Honda motorcycle parts
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1974 Honda CB360G · Front Brake Caliper Parts Buying guide
The available assembly and individual piston and seal support different repair scopes. Body condition, dimensions and prior brake changes should drive the choice; a new piston cannot establish that the rest of a damaged caliper is serviceable.
Replacement front caliperAftermarket assembly includes body, pads, piston, piston rubber, bleed screw, bolts and bleed cap. Final assembly may be required.View part
Front caliper piston38.15 mm diameter × 34 mm high, replacing reference 45107-323-020. Compare the installed caliper before ordering.View part
Caliper piston sealing ringFront caliper piston seal for reference 45108-300-003. A separate service part from the piston.View part
Related parts: Caliper bolts and washers · Front caliper bleed screw
The replacement caliper includes the body, pads, piston, piston rubber, bleed screw, bolts and bleed cap. It is sold as an aftermarket replacement for reference 45100-390-405 and may need final assembly. Check those contents before duplicating the same parts elsewhere in your order.
The separate piston references 45107-323-020 and measures 38.15 × 34 mm; the sealing ring references 45108-300-003. Compare the actual caliper first. Brake inspection, assembly and bleeding are safety-critical, so use the Honda procedure and qualified help where needed before the bike returns to service.
Final assembly may be required. The package includes the main caliper components, but the system still needs proper inspection, assembly, installation and bleeding before the motorcycle is ridden.
Yes. Both are available separately for an appropriate rebuild. Match the piston dimensions and seal reference to the installed caliper, and have the body assessed before deciding it can be reused.
The linked hardware set contains two bolts and two washers, with reference 90165-323-000. Check whether you need it separately when choosing the full caliper assembly, which already includes bolts.
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