Yamaha Trumpet Valve Spring – A0141070 (Yamaha Trumpet / Cornet / Flugelhorn)

The Yamaha A0141070 Trumpet Valve Spring is a genuine Yamaha OEM piston spring used across a wide range of Yamaha brass instruments, including many Yamaha Bb trumpets, cornets, flugelhorns, mellophones, marching brass, and alto/tenor horns. 

This spring sits inside the valve casing and controls the return speed of the piston. If your valve feels slow coming back up, feels uneven compared to the others, or won’t “pop” back reliably under fast playing, a tired spring is usually the cause. Replacing the valve spring restores fast, consistent valve action. 

This is an original Yamaha part, not a generic replacement. OEM Yamaha springs are matched to Yamaha’s bore, valve mass, and casing tolerances, so the horn responds the way Yamaha intended. 

Stock notice: Yamaha spare parts can have extended lead times when out of stock. Please contact Ev-Entz Music for an estimated availability date before ordering.

Key Features

• OEM Yamaha valve spring
  Supplied under Yamaha part code A0141070. Many retailers also list it specifically as “Yamaha Trumpet Valve Spring,” “Valve Spring – Yamaha Trumpet / Cornet / Flugel,” or “Yamaha OEM valve springs.” 

• Wide model compatibility
  This spring is used in a large number of Yamaha piston brass models: Yamaha student and intermediate Bb trumpets (such as the YTR-2320 / YTR-2335 / YTR-2330 line and later), Yamaha cornets (YCR-2310 / YCR-2330 / YCR-4330G etc.), Yamaha flugelhorns (e.g. YFH-2310 / YFH-6310Z), Yamaha mellophones and marching alto horns (YMP and YAH series), and similar Yamaha marching brass. 

• Fast, reliable return
  The spring provides the upward force that returns the valve after each press. A worn spring can feel slow or uneven from valve to valve. Fresh springs get the action feeling snappy again, which matters for technical passages and section work. 

• Quiet, controlled feel
  Proper spring tension helps the piston come home cleanly without harsh mechanical “clack,” especially when combined with good felts and guides. Yamaha service kits often replace springs at the same time as felts, guides, and water key corks to restore a quiet, tight-playing horn. 

• Correct Yamaha spec
  The commonly listed physical spec for this spring is approx. 9.0 mm outside diameter and ~39 mm free length (9 mm x 39 mm). This matches standard Yamaha “top inner sprung” trumpet / cornet / flugel layouts. 

• Lead time notice
  Yamaha spare parts can have extended lead times when out of stock. Please contact Ev-Entz Music for an ETA.

Why Choose This Part

Valve springs are wear items. On school and band instruments that get daily use, they can lose tension, bend, or break. That leads to sluggish valves, noisy action, and valves that don’t return cleanly.

Dropping in correct Yamaha A0141070 springs will:

• Bring back fast return on every piston. 

• Keep response even across all three valves. 

• Help restore that “plays like it should” feel on classic Yamaha student/intermediate horns like the YTR-2335 and the later YTR-2330 family, which are widely used in schools and brass bands. 

This is exactly what a brass tech will do in a standard service: clean pistons, replace springs, replace felts, check valve guides, oil, and test. 
Ev-Entz Music is an independent, family-run brass and woodwind specialist, so you’re buying a known Yamaha part, not a guess.

Important: Yamaha spare parts can have extended lead times when out of stock. Please contact us for an estimated availability date.

Specifications

• Part name: Valve Spring / Piston Spring

• Yamaha part code / SKU: A0141070 (often sold in sets of 3 for a full instrument) 

• Instrument family: Yamaha piston brass – Bb trumpet, cornet, flugelhorn, mellophone / marching horn, alto horn (YMP / YAH series), and related Yamaha marching brass. 

• Typical models covered (examples):

  • Yamaha YTR-2320, YTR-2335, YTR-2330 series trumpets (student/intermediate Bb trumpet lines). 

  • Yamaha YCR-2310 / YCR-2330 / YCR-4330G series cornets. 

  • Yamaha YFH-2310 and YFH-6310Z flugelhorn families. 

  • Yamaha marching alto / mellophone / marching French horn (YMP, YAH, YHR marching series). 

• Dimensions (typical listing): ~9 mm outer diameter x 39 mm free length (9.0 x 39 mm). 

• Configuration: For Yamaha “top inner sprung” piston designs (spring above the piston inside the top cap, standard on many Yamaha student / band horns). 

• Supplied as: Usually sold individually or as a set of 3 springs for a full instrument. 

• Manufacturer: Yamaha (Yamaha Music Europe / Yamaha Corporation).

• Stock / lead time: Yamaha spare parts can have extended lead times when out of stock. Please contact Ev-Entz Music for an ETA.