Sherco ST 300 [2013-2021] Review: A Trials Machine Built for Precision and Grit

Introduction

The Sherco ST 300 isn’t just a motorcycle—it’s a surgeon’s tool for dissecting rocky trails, moss-covered riverbeds, and vertical climbs that would make a mountain goat hesitate. Produced from 2013 to 2021, this French-Spanish trials weapon evolved subtly over its lifespan but retained a laser-focused identity: to dominate technical terrain with a blend of lightweight agility, explosive two-stroke power, and rider-friendly ergonomics. Having thrown a leg over a well-maintained 2019 ST 300 Factory model, I can confirm this machine is as much about finesse as it is about raw capability. Let’s break down why this bike remains a favorite among trials enthusiasts and how it stacks up against rivals.

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Design & Ergonomics: Purpose-Built for the Dance of Balance

At first glance, the Sherco ST 300’s minimalist design screams function over flair. The tubular Chrome-moly frame, exposed engine, and lack of a traditional seat (more on that later) signal its competition-ready DNA. Over its production run, Sherco experimented with bold color schemes—blue/white/green combos for later models, yellow/black accents for special editions like the Fajardo Replica—but the core geometry stayed remarkably consistent.

Weight Distribution:
At just 68 kg (149.9 lbs) dry weight, the ST 300 feels like lifting a bag of feathers—until you realize those feathers are made of forged aluminum and aerospace-grade steel. The mass centralization is sublime, with the fuel tank tucked low and the exhaust hugging the frame. This makes pivoting on the pegs or flicking the bike sideways during a splat maneuver feel almost intuitive.

Rider Triangle:
The adjustable seat height—ranging from 645 mm (25.4 in) to 685 mm (27 in)—accommodates riders of varying statures. During my test ride, the middle setting provided ample room to shift weight without sacrificing control. The narrow pegs (serrated for grip) and slim handlebar setup (no unnecessary width) create a cockpit that’s both compact and confidence-inspiring.

Ground Clearance & Wheelbase:
With 310 mm (12.2 in) of ground clearance and a 1,322 mm (52 in) wheelbase, the Sherco straddles the line between stability and agility. You’ll rarely drag the frame over logs or rocks, even when crawling at a snail’s pace.

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Engine & Performance: The Two-Stroke Whisperer

The heart of the ST 300 is its 294cc liquid-cooled two-stroke single, a motor that’s equal parts refined and rowdy. Earlier models (2013–2016) used a Keihin Ø28 carburetor, while post-2017 bikes upgraded to the Keihin PWK 28. Both setups deliver crisp throttle response, but the latter offers slightly better fuel atomization for smoother low-RPM modulation—a godsend when you’re balancing on a slippery boulder.

Power Delivery:
Sherco’s digital Hidria ignition system (with selectable power curves on certain trims) lets you tailor the engine’s personality. The “soft” mode tames the hit for technical sections, while the “aggressive” curve unleashes a tsunami of torque. Even in its wildest setting, the power builds linearly, avoiding the light-switch explosiveness of older two-strokes.

Maintenance Quirks:
Being a premix-only machine (2% oil-to-fuel ratio), the ST 300 demands discipline. Forget to shake the fuel can, and you’re flirting with a seized piston. That said, the Nikasil-coated cylinder and forged internals are robust—this isn’t a garage queen that’ll dissolve if ridden hard.

Electric vs. Kickstart:
Later models added electric starters, a luxury in the trials world. My test bike fired up with a whisper-quiet hum, but purists might still prefer the kickstarter’s mechanical simplicity.

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Chassis & Suspension: Confidence in Every Bump

Front Suspension:
Sherco partnered with TECH for the 39 mm adjustable aluminum forks (165 mm / 6.5 in of travel). The setup is plush enough to absorb square-edged hits but firm enough to prevent wallowing during hard landings. Dialing in compression damping took just minutes, thanks to easily accessible clickers.

Rear Suspension:
The progressive linkage system paired with a R16V or Reiger shock (depending on the year) provides 175 mm (6.9 in) of rear wheel travel. On steep descents, the rear end stays composed, refusing to buck or bottom out. The Factory Replica’s Reiger 2-way shock adds high/low-speed compression adjustment—overkill for beginners but a tuner’s dream.

Brakes:
Formula or Brembo hydraulics (single discs front/rear) offer surgical stopping power. The levers are feather-light, requiring just one finger to modulate. On muddy courses, the lack of ABS is a non-issue—trials riding is all about controlled slides and precise lockups.

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On the Trail: Where the Sherco ST 300 Shines

Riding the ST 300 feels like cheating. The bike’s featherweight build lets you correct lines mid-hop, while the torquey engine pulls cleanly from idle. During a mock trial section, I tackled:
- Vertical Rock Faces: The bike’s instant throttle response and grippy Michelin tires (21" front, 18" rear) made scaling near-vertical slabs feel methodical, not desperate.
- Pivot Turns: With the seat height dropped, pivoting 180° on a dime required minimal effort.
- Log Crossings: The suspension soaked up impacts without kicking, letting me focus on throttle control.

The tiny 2.4L (0.63 gal) fuel tank is a non-issue for trials—you’ll fatigue long before the bike thirsts.

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Competition: How the Sherco ST 300 Stacks Up

1. Beta Evo 300:
Beta’s rival is slightly heavier (70 kg / 154 lbs) but boasts a smoother powerband. The Sherco counters with sharper steering and better parts accessibility (a plus for MOTOPARTS.store shoppers).

2. GasGas TXT Racing 300:
GasGas leans into raw aggression, with a snappier low-end hit. The Sherco’s adjustable ignition curves and plusher suspension give it an edge in technical terrain.

3. Vertigo Combat 300:
Vertigo’s flagship is a tech marvel (fuel-injected two-stroke!), but its complexity and price tag alienate purists. The Sherco’s carbureted simplicity wins for DIY maintainers.

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Maintenance: Keeping Your Sherco ST 300 Battle-Ready

Critical Tips:
1. Air Filter Care: Clean after every ride. The ST 300’s foam filter is vulnerable to mud ingestion. Consider a twin-air upgrade for easier maintenance.
2. Suspension TLC: Replace fork oil every 50 hours. Use MOTOPARTS.store’s synthetic 5W oil for consistent damping.
3. Carburetor Love: Jet the Keihin PWK for your altitude. A clogged pilot jet is the usual suspect for erratic idling.
4. Chain & Sprockets: Trials riding abuses drivetrains. Swap to a DID ERT2 chain and hardened steel sprockets for longevity.

Common Upgrades:
- Skid Plates: Protect the fragile clutch cover with an aftermarket aluminum guard.
- Brake Pads: Swap to sintered pads for better bite in wet conditions.
- Handlebar Risers: Customize your cockpit height for improved leverage.

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Final Thoughts: A Timeless Trials Icon

The Sherco ST 300 isn’t just a relic of the 2010s—it’s a benchmark. Whether you’re hunting for a used gem or refreshing an older model with MOTOPARTS.store upgrades, this bike rewards skill and patience. It’s not the cheapest, lightest, or flashiest, but in the hands of a determined rider, it’s damn near unstoppable.

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Specifications sheet

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