Beta RR 50 Enduro Sport 2T (2018–2022): A Pocket-Sized Trail Warrior
Introduction
The Beta RR 50 Enduro Sport 2T isn’t just a motorcycle—it’s a gateway to adrenaline-fueled off-road adventures. Designed for younger riders or those restricted by licensing requirements, this 50cc two-stroke enduro bike punches far above its weight class. Built between 2018 and 2022, it represents Beta’s commitment to creating race-ready machines even in the smallest displacements. After spending a day carving through muddy trails and rocky inclines on this Italian-made thumper, it’s clear this bike is more than just a learner machine—it’s a serious off-road tool with a playful soul.
Engine Performance: Two-Stroke Simplicity Meets Modern Refinement
At the heart of the RR 50 beats a 49.7cc liquid-cooled single-cylinder two-stroke engine—a configuration that’s become rare in an era dominated by four-strokes. The engine’s bore and stroke (40.3 x 39mm / 1.6 x 1.5 inches) are nearly square, favoring mid-range punch over peaky high-RPM power. With a 12.1:1 compression ratio and a 28mm carburetor, this engine delivers a satisfying bark that’s music to any dirt rider’s ears.
The power delivery is surprisingly tractable for a two-stroke. There’s no violent hit—just a linear surge from 5,000 RPM onward, maxing out around 11 HP. Fuel consumption sits at 2.4 L/100km (98 MPG), though this depends heavily on how hard you wring its neck. The six-speed transmission shifts with rifle-bolt precision, and the wet multi-disc clutch offers just enough slip for technical sections without feeling vague.
What’s most impressive is the liquid cooling system. Even after repeated hill climbs in 30°C (86°F) heat, the bike never showed signs of overheating—a common issue with air-cooled 50cc competitors.
Chassis and Suspension: Big-Bike Credentials in a Compact Package
Beta’s steel double-cradle frame strikes a perfect balance between flex and rigidity. At 85 kg (187 lbs) dry, the RR 50 feels almost weightless when flicked through switchbacks. The geometry—1,410–1,428mm (55.5–56.2") wheelbase and 325–330mm (12.8–13") ground clearance—gives it the stability of a trials bike crossed with a motocrosser.
The suspension evolved during this generation:
- Front: Hydraulic fork with 37–40mm shafts (depending on model year) offering 210–245mm (8.3–9.6") travel
- Rear: Monoshock with 200–245mm (7.9–9.6") wheel travel
On rocky descents, the setup absorbs square-edge hits like a much larger enduro bike. The 21"/18" wheel combo (front/rear) rolls over roots and ruts effortlessly, while the 220mm (8.7") disc brakes provide ample stopping power—though some test riders swapped pads for more aggressive compounds.
Off-Road Performance: Where the RR 50 Shines
Slide onto the 920–928mm (36.2–36.5") seat—tall for beginners but perfect for aggressive riding—and the bike disappears beneath you. The narrow waist lets you grip the frame with your knees, crucial when tackling off-camber trails.
In tight singletrack, the RR 50 is a revelation. The 80/90-21 front and 110/80-18 rear tires (standard knobbies) dig into soft terrain without packing up. During our test ride, the bike scaled a 45-degree mudslide that stalled several 250cc four-strokes—proof that lightweight (and rider skill) often trump raw power.
The 6L (1.72 US gal) fuel tank limits range to about 250km (155 miles) of trail riding. Carry extra fuel if you’re venturing deep into the backcountry.
Competition: How It Stacks Up
The 50cc enduro segment is niche but fiercely contested. Here’s how the Beta compares:
- KTM 50 SX:
- Sharper powerband suited for motocross
- Air-cooled engine requires more maintenance
-
Lacks the Beta’s trail-friendly gearing
-
Husqvarna EE 5:
- Electric start (unavailable on Beta)
- Heavier at 89kg (196 lbs)
-
More expensive to maintain
-
Cobra ECX5:
- Race-oriented with adjustable power valve
- Harsher suspension for recreational use
- Limited dealer network
The Beta splits the difference between playbike and racer. It’s not the fastest 50cc, but its liquid cooling, robust chassis, and plush suspension make it ideal for all-day trail rides.
Maintenance: Keeping Your RR 50 Razor-Sharp
As a MOTOPARTS.store journalist, I must emphasize: two-strokes live or die by their maintenance. Here’s your cheat sheet:
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Oil Mixing:
The mechanical oil pump (50:1 premix) works well, but carry a ratio rite cup. We recommend MOTOPARTS.store’s synthetic 2T oil for cleaner combustion. -
Air Filter Care:
Clean every 15 hours using our bio-degradable filter cleaner. In dusty conditions, apply filter grease to the seal. -
Suspension Service:
Replace fork oil every 100 hours. Upgrade to our high-viscosity oil for heavier riders. -
Brake Upgrades:
Swap stock pads for sintered metal pads in muddy conditions. -
Chain Maintenance:
The O-ring chain lasts 500+ km with regular MOTOPARTS.store chain lube applications.
Conclusion: Small Bore, Big Fun
The Beta RR 50 Enduro Sport 2T defies its diminutive displacement. It’s a bike that grows with the rider—forgiving enough for novices yet capable enough to embarrass larger machines in technical terrain. While the kick-start-only system and carburetor feel old-school next to EFI/electric-start competitors, that simplicity means fewer electronics to fail mid-trail.
Whether you’re upgrading from a playbike or want a lightweight companion for hard enduro, the RR 50 delivers grins per euro like few others. And when it’s time to personalize or refresh your steed, MOTOPARTS.store has every gasket, sprocket, and tire you’ll need to keep this pocket rocket flying.
