🏷️ Basic Information Identification Make: Aprilia Model: SR50 Year: 2005 Codes Chassis Code: AM55 Engine Code Indicator: Not explicitly stated, but likely variant-specific 📋 Manual Details Coverage Areas General Service: Included Maintenance: Included Troubleshooting: Included Engine Overhaul: Included Electrical System: Included Chassis Components: Included Suspension: Included Brakes: Included Cooling System: Included Fuel System: Included Exhaust System: Included Bodywork: Included All Models Trims Engines: Yes Page Count Estimated Page Count: Varies by specific edition, typically 200-400 pages Manual Type Type: Workshop Repair Service Manual Language Language: English (assumed from typical availability) Format Format: PDF Download ⚙️ Engine Specifications Primary Engine Engine Type: Two-stroke, single-cylinder Displacement: 49.4 cc Bore X Stroke: 39.0 x 41.8 mm Cooling System: Liquid-cooled Ignition System: Electronic, CDI Starter System: Electric and kick starter Fuel System Carburetor Type: Dell'Orto PHVA 17.5 Fuel Type: Unleaded gasoline Oil Mixing: Automatic oil injection system Performance Max Power Output: Approx. 5.0 - 5.7 HP (varies by market/tuning) 🔧 Transmission Standard Transmission Type: Automatic CVT (Continuously Variable Transmission) Clutch Type: Centrifugal, dry Features Gear Reduction: Integrated final drive with helical gears 📐 Dimensions Exterior Length: Approx. 1840 mm Width: Approx. 720 mm Height: Approx. 1170 mm Wheelbase: Approx. 1310 mm Weights Dry Weight: Approx. 92 kg Gross Vehicle Weight Rating: Not specified, but typically around 250-300 kg 🛡️ Safety Features Features Brakes Front: Hydraulic disc brake Brakes Rear: Hydraulic disc brake Lighting System: Halogen headlight, LED tail light, indicators Tires Front: 120/70-13 (typical, check manual for exact spec) Tires Rear: 130/60-13 (typical, check manual for exact spec) Suspension Front: Telescopic fork Suspension Rear: Monoshock absorber 🔧 Maintenance Service Intervals Engine Oil Change: Every 3,000 km or 1 year (check manual for specifics) Gearbox Oil Change: Every 6,000 km or 2 years (check manual for specifics) Spark Plug Replacement: Every 5,000 km or 1 year (check manual for specifics) Air Filter Cleaning Replacement: As needed, typically every 3,000 km (check manual for specifics) Fluid Specifications Engine Oil Type: API TC, JASO FD, Fully synthetic 2-stroke oil Engine Oil Viscosity: SAE 10W-40 (check manual for operating temperature range) Gearbox Oil Type: SAE 80W-90 API GL-4 Gear Oil Coolant Type: Ethylene glycol based antifreeze (50% mix with distilled water) Brake Fluid Type: DOT 4