2011 APRILIA RS4 125 Engine and transmission Specifications


Filed Under (Aprilia) by admin on 24-11-2010

Engine type: 1 cylinders, 4-stroke, Single
Displacement: 125 cc (7.64 cubic inches)
Bore × stroke: 58 mm × 47 mm (oversquare – shortstroke)
Cooling system: Water cooled
Power: 16.04 HP (11.8 kW)
Throttle: Cable operated
Valve train: DOHC, variable
Valves per cylinder: 4
Fuel and ignition
Sparks per cylinder: 1
Fuel supply system: Fuel injection
Ignition type: Digital CDI
Compression: 12.5:1
Engine mounting: Transverse
Lubrication system: Wet sump
Gear box: Manual 6-speed
Clutch: Wet, multiple discs, cable operated
Final drive: Chain
Starter: Electric
Physical measures
Length: 1953 mm
Width: 740 mm
Height: 1138 mm
Wheel base: 1350 mm
Seat height: 820 mm
Curb weight: 120 kg



Filed Under (Aprilia) by admin on 19-11-2010

DISASSEMBLING THE COMPONENTS – Never use pliers or similar tools to slacken and/or tighten nuts and bolts. Always use a suitable spanner. – Mark all connections (hoses, wiring, etc.) with their positions before disconnecting them. Identify each connection using a distinctive symbol or convention. – Mark each part clearly to avoid confusion when refitting. – Thoroughly clean and wash any components you have removed using a detergent with low flash point. – Mated parts should always be refitted together. These parts will have seated themselves against one another in service as a result of normal wear and tear and should never be mixed up with other similar parts on refitting. – Certain components are matched-pair parts and should always be replaced as a set. – Keep the motorcycle and its components well away from heat sources. ELECTRICAL CONNECTORS To disconnect the electrical connector, follow the procedures below. Failure to comply with these procedures may lead to irreparable damages to the connector and the wiring as well. If present, press the special safety hooks. ENGINE OIL DANGER Prolonged or repeated contact with engine oil may cause severe skin damage. Wash your hands thoroughly after handling engine oil. Do not release into the environment. Dispose of engine oil through the nearest waste oil reclamation firm or through the supplier. Wear latex gloves during servicing. Change engine after the first 1000 km (621 mi) and then every 6000 km (3728 mi), 2.11.2. (Recommended) oil fork , see 1.8.1. FRONT FORK OIL DANGER Modifying the suspension settings or the viscosity of the front fork oil will affect its response. Standard oil viscosity: SAE 20 W. Choose the oil viscosity to determine the type of response required (SAE 5W for a softer suspension, 20W for a stiffer suspension). The two grades can also be mixed in varying solutions to obtain the desired response. F.A. or Fork have special properties, which enable them to retain virtually the same viscosity regardless of temperature to give constant damping response

Aprilia's Dorsoduro 750 Compare With Ducati's Hypermotard 796


Filed Under (Tips and Review) by admin on 16-11-2010

Mid-Size Italian Supermotos— Aprilia’s excellent Dorsoduro 750 vs. Ducati’sbrand-new Hypermotard 796 20 Japanese Rider Training Examined — Rigorous training & tiered licensing, because size matters 23 BMW Paralever Pivot Maintenance &Upgrade— Howto replace fragile needle bearings with Oilite bushings 26 Trail Tools— What to pack and how to carry it when you’re off the beaten path 30 Yamaha/Star’s New Stratoliner— 1st Impression: Astellar baggage handler 32 Mental Motorcycling— Highway Hypnosis 33 Medical Motorcycling— About Gout 34 Legends Of Motorcycling— Bill Werner, The Game Changer 36 Harl ey-Davidson’s Cross Bones— Aspringer fork and sprung seat make for a nostalgic Softail 37 Motorcycle Design— The YikeBike & Honda’s U3-X 38 Proficient Motorcycling— Corner Braking 48 Innovation Of The Month— PivotPeg



Filed Under (Aprilia) by admin on 06-11-2010

Our sporty and lightweight SLIP-ON systems offer a great balance between price and performance and represent the first step in the exhaust system tuning process. The change will be also visual as our HEXAGONAL mufflers perfectly fit the exterior line of the sporty Dorsoduro and add a clean racing image. The muffler outer sleeve is made of titanium, which gives a special hi-tech touch to our SLIP-ON system. We offer street legal version with removable muffler in- serts. PERFORMANCE Measurements of the Akrapovic SLIP-ON system on the APRILIA DORSODURO 750 (without muffler insert): Power & Torque: the exhaust system modification results in a major boost in performance, delivering a solid 84.8 HP at 9540 rpm on back wheel. But the increased power isn’t available just at the top of the range; the system shows its quality already from 3500 rpm up through entire rpm range. Max. increased power between the Akrapovic and the stock system is 1.8 HP at 9300 rpm. Besides this, the torque is substantially higher in a lower rpm area from 2500 rpm to 6500, and also in middle and high rpm area. Technical specifications of Akrapovic exhaust systems and related products subject to change without notice. 20 30 40 50 60 70 80 47,5 50,0 52,5 55,0 57,5 60,0 62,5 65,0 67,5 3000 4000 5000 6000 7000 8000 9000 10000 WhlPwr EngT rq EngSpd RPM STOCK EXHAUST AKRAPOVIC SLIP-ON EXHAUST PERFORMANCE stock AKRAPOVIC max. increased power max. rear wheel power HP / rpm (measured on Dynojet ATV) 83.13 / 9560 84.8 / 9540 1.8 / 9300 ADDITIONAL DATA weight comparison (kg) stock AKRAPOVIC difference 11.13 SS link pipe TITANIUM link pipe stock – S.S. stock – TITANIUM 4.35 – 6.78 – noise measurements (dB / rpm) stock AKRAPOVIC 96 / 4375 96 / 4375