Aprilia SX 50
The Aprilia SX 50 has a top speed of 45 km/h (restricted); approx. 80 km/h derestricted, produces 3.3 hp and weighs 97 kg.
Launched in 2006 as the supermoto sibling of the RX 50 enduro, the SX 50 pairs a liquid-cooled Minarelli/Derbi AM6-type 49.9cc two-stroke with a 6-speed gearbox and 17-inch wheels. It became one of Europe's most popular 16-year-old mopeds because it looks and handles like a scaled-down RSV/SXV supermoto while staying inside the 50cc licence class.
3.3 hp
Leistung
5 Nm
Drehmoment
97 kg
Gewicht
45 km/h (restricted); approx. 80 km/h derestricted
Höchstgeschwindigkeit
3.0 L/100km
Treibstoff
Nackt
Körper
🔧 Service Schedule & Parts
Affiliate · we may earn| Service item | Every | Typical cost | Parts |
|---|---|---|---|
| 🛢️ Engine oil + oil filter | 6,000 km / 3,500 mi or 12 mo | $20-50 | 🛢️ Buy → ⚙️ Buy → |
| 🌬️ Air filter | 4,000 km / 2,500 mi | — | 🌬️ Buy → |
| ⚡ Spark plugs | 6,000 km / 3,500 mi | — | ⚡ Buy → |
| 🔗 Chain & sprockets | 8000-15000 km (replace) | $80-160 | 🔗 Buy → |
| 🛑 Brake pads | 6000-12000 km | $25-50 | 🛑 Buy → |
| 💧 Brake fluid | 20,000 km / 12,500 mi or 2 yr | — | |
| 🧊 Coolant | 20,000 km / 12,500 mi | — | |
| 🛞 Tires | 5000-10000 km | $120-220 | 🛞 Buy → |
| 🔩 Major service | 12,000 km / 7,500 mi | $250-500 |
Was Käufer wissen sollten
Check for derestriction abuse
Almost every used SX 50 has had the restrictor, CDI or exhaust modified, which multiplies wear on the piston, clutch and gearbox. Ask for the original parts and treat a bike with an aftermarket pipe and bored cylinder as a high-mileage engine regardless of the odometer.
Known weak points
The AM6 two-stroke is prone to seizure if the oil pump or premix is neglected, and crank seals, clutch plates and the water pump seal are common failures. Teenage-owned examples often show crash damage, worn front fork seals, sloppy chain adjusters and corroded electrics/wiring around the ignition switch.
Simple but frequent service
Expect piston and ring inspection every 5,000–8,000 km, gearbox oil every 4,000 km, and regular checks of the two-stroke oil level, coolant and air filter. Parts are cheap and shared across the whole AM6 family (Derbi, Rieju, Beta, Yamaha DT50), so home maintenance is easy and inexpensive.
Top 10 Accessories
Curated picks for the Aprilia SX 50 — owned, ridden, recommended.
Häufig auftretende Probleme
🔥 2 CRITICALCompression, smoke, rattle, rebuild receipts, seller honesty
Test all six gears, listen for whine, jumping
Coolant level, weep hole drips, oily coolant residue
Cold start, lights, dash, connectors under fairings
✅Checkliste vor dem Kauf
Fun but fragile; abused examples cost real money
Full Specifications
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Discussion
Frequently Asked Questions
What are common problems with the Aprilia SX 50? +
Worn piston, rings, top end from derestriction: Compression, smoke, rattle, rebuild receipts, seller honesty (serious) | D50B0 gearbox selector and bearing failures: Test all six gears, listen for whine, jumping (serious) | Water pump seal leaks, overheating engine: Coolant level, weep hole drips, oily coolant residue (moderate)
What is the horsepower of the Aprilia SX 50? +
The Aprilia SX 50 produces 3.3 hp @ 5,250 rpm (restricted 50cc class; ~6 hp derestricted), with 5 Nm @ 5,000 rpm of torque. Top speed: 45 km/h (restricted); approx. 80 km/h derestricted.
Is the Aprilia SX 50 good for beginners? +
Yes — the Aprilia SX 50 is a reasonable choice for new riders (3.3 hp is manageable), weighing 97 kg.
Is the Aprilia SX 50 reliable? +
Owners report 2 critical issues to watch for on the Aprilia SX 50, notably: Worn piston, rings, top end from derestriction (Compression, smoke, rattle, rebuild receipts, seller honesty). Buy with a pre-purchase inspection.
Is the Aprilia SX 50 good for daily use? +
Suited for daily supermoto use — 3.0 L/100km fuel economy.
How fast is the Aprilia SX 50? +
The Aprilia SX 50 reaches a top speed of 45 km/h (restricted); approx. 80 km/h derestricted, producing 3.3 hp at 97 kg curb weight. Real-world performance depends on rider weight, gearing, and road conditions.
What gear should I buy for a Aprilia SX 50? +
Motoryk has curated a Top 10 gear list specifically for the Aprilia SX 50, covering engine oil, tires, chain, battery, and brake pads — see motoryk.com/bikes/aprilia/sx-50/top10. Each pick is matched to this bike's spec.
