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1978 Honda CB400TII Hawk II Pistons & Rings

Cylinder measurements decide whether the standard-size piston kit suits your Hawk II. Each kit supplies the parts for one piston, so assess both cylinders before ordering and confirm that previous machining has not left the engine needing a different size.

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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 CB400TI std piston kit w rings and pin 13101-413-013

Piston Kit with Piston Rings and Pin ~ Standard Size (07-0187)

$69.95 USD
07-0187
Upgrade or rebuild your classic Honda motorcycle engine with this Standard Size Piston Kit — complete with piston, piston rings, and piston pin. This...
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1978 Honda CB400TII Hawk II · Pistons & Rings Buying guide

Measure the cylinders before choosing standard size

This is a one-piston rebuild kit for the parallel twin. Its standard-size description matters more than the fact that it appears under the correct motorcycle model.

Parts to consider

Piston Kit with Piston Rings and Pin ~ Standard Size (07-0187) Standard-size piston kitOne standard-size piston with rings, pin and clips, for the listed CB400TII application. Two kits cover both pistons when standard size is appropriate.View part

Let the measurements choose the size

A standard-size piston belongs in a cylinder that meets the relevant dimensions and condition limits. Have the bores and piston clearances assessed before buying. If machining is needed, agree the finished size with the machinist before selecting the replacement parts.

Keep each piston’s parts together

The kit supplies a piston, rings, pin and clips for one position. Keep the new and removed components identified by cylinder during inspection. Use the Honda manual for ring checks and assembly details instead of relying on a general-purpose ring-set description.

Common questions

How many kits are needed for the complete engine?

The Hawk II is a two-cylinder engine and each kit serves one piston. Order two kits for both pistons only after confirming that both cylinders are suitable for this standard-size option.

Will this work after the cylinders have been rebored?

Do not assume so. This kit is standard size. Compare the finished bore measurements and required running clearance with the piston specification before ordering for any previously machined cylinder.

Does the kit include more than piston rings?

Yes. Its one-piston contents include the piston, rings, pin and clips. Use the complete kit description when planning the order, then follow the Honda manual for the inspection and fitting checks.

Not sure which part you need?

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

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