FMF Fatty Pipe & Powercore 2 silencer & VForce Reed for 2005-2021 Yamaha YZ125

Gold Series Fatty Exhaust Pipe&PowerCore 2 Silencer&Moto Tassinari VForce4R reed valve

NOTE:This mufflerDOES NOThave a spark arrestor

FITS:

GOLD SERIES FATTY EXHAUST PIPE

With well over 35 years of racing experience behind it, the Fatty Gold Series pipe delivers race proven performance. The Fatty broadens and smooths out the power curve while boosting gains throughout the entire power band, more low-end, more mid, and increased over-rev. No matter what type of riding you do, the Fatty has the benefits youre looking for.

• More tractable power, improved throttle control
• Provides power gains throughout entire power band
• Carbon steel with a nickel plated finish for maximum durability
• FMF Racings Tru-Flo stamping process ensures a perfect fit and optimum performance.
• Can be used with FMF or stock silencer
• FMF’s most popular 2-stroke pipe

POWERCORE 2 SILENCERThe Powercore 2 is the measure which others aim for. With its lightweight extruded aluminum oval canister mated to a perforated core, this silencer is above the competition. The Powercore 2 silencer provides a strong performance edge for any 2-stroke machine and the performance flow end cap and front stinger are stainless steel for unbeatable durability and an unmatched look.
NOTE 1:This muffler DOES NOT have a spark arrestor
NOTE 2:The image used is for display purposes only and may not represent the actual product for every model.

VForce4R REED VALVE

The unique design of the VForce reed valve system features double the reed tip surface over a conventional reed valve design. This has two major benefits: 1) The reed petals only travel half the distance as a conventional reed valve design to get the same airflow. 2) Because the reed petals only need to travel half the distance of that on a conventional reed valve design, there is a greater chance of them being fully opened as well as a better chance of sealing when they are “closed”. A reed petal never truly “closes” in a classic sense, as it is always in movement. Consider this, an engine operating at 8,000 RPM results in a reed petal opening and closing 133 times in one second. This fact, sheds light on another VForce advantage. Since the petals are only traveling half the distance, they generally last longer are they receive less wear than the reed petals on a conventional reed valve design.

• Double the reed tip surface over a conventional reed valve design
• Greater efficiency due to reduced reed petal travel
• Screw free design eliminates risk of screws going through motor

IIMPROVED VFORCE4 FEATURES

• All-new reed petal resin system, carbon fiber and lay-up
• Pre-curved reed petal ensures better seal at tip
• Wider reed cage for maximum airflow
• Combined reed tip area increased by 10.5% resulting in increased total air flow
• Airfoil shape added to cage tip to increase air velocity from outer ports
• Long reed stops added to progressively slow petal tip velocity, for increased petal durability
• Reduced frontal area of central wing by 15.6% combined with a more aerodynamic shape

ALL-NEW VFORCE4R FEATURES

• Rubber overmodling on reed tip surface of cage to further enhance petal life
• Pre-curved reed petal ensures better seal at tip

WHAT’S INCLUDED WHEN I PURCHASE THE VFORCE4R REED VALVE SYSTEM?

Moto Tassinari and VForce4R decals, detailed installation instructions, complete VForce4R reed valve system (including reed petals) and gaskets.

In 1973 Don Emler created FMF out of a desire to go faster. For nearly fifty years FMF has been leading in the pursuit of precision, power and speed.