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1981 Honda CB650 Piston Rings & Pins

Measure before ordering piston parts for your 1981 Honda CB650. The standard ring set covers one piston, while pins and clip pairs are separate choices. A previously rebuilt engine may need a different size from the original application.

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Honda CB Piston Pin Clips 15mm Pk/2 ~ Replaces 94601-15000

Honda CB Piston Pin Clips 15mm Pk/2 ~ Replaces 94601-15000

$1.95 USD
05-7201
Secure your piston pins with this 2-pack of 15mm Piston Pin Clips, Japanese made to superior quality and replacing OEM Ref. #94601-15000. Exceptionally broad...
Honda CB750 CB650 CB550 tappet adjuster screw and nut set 90012-426-000

Honda CB Tappet Adjuster Screw & Nut Set ~ Replaces 90012-426-000

$4.61 USD
49-0784
Replace your tappet adjuster screws and nuts with this Tappet Adjuster Screw & Nut Set. Each set includes one tappet adjuster screw and one...
Honda CB650 CB650C CB650SC piston ring set (standard size) 13011-426-004

1979-82 Honda CB650 / CB650C / CB650SC Piston Ring Set (Standard Size) ~ Replaces 13011-426-004

$34.95 USD
73-1024
Rebuild your CB650 cylinders with this Standard-Size Piston Ring Set, OEM #13011-426-004 (Std.). Japanese-made, superior quality.Note: this set includes piston rings to rebuild one...
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Honda CB650 CB550 CB500 piston pin 13111-440-000

Honda CB Genuine Honda Piston Pin ~ OEM 13111-440-000 / 13111-286-000

$18.95 USD
99-5321
Upgrade or restore your classic Honda motorcycle with this Genuine Honda Piston Pin — precision‑engineered and made in Japan. This authentic replacement fits and...
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1981 Honda CB650 · Piston Rings & Pins Buying guide

Count piston parts after measuring

Standard-size rings, a genuine Honda piston pin and paired retaining clips address distinct pieces of the piston assembly. Choose them from the inspected parts and measured engine, not the year alone.

Parts to consider

1979-82 Honda CB650 / CB650C / CB650SC Piston Ring Set (Standard Size) ~ Replaces 13011-426-004 Standard piston ring setJapanese-made rings for one piston; four sets cover all four pistons.View part Honda CB Genuine Honda Piston Pin ~ OEM 13111-440-000 / 13111-286-000 Genuine Honda piston pinGenuine Honda pin with references 13111-440-000 and 13111-286-000.View part

Related parts: 15mm piston-pin clip pair

One piston at a time

Each standard ring set contains the rings to rebuild one piston. Order four sets only when all four pistons require that standard-size set. Cylinder and piston inspection must come first; do not assume a used engine has never been rebored.

Keep pins and retainers on the list

The genuine Honda pin is sold individually: four pins replace all four. The separate pack contains two 15mm clips, enough for one compatible piston; four packs supply eight clips for all four pistons. Match the piston and pin-retaining arrangement before ordering, especially with aftermarket pistons. Rings, pins and clips are separate products.

Ordering questions

How many ring sets do I need for all cylinders?

Four standard-size sets cover all four pistons. That quantity is appropriate only after confirming the fitted pistons and cylinder measurements call for the offered standard-size rings.

What should be inspected before buying replacement piston pins?

Measure pin-to-piston-bore clearance and inspect the connecting-rod small end for scoring or looseness. Match the pin diameter and piston application before ordering, and replace the specified retaining clips rather than reusing removed clips.

Will standard rings work in an oversize piston?

Do not order them on that assumption. Identify the piston markings and measure the cylinder and ring requirements; this guide selects the standard-size set, not an oversize alternative.

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Send your model and year, plus photos of your existing part and any changes to the original setup.

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