Beta RR 300 (2018–2022): A Two-Stroke Enduro Masterclass

Introduction

The Beta RR 300 isn’t just a dirt bike—it’s a statement. Built for riders who demand precision, agility, and the raw thrill of two-stroke power, this Italian enduro machine carved its niche between 2018 and 2022 as a favorite among hardcore offroad enthusiasts. Unlike the flood of fuel-injected competitors, Beta stuck with a carbureted setup here, prioritizing simplicity and tunability. But does it hold up against modern rivals? Let’s dive into what makes this generation of the RR 300 tick—and why it might still be the weapon of choice for technical trails and hare scrambles.

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Engine Performance: The Heartbeat of a Two-Stroke Legend

At the core of the Beta RR 300 lies a 293.1 cc liquid-cooled single-cylinder two-stroke engine. The bore and stroke are squared at 72 mm x 72 mm, a configuration that delivers a punchy, linear powerband. With a Keihin PWK36 carburetor handling fuel delivery, the bike avoids the complexity of fuel injection, which many riders still appreciate for its mechanical purity.

Power Delivery:
Twist the throttle, and the RR 300 rewards you with a surge of torque that’s more tractor-like than its “race-bred” reputation suggests. The engine pulls cleanly from idle, making it forgiving in technical climbs or muddy ruts. There’s no explosive “hit” typical of older two-strokes; instead, power builds progressively, peaking at around 8,500 RPM. This makes it manageable for less experienced riders yet potent enough for experts.

Fuel Mix & Tuning:
Running a 2% premix ratio (50:1), the Beta sips fuel at a claimed 2.72 liters per 100 km (86.48 mpg). The 9.5-liter tank (2.51 gallons) gives a practical range of ~150 km (93 miles) under moderate riding. The carburetor is tunable for altitude and temperature, and upgrading to the optional NGK BR7EIX iridium spark plug sharpens throttle response.

Sound & Vibration:
The two-stroke’s signature rasp is muted by modern standards, but it’s still music to dirt riders’ ears. Vibration is minimal thanks to Beta’s counterbalancer, reducing arm pump during long rides.

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Handling & Suspension: Dancing Through the Dirt

Beta’s chassis philosophy has always leaned toward agility. The RR 300’s molybdenum steel double-cradle frame weighs just 103.5 kg (228 lbs) dry, creating a flickable feel that’s confidence-inspiring in tight woods or rocky terrain.

Suspension Setup:
- Front: A 48 mm Sachs USD fork (290 mm/11.4" travel) offers adjustable compression and rebound. It’s plush over roots and rocks but resists bottoming on hard landings.
- Rear: The Sachs monoshock (300 mm/11.8" travel) pairs with a progressive linkage system, balancing comfort and stability.

On the Trail:
The Beta feels like an extension of your body. The 1,482 mm (58.3") wheelbase and 320 mm (12.6") ground clearance let you pivot over logs and carve through berms with surgical precision. Even at speed, the bike remains composed, though the front end can feel light in deep sand.

Brakes:
Single 240 mm discs front and rear (with Nissin calipers) provide ample stopping power. The lever bite is firm but predictable—ideal for modulating speed on steep descents.

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Ergonomics & Comfort: Built for Battle

Rider Triangle:
The 930 mm (36.6") seat height is intimidating for shorter riders, but the narrow frame and sculpted seat make it easier to dab a foot. Standing up feels natural, with the handlebars (790 mm wide) and footpegs positioned for aggressive attack angles.

Fuel & Weight Distribution:
The fuel tank is located low in the frame, keeping the center of gravity near the rider’s knees. This makes the Beta feel lighter than its specs suggest, especially when pivoting through switchbacks.

Long-Haul Comfort:
This isn’t a couch—it’s a race bike. The seat is firm, and the pegs are set high for ground clearance. But for 2–3 hour enduro loops, the ergonomics strike a balance between control and fatigue.

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Competition: How the Beta RR 300 Stacks Up

KTM 300 XC-W

KTM’s flagship two-stroke enduro bike boasts fuel injection (since 2020) and a reputation for raw power. However, the KTM’s PDS rear suspension lacks the Beta’s linkage-driven progression, making the RR 300 more forgiving on square-edged hits. The Beta also undercuts the KTM in steering sharpness.

Husqvarna TE 300i

Sharing KTM’s engine but with a composite subframe, the Husky feels plusher in choppy terrain. Yet the Beta’s steel frame offers better feedback at the limits of traction. Carburetor loyalists will prefer the RR 300’s tunability over the Husky’s TPI injection.

Sherco SE 300 Factory

Sherco’s two-stroke is a niche favorite with exceptional suspension (Öhlins components). But the Beta counters with a broader dealer network and simpler maintenance—no need to ship parts from France.

Verdict:
The RR 300 isn’t the most technologically advanced, but its analog charm and balanced geometry make it a dark horse in technical terrain.

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Maintenance: Keeping Your Beta in Beast Mode

1. Two-Stroke Simplicity

• Premix Fuel: Always run 50:1 with high-quality synthetic oil. Beta recommends its own off-road oil, but Motorex Cross Power 2T is a popular alternative.
• Spark Plugs: The stock NGK BR7ES works reliably, but swap in a BR7EIX iridium plug for colder climates or aggressive riding.

2. Suspension Service

• Rebuild the Sachs forks every 80–100 hours. Upgrade to SKF seals for muddy conditions.
• Check rear shock pressure annually.

3. Brake Care

• DOT 4 fluid absorbs moisture—bleed brakes every 6 months. Consider Motul RBF 600 for higher boiling points.

4. Chain & Sprockets

• The O-ring chain lasts ~1,500 km (930 miles) with regular cleaning. Swap to a DID VT2 chain for longevity.

5. Cooling System

• Use Beta’s Water+ coolant or equivalent ethylene glycol mix. Check for leaks at the pump weep hole.

Pro Tip: Install a Twin Air air filter and a Boyesen Rad Valve for crisper throttle response—both available at MOTOPARTS.store.

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Final Thoughts

The Beta RR 300 (2018–2022) is a love letter to riders who value feel over frills. Its carbureted engine and steel frame might seem old-school, but they deliver a tactile riding experience that’s hard to replicate. Whether you’re threading through single-track or blasting fire roads, this Beta reminds you why two-strokes still rule the dirt.

Ready to upgrade your RR 300? Explore our curated selection of performance parts, from suspension kits to exhaust systems, at MOTOPARTS.store.

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Specifications sheet

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