic Honda logo on both sides. One size fits...
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750 four engine t-shirt (large size)

750 Four Engine T-Shirt (Large Size)

$29.95 USD
3/L
Celebrate the iconic SOHC inline-four with the 750 Four Engine T-Shirt in Large. Printed on a quality 100% cotton black tee, the front graphic...
New
Red Honda logo hat vintage motorcycle hat

Red Honda Logo Hat

$22.95 USD
61-1132
Add a Red Honda Logo Hat to your gear collection. Velcro adjustable back.Key Features• Red Honda Logo Hat• Velcro adjustable backPart Number: 61-1132
New
Blue Honda racing hat vintage motorcycle hat

Blue Honda Racing Hat

$22.95 USD
61-1133
Add a Blue Honda Racing Hat to your gear collection. Velcro adjustable back.Key Features• Blue Honda Racing Hat• Velcro adjustable backPart Number: 61-1133
750 four engine t-shirt (medium size)

750 Four Engine T-Shirt (Medium Size)

$29.95 USD
3/M
Pay tribute to the heart of the CB750 with the 750 Four Engine T-Shirt in Medium. A black 100% cotton tee featuring a beautifully...
New
Universal motorcycle face mask

Universal Motorcycle Face Mask

$17.50 USD
13-0005
Keep road debris out of your eyes with this Face Mask with removable goggles. Features air holes in the mouth area and on the...
Established 2010 t-shirt (xl size)

Established 2010 T-Shirt (XL Size)

$26.95 USD
2/-XL
Proudly display your place in the CB750 community with the Established 2010 T-Shirt in X-Large. A black 100% cotton tee featuring the "Established 2010...
New
Honda hrc logo trucker hat

Honda HRC Logo Trucker Hat

$27.95 USD
61-1144
Top off your kit with this Honda Logo with HRC Emblem Trucker Hat. High-quality hat with beautifully stitched Honda logo. Snap-on adjustable back.Key Features•...
New
White Honda logo hat vintage motorcycle hat

White Honda Logo Hat

$22.95 USD
61-1142
Add a White Honda Logo Hat to your gear collection. Velcro adjustable back.Key Features• White Honda Logo Hat• Velcro adjustable backPart Number: 61-1142
Universal motorcycle fork cap wrench 35mm

Universal Motorcycle Fork Cap Wrench ~ 35mm

$7.00 USD
35-9113
Fork Cap Wrench ~ 35MM Size for custom or restoration work on classic Honda CB motorcycles.  Key Features Aftermarket part Sold as: Each Fitment...
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Established 2010 t-shirt (large size)

Established 2010 T-Shirt (Large Size)

$26.95 USD
2/-L
Celebrate the CB750 community in this Established 2010 T-Shirt (Large). A black 100% cotton tee featuring the "Established 2010 VintageCB750 Logo" on the front,...
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750 four engine t-shirt (xxl size)

750 Four Engine T-Shirt (XXL Size)

$29.95 USD
3/2XL
Wear your respect for Honda's legendary four-cylinder on your chest with the 750 Four Engine T-Shirt in XX-Large. A 100% cotton black tee featuring...
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Established 2010 t-shirt (xxl size)

Established 2010 T-Shirt (XXL Size)

$26.95 USD
2/-2XL
Represent the CB750 scene in this Established 2010 T-Shirt (XX-Large). A roomy, soft 100% cotton tee in black with the "Established 2010 VintageCB750 Logo"...
New
Universal motorcycle bottle opener vintage garage accessory

Universal Motorcycle Bottle Opener ~ Vintage Garage Accessory

$14.95 USD
19-0118
Find a great gift for any motorcycle fan with this Motorcycle Bottle Opener. Sturdy construction with an aged brass look. 5" x 1.5".Key Features•...
New
Honda 93 red hat vintage motorcycle hat

Honda 93 Red Hat

$29.95 USD
61-1145
Top off your kit with this Honda 93 Red Hat. High-quality hat with beautifully stitched logos.Key Features• Honda 93 Red Hat• Beautifully stitched logosPart...
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T-shirt (small size)

Classic T-Shirt (Small Size)

$20.59 USD
00-0001/S
Wear your passion for classic Hondas with the VintageCB750 Classic T-Shirt in Small. This 100% cotton tee comes in black with the VintageCB750 logo...
Established 2010 t-shirt (medium size)

Established 2010 T-Shirt (Medium Size)

$26.95 USD
2/-M
Honor the CB750 community in everyday comfort with the Established 2010 T-Shirt in Medium. A black 100% cotton tee carrying the "Established 2010 VintageCB750...
Established 2010 t-shirt (small size)

Established 2010 T-Shirt (Small Size)

$26.95 USD
2/-S
Commemorate a decade-plus of CB750 community with the Established 2010 T-Shirt in Small. This black 100% cotton tee carries the "Established 2010 VintageCB750 Logo"...
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Sale
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Honda Gold Label T-Shirt - Black

Honda Gold Label T-Shirt - Black

$29.95 $27.95 USD
You save $2.00
33/M
A black Honda tee with the Gold Label wing graphic printed on the front. Factory Effex uses a lightweight cotton and polyester blend for...
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1978 Honda CB550K · Tools, Hardware & Other Buying guide

Identify the fitted cap, filter and seat lock first

Stock cap application, aftermarket filter type and lock projection are separate buying checks. Compare each fitted component with its product description; a broad service order should not turn one tool or lock into an assumed complete repair package.

Parts to consider

Honda CB750 / CB550 Fork Cap Wrench ~ 24mm Stock-cap 24 mm fork wrenchWrench for the stated stock 24 mm cap application. Compare any changed cap before buying; fork tube diameter is not the working hex measurement.View part Honda CB1100/CB1000/CB900/CB750 Oil Filter Wrench Tripod wrench for the specified spin-on filter3/8-inch-drive wrench listed for the store’s 15-1006 aftermarket cartridge. Identify the fitted filter first; it is not a stated tool for the original paper-element housing.View part Honda CB Seat Lock with Keys ~ Replaces 77230-399-007 Seat-lock replacement with keysLock referencing 77230-399-007 and 77230-107-711. Its mechanism projects slightly farther than the original, and the description does not establish an ignition-key match.View part

Related parts: Split fork-seal driver · Front bearing-retainer ring tool

Choose the filter tool after identifying the conversion

The wrench is specified for the store’s aftermarket spin-on filter, whose listing includes CB550K 1974–78. Identify that installed cartridge before choosing the tool. A motorcycle year match does not establish a fitted conversion or make the wrench a tool for the original filter housing and bolt.

Compare the lock without assuming a hardware kit

The seat lock comes with keys, but the number of keys and a match to the ignition are not stated. Compare the farther-projecting locking mechanism with the retained assembly, and assess surrounding hinges, brackets and locking parts independently. Those contents are not established as a complete package.

Common questions

Can I buy the fork wrench from tube diameter alone?

The cap’s working hex and fork tube diameter are separate dimensions. Check the actual cap against the 24 mm wrench specification; a stock model application does not identify the hex of a changed cap.

Does the filter wrench arrive with a new cartridge?

It is a tripod tool with a stated 3/8-inch drive. A filter or conversion parts are separate purchases, so identify the installed setup before choosing the tool and any replacement cartridge.

Does the seat lock provide every seat mounting fitting?

The listing identifies a lock with keys, not an entire seat mounting assembly. Inspect the hinge, locking bar and support pieces separately and confirm any additional contents needed before assuming the lock purchase completes all seat hardware.

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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