Detail 01
Plastic construction
Light and won't dent, but it can crack if stepped on or crushed in a case.
Product detailSKU #1274115034960
YamahaYAC1640 Bb Clarinet Plastic Mouthpiece Cap
Independent shopping perspective
The Korena take
Plastic cap that protects a Bb clarinet mouthpiece tip and reed while the instrument sits in its case. Replacement part for student clarinetists.
Strong match
Who this is for
- Replacing a cap lost from a student clarinet outfit
- Keeping a spare in the case pocket
- Protecting a reed left on the mouthpiece between sessions
Consider the trade-offs
When to look elsewhere
- Players needing a ligature — this is the cap only
- Bass clarinet or saxophone mouthpieces, which are larger
- Anyone wanting metal hardware
What matters in use
The specifications, translated
Catalog numbers tell only part of the story. These are the details most likely to change how this product feels, sounds, or fits into a setup.
Detail 02
Bb clarinet sizing
Fits standard Bb soprano clarinet mouthpieces. Larger or smaller instruments in the family need their own size.
Detail 03
Cap, not a ligature
It slides over the mouthpiece; the ligature that clamps the reed is a separate part.
Detail 04
Yamaha part
Made to Yamaha's own mouthpiece dimensions, so fit is most predictable on Yamaha student clarinets.
Final check
Know before you order
- 01No ligature, reed, or mouthpiece included — cap only
- 02Fit depends on your mouthpiece's outer diameter, not the brand of clarinet
- 03Cap goes on over the reed and ligature, not under
Product questions
Before you decide
Straight answers to the questions shoppers most often ask about this product.
01Does this come with a ligature?
No. This is the cap by itself. The ligature holds the reed against the mouthpiece and is a separate purchase.
02Will it fit a non-Yamaha clarinet mouthpiece?
Often yes, since Bb clarinet mouthpieces are close in size, but the fit is only guaranteed on Yamaha's own mouthpieces.
03Can I leave the reed on under the cap?
Yes, that's what the cap is for during short breaks. For longer storage, take the reed off and let it dry.
04Does it work on a bass clarinet?
No. Bass clarinet mouthpieces are considerably bigger and need their own cap.
