Take your early CB750K cylinders to a 0.25mm oversize bore with this 1st Oversize Piston Kit (+0.25mm). Japanese made to superior quality, replacing OEM Ref. #13102-300-030. Kit includes the piston, piston pin, and piston pin clips (pair). Piston rings are NOT included, order separately.
Note: this kit rebuilds one piston. 4 kits needed for a full 4-cylinder rebuild.
Key Features
• 1st oversize (+0.25mm) piston kit
• Includes piston, piston pin, and pin clips (pair)
• Replaces OEM #13102-300-030
• Japanese made, superior quality
• Rings sold separately
• One piston per kit
• Honda part name: Piston (Os 0.25)
• Interchangeable with Honda 13102-300-020
Fitment / Compatibility
• Honda CB750K (1969‑76)
Part Number: 05-7101
Check the listed model and year, then read any fitment notes in the description.
| Make | Model | Year |
|---|---|---|
| Honda | CB750K Standard | 1969 |
| Honda | CB750K | 1970 |
| Honda | CB750K | 1971 |
| Honda | CB750K | 1972 |
| Honda | CB750K | 1973 |
| Honda | CB750K | 1974 |
| Honda | CB750K | 1975 |
| Honda | CB750K | 1976 |
No listed models match your search.
Free ground shipping over $50
To the USA & Canada. In-stock orders usually ship from our own warehouse the same or next business day.
| Destination | Delivery time |
|---|---|
| USA | 4–7 business days |
| Canada | 2–6 business days |
Ground shipping includes tracking, emailed when your order ships. Need it sooner? Express options are available at checkout.
60-day returns on eligible parts
No restocking fees. Eligible parts must be unused, uninstalled, unaltered and complete. The 60-day window starts when your order is delivered.
Electrical parts are excluded from standard returns. Check return eligibility.
Start your return below. Wait for our instructions before mailing a part back.
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Canada Post Economy: Available at checkout for select small items. Allow 1–3 weeks for delivery. No tracking or insurance is included.
Outside the USA & Canada: Delivery times vary by destination and shipping method. Buyers are responsible for applicable duties, taxes and import fees. We cannot mark orders as gifts.
Frequently Asked Questions
How many +0.25mm CB750 piston kits are included and required?
One Japanese-made first-oversize piston, piston pin and pair of pin clips are included for one cylinder. Four kits are required to replace all four pistons in a 1969-1976 CB750K engine.
Are piston rings included with +0.25mm piston kit 05-7101?
No. Matching first-oversize +0.25mm piston rings are sold separately; one ring set is required for each piston.
What machining is required for Honda piston 13102-300-030?
Have each cylinder measured and bored or honed to the actual +0.25mm piston using the Honda piston-to-cylinder clearance. Also verify ring end gap, piston-pin fit and correct pin-clip seating during assembly.