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  • 1979-83 Honda CB750 DOHC Piston Ring Set ~ 2nd Oversize +0.50mm
Honda CB750 DOHC 2ND oversize piston ring set +0.50mm 13031-425-004
0.50 mm piston rings, SKU 05-7502: product photo and 1980 Honda CB750K (A) Crankshaft / Piston fiche with the part location highlighted. Example diagram; check listing for fitment.
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Honda CB750 DOHC 2ND oversize piston ring set +0.50mm 13031-425-004

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Load image into Gallery viewer, Honda CB750 DOHC 2ND oversize piston ring set +0.50mm 13031-425-004
Load image into Gallery viewer, 0.50 mm piston rings, SKU 05-7502: product photo and 1980 Honda CB750K (A) Crankshaft / Piston fiche with the part location highlighted. Example diagram; check listing for fitment.

1979-83 Honda CB750 DOHC Piston Ring Set ~ 2nd Oversize +0.50mm

05-7502
$24.95 USD
In stock Usually ships the same or next business day
Check model fitment View fitment
Questions about this part? Contact us 4.8/5 1,332 store reviews
Secure checkoutProtected payment
60-day returnsEligible unused parts Free ground shippingUSA & Canada over $50
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1979-83 Honda CB750 DOHC Piston Ring Set ~ 2nd Oversize +0.50mm
$24.95 USD
Description

Rebuild your DOHC CB750 at 0.50mm oversize with this 2nd Oversize Piston Ring Set (+0.50mm), Japanese made to superior quality and replacing OEM Ref. #13031-425-004. Fits the late-'70s and early-'80s DOHC CB750 lineup plus the Nighthawk.

Note: this set includes rings for one piston. 4 sets needed to rebuild all pistons.

Key Features
• 2nd oversize (+0.50mm) piston ring set
• Replaces OEM #13031-425-004
• Japanese made, superior quality
• One piston per set (4 sets for full rebuild)
• Honda part name: Ring Set, Piston (Os 0.50) (Riken)
• Interchangeable with Honda 13031-425-003

Fitment / Compatibility

• Honda CB750K (1979‑82)
• CB750F (1979‑82) Supersport
• CB750C (1980‑82) Custom
• CB750L (1979) Limited

• Honda CB750SC (1982‑83)

Part Number: 05-7502

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Check the listed model and year, then read any fitment notes in the description.

Make Model Year
Honda CB750K Standard 1979
Honda CB750F Supersport 1979
Honda CB750L Limited 1979
Honda CB750K 1980
Honda CB750F 1980
Honda CB750C Custom 1980
Honda CB750K 1981
Honda CB750F 1981
Honda CB750C 1981
Honda CB750K 1982
Honda CB750F 1982
Honda CB750C 1982
Honda CB750SC Nighthawk 1982
Honda CB750SC 1983

Free ground shipping over $50

To the USA & Canada. In-stock orders usually ship from our own warehouse the same or next business day.

Estimated ground delivery after your order ships
DestinationDelivery time
USA4–7 business days
Canada2–6 business days

Ground shipping includes tracking, emailed when your order ships. Need it sooner? Express options are available at checkout.

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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.

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Other shipping options

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 +0.50 mm DOHC Honda CB750 ring sets are needed for a full engine rebuild?

One Japanese-made ring set replacing Honda OEM 13031-425-004 services one piston. The four-cylinder DOHC CB750 requires four sets to replace the rings on all four pistons.

Can +0.50 mm piston rings be installed on a standard-size CB750 piston and bore?

No. These second-oversize rings are for a cylinder finished 0.50 mm over standard with a matching +0.50 mm piston. Measure the bore and piston and check ring end gap to the Honda service specification before assembly.

Which DOHC Honda CB750 models use the +0.50 mm ring set?

Fitment covers 1979-1982 CB750K and CB750F, 1980-1982 CB750C, 1979 CB750L, and 1982-1983 CB750SC models equipped with matching second-oversize pistons and bores.

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