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1981 Honda CB900F Valve Shims & Valvetrain

Valve-clearance service and cylinder-head rebuilding call for different 1981 CB900F parts. Individual 25mm shims let you buy measured thicknesses, while the assortment keeps several sizes together. Valve seals, intake and exhaust valves, and guides belong to a separate assessment of head condition.

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Honda CB1100 CB1000 CB900 CB750 valve shim 2.65

Honda CB1100 / CB1000 / CB900 / CB750 Valve Shim ~ 2.65

$8.19 USD
17-9265
Dial in valve clearances with this Valve Shim, 2.65 size, 25mm diameter.Sold each, order the quantity you need.Key Features• Valve shim• 2.65 size• 25mm...
Honda CB1100 CB1000 CB900 CB750 valve shim 2.70

Honda CB1100 / CB1000 / CB900 / CB750 Valve Shim ~ 2.70

$8.19 USD
17-9270
Tune your valve clearances with this Valve Shim, 2.70 size, 25mm diameter.Sold each, order the quantity you need.Key Features• Valve shim• 2.70 size• 25mm...
Honda CB1100 CB1000 CB900 CB750 valve shim 2.75

Honda CB1100 / CB1000 / CB900 / CB750 Valve Shim ~ 2.75

$8.19 USD
17-9275
Adjust your valve clearances with this Valve Shim, 2.75 size, 25mm diameter.Sold each, order the quantity you need.Key Features• Valve shim• 2.75 size• 25mm...
Honda CB1100 CB1000 CB900 CB750 valve shim 2.80

Honda CB1100 / CB1000 / CB900 / CB750 Valve Shim ~ 2.80

$9.38 USD
17-9280
Fit a 2.80 valve shim on your DOHC CB with this Valve Shim, 2.80 size, 25mm diameter.Sold each, order the quantity you need.Key Features•...
Honda CB1100 CB1000 CB900 CB750 valve shim 2.85

Honda CB1100 / CB1000 / CB900 / CB750 Valve Shim ~ 2.85

$9.38 USD
17-9285
Tune your valve clearances with this Valve Shim, 2.85 size, 25mm diameter.Sold each, order the quantity you need.Key Features• Valve shim• 2.85 size• 25mm...
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Honda CB1100 CB1000 CB900 CB750 valve shim 2.60

Honda CB1100 / CB1000 / CB900 / CB750 Valve Shim ~ 2.60

$8.19 USD
17-9260
Fit a 2.60 valve shim on your DOHC CB with this Valve Shim, 2.60 size, 25mm diameter.Sold each, order the quantity you need.Key Features•...
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Honda CB1100 CB1000 CB900 CB750 valve shim kit

Honda CB1100 / CB1000 / CB900 / CB750 Valve Shim Kit

$159.95 USD
73-0172
Service your DOHC CB valves with this 20-Piece Valve Shim Kit with plastic case. 25mm diameter valve shims. Includes 2 of each of the...
Honda CB1100 CB1000 CB900 CB750 valve shim 2.90

Honda CB1100 / CB1000 / CB900 / CB750 Valve Shim ~ 2.90

$9.38 USD
17-9290
Dial in your DOHC CB's valve clearances with this Valve Shim, 2.90 size, 25mm diameter.Sold each, order the quantity you need.Key Features• Valve shim•...
Honda CB1100 CB1000 CB900 CB750 valve shim 2.95

Honda CB1100 / CB1000 / CB900 / CB750 Valve Shim ~ 2.95

$9.38 USD
17-9295
Fit a 2.95 valve shim on your DOHC CB with this Valve Shim, 2.95 size, 25mm diameter.Sold each, order the quantity you need.Key Features•...
Honda CB1100 CB1000 CB900 CB750 valve shim 3.00

