This authentic OEM Honda front brake disc rotor was designed for first-generation mechanical disc brake systems used on classic 1970s lightweight single-cylinder motorcycles. Made from durable steel, the solid non-vented rotor features circular weight-reduction cutouts on the black inner mounting hub and the original “J05” factory casting stamp. It is ideal for period-correct restoration and maintains factory-style fit and braking performance with the original mechanical caliper setup. Specifications: Part Type: Front Brake Disc Rotor OEM Part Number: 45121-107-720 Factory Code: J05 Minimum Thickness: 4.0 mm Compatible Models: Honda CB125S — 1974 Honda CB125S — 1975 Honda CB125S — 1976 Verify the motorcycle’s front brake configuration before purchase, as this rotor differs from later hydraulic disc and drum brake setups.
Please verify compatibility with your specific motorcycle model before purchasing.
Cleaning Status
partially_cleaned
Cleaning Notes
Used anti rust
Worldwide shipping available
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Estimated delivery: 2-5 business days
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Items can be insured — contact us for more information
30-day return policy on most items
Items must be in original condition and packaging
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Yes, all parts with OEM numbers are genuine manufacturer parts. Check the specifications tab for the OEM number.
We offer a 30-day return policy. Items must be in original condition. See the Shipping tab for complete details.
Yes, we ship to most countries worldwide. Shipping costs and delivery times vary by location.
Parts are sold separately. We recommend professional installation for safety and warranty purposes.
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