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1975 Honda CB550K Front Brake Caliper Parts & Bleed Screws

Caliper parts for the 1975 Honda CB550K let you rebuild the original front caliper or replace it outright. The listings cover a full caliper assembly, the piston and sealing ring, the pad adjuster set, mounting bolts, the bleed screw and its caps.

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Currently viewing Brake Caliper Rebuild Kits, Caliper Pistons, Bleed Screws

Honda motorcycle parts

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

Honda CB900 CB750 CB650 caliper piston sealing ring 45108-300-003

Honda CB Caliper Piston Sealing Ring ~ Replaces 45108-300-003

$7.95 USD
29-0527
Replace your front caliper piston sealing ring with this Front Brake Caliper Piston Sealing Ring, replacing OEM #45108-300-003. Also fits the rear brake caliper...
Honda CB750 CB550 front brake caliper bleed screw rubber cap 45110-300-003

Honda CB Front Brake Caliper Bleed Screw Rubber Cap (Stock Type) ~ Replaces 45110-300-003

$3.95 USD
29-7018
Replace your front caliper bleed screw rubber cap with this Stock Type Front Brake Caliper Bleed Screw Rubber Cap, the same design as the...
Honda CB750 CB550 CB500 CB450 front caliper adjuster set 45117-341-700

Honda CB750 / CB550 / CB500 / CB450 Front Caliper Adjuster Set ~ Replaces 45117-341-700

$13.95 USD
29-7016
Restore your front caliper adjuster with this Front Brake Caliper Adjuster Set, including adjusting bolt, spring, washer, and nut. Replaces OEM #45117-341-700 (bolt), #45119-300-020...
Honda CB750 CB550 CB500 front brake caliper bleed screw 45224-579-013

Honda CB Front Brake Caliper Bleed Screw ~ Replaces 45224-579-013

$8.95 USD
73-0993
Replace your front caliper bleed screw with this Front Brake Caliper Bleed Screw, replacing OEM #45224-579-013.Key Features• Front brake caliper bleed screw• Replaces OEM...
Honda CB1100 CB1000 caliper bleed cap (pk 10) 45108-425-003

Honda CB Caliper Bleed Screw Rubber Cap (Pk/10) ~ Replaces 45108-425-003

$11.95 USD
29-0500
Stock up on caliper bleed screw rubber caps with this Brake Caliper Bleed Screw Rubber Cap 10-pack. Universal type for series 1, 3, 4,...
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Honda CB550 CB500 CB450 CB400 CB360 front caliper piston 45107-323-020

Honda CB Front Caliper Piston ~ Replaces 45107-323-020

$21.78 USD
29-0058
Replace your front brake caliper piston with this Front Brake Caliper Piston, 38.15mm diameter x 34mm height, replacing OEM #45107-323-020. The side with the...
Honda CB750 CB550 front brake caliper bolt and washer set 90165-323-000

Honda CB Front Brake Caliper Bolt & Washer Set ~ Replaces 90165-323-000

$12.50 USD
73-1027
Replace your front caliper bolts and washers with this Front Brake Caliper Bolt & Washer Set. Includes 2 bolts and 2 washers. Replaces OEM...
Honda CB550 CB500 CB450 front brake caliper assembly 45100-390-405

Honda CB Front Brake Caliper Assembly ~ Replaces Honda OEM 45100-390-405

$119.95 USD
33-0039
Replace a worn, seized, damaged, or missing front brake caliper with this aftermarket full caliper assembly for Honda CB models. It is a replacement...
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1975 Honda CB550K · Caliper Parts Buying guide

Rebuild or replace the caliper

Inspect the caliper before choosing individual parts or the replacement assembly. Piston condition, sealing area, bleed screw and mounting hardware belong in that assessment; a new piston alone cannot settle whether the original caliper can be rebuilt.

Parts to consider

Honda CB Front Caliper Piston ~ Replaces 45107-323-020 Front caliper pistonPiston of 38.15mm diameter and 34mm height, a stand-in for Honda 45107-323-020.View part Honda CB Caliper Piston Sealing Ring ~ Replaces 45108-300-003 Caliper piston sealing ringPiston sealing ring referencing Honda 45108-300-003, listed for the 1974-78 CB550K front caliper.View part Honda CB750 / CB550 / CB500 / CB450 Front Caliper Adjuster Set ~ Replaces 45117-341-700 Caliper adjuster setBolt, spring, washer and nut for pad adjustment; four Honda numbers covered in one set.View part

Related parts: Complete front caliper assembly · Caliper bleed screw · Caliper bolt and washer set

Piston orientation

The piston listing gives 38.15mm diameter, 34mm height and a 2mm outer lip that faces the brake pad. Compare those details with the removed piston. Check the separate sealing ring and use the appropriate service instructions for inspection, assembly and bleeding.

Bleed screw caps

Rubber bleed-screw caps are separately listed in single and ten-pack options. Compare the fitted bleed screw and the number of caps actually needed before choosing a pack. A cap purchase is separate from the bleed screw and the caliper's other replacement parts.

Caliper FAQs

What size is the caliper piston?

It measures 38.15mm across and 34mm tall, and stands in for Honda 45107-323-020. CB550K bikes of 1974-78 appear in its fitment along with several smaller Honda models.

What does the complete caliper include?

The aftermarket assembly lists body, pads, piston, piston rubber, bleed screw, bolts and bleed cap. It references Honda 45100-390-405 and names the 1974-78 CB550K. Compare the original assembly and note that final assembly may be required before installation.

What is in the caliper bolt set?

Two bolts and two washers, standing in for Honda 90165-323-000. Its fitment covers 1974-78 CB550K bikes as well as the CB500K and the CB550F Supersport models.

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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