Moto Tassinari VForce V4R Reed Valve System V4R04 for Yamaha YZ125 2005-2014

Moto Tassinari has extracted more power and more performance from our already proven Vforce3 reed valve system design for the 85cc market, by offering the all-new Vforce3i with integrated intake boot (included on CR, RM & YZ models only). the Vforce3i shares many of the same features as it’s legendary big brother, along with these additional unique features

Upgrade the intake performance of your Yamaha YZ125 with the Moto Tassinari VForce V4R reed valve system, manufacturer part number V4R04. Designed for 2005–2014 Yamaha YZ125 models, this performance-focused system builds on Moto Tassinari’s proven VForce reed valve technology to improve airflow, fuel-and-air distribution, throttle response, and overall engine performance.

The VForce V4R system features a newly designed reed cage and lighter reed petals that help deliver a noticeable performance increase. Its redesigned reed stops improve reed petal stability and provide more controlled opening for consistent operation. The integrated intake boot design creates a straighter path into the engine cases, promoting more even fuel-and-air distribution throughout the engine.

Feature: Straight-shot intake design helps direct airflow more efficiently into the engine cases.
Feature: Redesigned reed stops improve reed petal stability and control opening behavior.
Feature: Shorter reed cage supports the use of lighter reed petals for improved overall performance.
Feature: Custom-designed intake boot provides proper integration for compatible Yamaha 85cc and 125cc applications.
Feature: Direct-fit performance upgrade for 2005–2014 Yamaha YZ125 motorcycles.

This Moto Tassinari VForce V4R reed valve system is intended for the Yamaha YZ125 fitment listed above. Verify the motorcycle model and year before ordering to ensure proper installation. The manufacturer part number is V4R04, and the vendor part number is also V4R04.

Features:

• Straight-shot intake design helps direct airflow efficiently into the engine cases
• Redesigned reed stops improve reed petal stability and controlled opening
• Shorter reed cage allows the use of lighter reed petals for improved performance
• Custom-designed intake boot supports proper integration with compatible Yamaha applications
• Fits 2005–2014 Yamaha YZ125 motorcycles
• Brand: Moto Tassinari
• Manufacturer part number: V4R04
• Vendor part number: V4R04

Fitment:
2005 Yamaha YZ125
2006 Yamaha YZ125
2007 Yamaha YZ125
2008 Yamaha YZ125
2009 Yamaha YZ125
2010 Yamaha YZ125
2011 Yamaha YZ125
2012 Yamaha YZ125
2013 Yamaha YZ125
2014 Yamaha YZ125
2015 Yamaha YZ125
2016 Yamaha YZ125
2017 Yamaha YZ125
2018 Yamaha YZ125
2019 Yamaha YZ125
2020 Yamaha YZ125
2020 Yamaha YZ125X
2021 Yamaha YZ125
2021 Yamaha YZ125X
2022 Yamaha YZ125
2022 Yamaha YZ125X