Pièces pour motos Honda
Choisissez votre modèle et l’année pour voir les pièces répertoriées pour votre moto.
Choisissez votre modèle et l’année pour voir les pièces répertoriées pour votre moto.
1981 Honda CB900F Supersport · Valvetrain Buying guide
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.
Twenty-piece shim assortment25mm diameter shims, two of each of ten listed sizes, in a plastic case.Voir la pièce
2.70 valve shim25mm diameter; sold individually for a measured 2.70 requirement.Voir la pièce
Kibblewhite Viton seal setSixteen valve-stem seals, made in the USA.Voir la pièce
Pièces connexes : Individual valve-stem seal · Shoulder-style valve guide
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.
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.
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.
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.
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.
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