FMF updates its exhaust range for the Beta 350 RX two-stroke

FMF exhaust presented for the Beta RX in the file Enduro21. Source of the image: Enduro21.

FMF has updated its exhaust range for the Beta 350 RX two-stroke. The novelty concerns both the Factory Fatty collector, the PowerCore 2.1 silencer and the TurbineCore 2.1 with spark plug cover. According to the presentation relayed by Enduro21, the objective is to improve the response to the accelerator, the revving and the general feeling of the engine, while offering parts announced as dedicated to the 350 RX.

A range designed for the Beta 350 RX

Enduro21 presents a first look at the FMF exhausts intended for the Beta 350 RX two-stroke. The range highlighted includes the Factory Fatty for the collector/expansion chamber part, the PowerCore 2.1 as a performance silencer, and the TurbineCore 2.1 in spark plug cover version.

The common point of these elements is their specific adaptation to the 350 RX. The source emphasizes a direct installation and a visual identity closer to a factory preparation than to a simple standard replacement.

Source: Enduro21

Factory Fatty: more flexibility and boost

FMF announces for the Factory Fatty a wider and smoother power curve, with better response at low revs, stronger mid-range thrust and better over-rev. The source also indicates a desire not to make the bike more difficult to ride.

In terms of construction, Enduro21 features a tube made of 20 gauge steel for performance, with reinforced areas of 19 gauge steel in the most exposed places. The collector also receives a plated FMF badge, presented as a finishing detail.

Source: Enduro21

PowerCore 2.1: a silent engine response oriented

The PowerCore 2.1 is presented as a direct replacement silencer for the 350 RX. FMF highlights better handlebar response and a cleaner power delivery, with a contained weight.

The cartridge is described with a black anodized aluminum body and an intermediate nozzle made of stainless steel. The source speaks of a lightweight construction and an internal core oriented towards performance use.

Source: Enduro21

TurbineCore 2.1: the option with spark suppressor

FMF also details the TurbineCore 2.1 Titanium, announced as U.S. Forest Service approved for legal trail use in the United States. The brand highlights direct passage operation, good durability and a more pronounced sound than that of an original configuration.

Enduro21 specifies that this silencer is announced as lighter than the stock equipment and that it can be used with FMF systems as with the original exhaust.

Source: Enduro21

For owners of Beta 350 RX two-stroke, FMF is therefore enriching the offer with three targeted parts: a Factory Fatty collector for engine response, a PowerCore 2.1 silencer for a sharper revving, and a TurbineCore 2.1 if the priority is spark plug cover. The prices remain those announced in the American source, without indication of the European or French market.

File prepared on September 7, 2026. The announcements, rates and specifications correspond to the dates and markets specified in the article.