Yamaha Valve Guide – Trumpet / Cornet / Flugel – A0141090

The Yamaha A0141090 Valve Guide is a genuine Yamaha OEM replacement guide for Yamaha piston brass, used on a wide range of Yamaha Bb trumpets, cornets, flugelhorns, marching brass, and alto horns. 

The valve guide locks into a channel inside the valve casing and keeps the piston correctly aligned as it moves. When the guide wears down, breaks, or goes missing, the valve can start to rotate, stick, or lose alignment — which affects airflow, response, and even tuning consistency. Replacing the guide restores smooth, reliable valve action. 

This is an original Yamaha part (not an aftermarket copy). That means the dimensions and shoulder profile match Yamaha’s factory tolerances, which is important for proper valve alignment and quiet, fast valve return. 

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

Key Features

• OEM Yamaha part
  Supplied as an original Yamaha valve guide under ref. A0141090 / Y-A0141090. Using OEM parts helps the valve line up exactly as Yamaha intended, rather than guessing with generic guides. 

• For Yamaha trumpet, cornet, flugelhorn, and more
  This guide is used across a long list of Yamaha piston brass models, including popular student and intermediate Bb trumpets like YTR-2330 / YTR-2335 / YTR-3335 / YTR-4335G, Yamaha cornets such as YCR-2310 / YCR-2330 / YCR-4330G, Yamaha flugelhorns like YFH-6310Z, and even Yamaha marching / alto horn models (YMP/YAH series). 

• Stops valve rotation
  The guide’s tab sits in the casing slot and prevents the piston from spinning. If your valve turns and no longer “clicks into place,” the guide is often worn or cracked. Replacing it immediately improves alignment and playability. 

• Restores alignment and response
  Good valve alignment keeps the internal ports lined up with the slides. Misalignment can affect response, tone evenness, and resistance. Yamaha specifically emphasises that accurate valve alignment is critical for consistent feel and clean airflow across the instrument. 

• Standard Yamaha ‘stepped’ profile
  Yamaha uses slightly different guide shapes for different series. A0141090 is typically the “standard” style guide (stepped profile) used on student / standard Yamaha trumpets, versus the flat brass guides found in some Yamaha pro / Xeno models. 

• Easy workshop fix
  Valve guides are normal wear items. Brass and school band techs replace them alongside felts and springs during routine servicing to bring noisy or sticky valves back to life without a full mechanical overhaul. 

• 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

If a valve won’t stay aligned, starts sticking, or you hear scraping or clicking when you press and release, it’s often the guide.
A fresh A0141090:

• Keeps the piston from rotating in the casing.

• Helps the ports line up correctly so the instrument speaks evenly in every valve combination.

• Reduces mechanical noise that close mics (or bandmates) can hear. 

This is exactly the fix band departments and hire fleets do on Yamaha student and intermediate brass: swap the worn guide(s), clean and oil the valves, replace felts/springs if needed, and the horn usually feels “tight” again straight away. 

Ev-Entz Music is an independent, family-run brass and woodwind specialist. If you’re unsure whether A0141090 is correct for your Yamaha model, just ask before ordering — Yamaha uses different guide styles across Standard, Pro, and Xeno series. 

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 Guide

• Manufacturer: Yamaha

• Yamaha Part Code / Ref: A0141090 (also listed by some suppliers as Y-A0141090) 

• Instrument family: Yamaha piston brass (trumpet, cornet, flugelhorn, marching brass / alto horn, valve trombone variants in Yamaha marching lines) 

• Function: Locks into the valve casing slot to stop valve rotation, maintain correct port alignment, and support smooth, consistent valve action. 

• Typical models covered (examples):

  • Trumpet / Cornet: YTR-1310, YTR-1335, YTR-2330, YTR-2335, YTR-3335, YTR-4335G / GS, YCR-2310, YCR-2330, YCR-4330G

  • Flugelhorn / Marching / Alto Horn: YFH-6310Z, YMP-202M series, YAH-203 series

  • Many Yamaha 2xx / 3xx / 4xx school and band instruments, plus marching brass lines
    (If in doubt, confirm your exact model marking before purchase.)

• Material: Yamaha supplies these guides in durable molded nylon / plastic for standard models; some pro / Xeno lines use flat brass-style guides instead. A0141090 is the stepped “standard” style. 

• Supplied as: 1x valve guide (single piece). Some suppliers also sell sets of 3 or 4 for full valve sets. 

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