Honda CB1100 / CB1000 / CB900 / CB750 Valve Shim ~ 3.00

$9.38 USD
17-9300
Fit a 3.00 valve shim with this Valve Shim, 3.00 size, 25mm diameter.Sold each, order the quantity you need.Key Features• Valve shim• 3.00 size•...
Honda CB1100 CB1000 CB900 CB750 valve shim 2.55

Honda CB1100 / CB1000 / CB900 / CB750 Valve Shim ~ 2.55

$8.19 USD
17-9255
Fit a 2.55 valve shim on your DOHC CB with this Valve Shim, 2.55 size, 25mm diameter.Sold each, order the quantity you need.Key Features•...
Honda CB1100 CB1000 CB900 CB750 valve shim 2.50

Honda CB1100 / CB1000 / CB900 / CB750 Valve Shim ~ 2.50

$8.19 USD
17-9250
Fit a 2.50 valve shim on your DOHC CB with this Valve Shim, 2.50 size, 25mm diameter.Sold each, order the quantity you need.Key Features•...
Honda CB1100 CB1000 CB900 exhaust valve 14721-438-000

1980-83 Honda CB1100 / CB1000 / CB900 Exhaust Valve ~ Replaces 14721-438-000

$26.95 USD
73-0984
Replace your exhaust valve with this Exhaust Valve, replacing OEM #14721-438-000. Made in Japan.Key Features• Exhaust valve• Replaces OEM #14721-438-000• Made in Japan• Honda...
Honda CB1100 CB1000 CB900 CB750 valve shim 2.30

Honda CB1100 / CB1000 / CB900 / CB750 Valve Shim ~ 2.30

$7.00 USD
17-9230
Dial in your DOHC CB's valve clearances with this Valve Shim, 2.30 size, 25mm diameter.Sold each, order the quantity you need.Key Features• Valve shim•...
Sold out
Honda CB1100 CB1000 CB900 CB750 high performance kibblewhite valve spring set

Honda CB1100 / CB1000 / CB900 / CB750 High Performance Kibblewhite Valve Spring Set

$199.95 USD
73-1013
Upgrade your valve springs with this High-Performance Kibblewhite Valve Spring Set of 16. Made in the USA by Kibblewhite, who have been making high-quality...
Honda CB1100 CB1000 CB900 CB750 valve shim 2.40

Honda CB1100 / CB1000 / CB900 / CB750 Valve Shim ~ 2.40

$7.00 USD
17-9240
Fit a 2.40 valve shim on your DOHC CB with this Valve Shim, 2.40 size, 25mm diameter.Sold each, order the quantity you need.Key Features•...
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Honda CB1100 CB1000 CB900 CB750 valve shim 2.35

Honda CB1100 / CB1000 / CB900 / CB750 Valve Shim ~ 2.35

$7.00 USD
17-9235
Adjust your valve clearances with this Valve Shim, 2.35 size, 25mm diameter.Sold each, order the quantity you need.Key Features• Valve shim• 2.35 size• 25mm...
Honda CB1100 CB1000 CB900 CB750 valve shim 2.45

Honda CB1100 / CB1000 / CB900 / CB750 Valve Shim ~ 2.45

$8.19 USD
17-9245
Tune your valve clearances with this Valve Shim, 2.45 size, 25mm diameter.Sold each, order the quantity you need.Key Features• Valve shim• 2.45 size• 25mm...
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Honda CB1100 CB1000 CB900 CB750 high performance kibblewhite valve stem seal set

Honda CB1100 / CB1000 / CB900 / CB750 High Performance Kibblewhite Valve Stem Seal Set

$89.95 USD
73-1022
Upgrade your valve stem seals with this High-Performance Kibblewhite 100% Viton Valve Stem Seal Set of 16. Made in the USA by Kibblewhite, who...
Honda CB1100 CB1000 CB900 CB750 valve shim 3.05

Honda CB1100 / CB1000 / CB900 / CB750 Valve Shim ~ 3.05

$9.38 USD
17-9305
Tune your DOHC CB's valve clearances with this Valve Shim, 3.05 size, 25mm diameter.Sold each, order the quantity you need.Key Features• Valve shim• 3.05...
Honda CB1100 CB1000 CB900 CB750 valve shim 3.10

Honda CB1100 / CB1000 / CB900 / CB750 Valve Shim ~ 3.10

$9.38 USD
17-9310
Fit the largest standard valve shim with this Valve Shim, 3.10 size, 25mm diameter.Sold each, order the quantity you need.Key Features• Valve shim• 3.10...
Honda CB1100 CB1000 CB900 intake valve 14711-MB0-000

1980-83 Honda CB1100 / CB1000 / CB900 Intake Valve ~ Replaces 14711-MB0-000

$17.95 USD
73-0983
Replace your intake valve with this Intake Valve, replacing OEM #14711-MB0-000. Made in Japan.Key Features• Intake valve• Replaces OEM #14711-MB0-000• Made in Japan• Honda...
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Honda CB1100 CB1000 CB900 CB750 high performance kibblewhite intake exhaust valve guide

Honda CB1100 / CB1000 / CB900 / CB750 High Performance Kibblewhite Intake/Exhaust Valve Guide

$49.95 USD
73-1014
Upgrade your valve guides with this High-Performance Kibblewhite Intake or Exhaust Valve Guide (standard size). Made in the USA by Kibblewhite, who have been...
Honda CB750 CB900 CB1100 valve stem seal 12209-422-005

Honda CB750 / CB900 / CB1100 Valve Stem Seal

$10.95 USD
01-0135
Service your late-model CB's top end with this Valve Stem Seal, replacing OEM Ref. #12209-422-005 and made in Japan. Fits a wide range of...
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1981 Honda CB900F Supersport · Valvetrain Buying guide

Buy the thickness your measurements require

The CB900F has sixteen shim-adjusted valves. Check clearances with the engine cold, record the fitted shim thickness at each position and choose replacements from those measurements. Seals, guides, spring seats and retainers address separate cylinder-head work.

Parts to consider

Honda CB1100 / CB1000 / CB900 / CB750 Valve Shim Kit Twenty-piece shim assortment25mm diameter shims, two of each of ten listed sizes, in a plastic case.View part Honda CB1100 / CB1000 / CB900 / CB750 Valve Shim ~ 2.70 2.70 valve shim25mm diameter; sold individually for a measured 2.70 requirement.View part Honda CB1100 / CB1000 / CB900 / CB750 High Performance Kibblewhite Valve Stem Seal Set Kibblewhite Viton seal setSixteen valve-stem seals, made in the USA.View part

Related parts: Individual valve-stem seal · Shoulder-style valve guide

Measure the old shim before selecting the new one

Honda calls for measuring the removed shim with a micrometer, selecting a replacement from the service chart and rechecking clearance after the shims have seated. The twenty-piece assortment contains two each of ten listed thicknesses, so check your worksheet against its actual contents.

Seals do not restore worn guides

The sixteen-piece Kibblewhite seal set supplies oil-control seals for the valves. New seals do not correct excessive stem-to-guide clearance. Guide replacement involves precision sizing and checking valve-seat alignment; have the head measured before adding guides, valves or spring hardware.

Buying questions

Can I choose valve shims by engine noise or diameter alone?

No. The listed shims are 25mm in diameter, but their thickness must be selected from each cold clearance and the measured old shim. Use the Honda chart, then recheck the clearance after installation. A quiet engine can still need a clearance check.

Will valve-stem seals cure oil consumption from worn guides?

New seals help control oil at the valve stems, but they cannot restore excessive guide clearance or worn stems. Measure those parts and inspect the head before deciding whether the repair needs seals alone or machine-shop work.

Is the twenty-piece shim kit enough for every adjustment?

It contains two of each of ten specified sizes, not every available thickness or every quantity an engine may need. Compare your clearance worksheet with the assortment and use individual shims where the measured requirements differ.

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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