2011 Aprilia SR MAX 300 i.e. Service & Repair Manual PDF (P/N 677514 EN)

The Aprilia Service Station Manual 677514 EN covers the 2011 SR MAX 300 i.e. maxi-scooter and its M356M engine. This Piaggio & C. S.p.A. publication carries a 2012 copyright and is organized into 14 sections.

Supplied as a 289-page PDF in English.

• Engine repair: Engine removal, cylinder-head service, crankcase separation, crankshaft inspection, valve timing and clearance adjustment, and oil-pressure diagnosis.

• CVT and final drive: Variator, centrifugal clutch, drive-belt and driven-pulley service, plus rear-hub gear, bearing and oil-seal replacement.

• MIU fuel injection: Fuel-pump delivery tests, injector electrical and hydraulic checks, throttle-body service, stepper-motor diagnosis and TPS reset requirements.

• Electrical troubleshooting: Ignition, charging and starting tests, immobilizer flash codes and transponder-key programming, with wiring diagrams and ECU connector pinouts.

• Suspension and brakes: Telescopic-fork overhaul, fork oil-seal replacement, swinging-arm service, brake-caliper overhaul, disc inspection and brake-system bleeding.

• Cooling system: Electric-fan diagnosis, thermostat testing, radiator removal and cooling-circuit bleeding, with a diagram of coolant circulation.

• Service data: Scheduled maintenance tables, component-specific tightening specifications, lubricant and capacity data, electrical test values and coupling-clearance charts.

Written for Aprilia dealers and their qualified mechanics, this manual assumes prior knowledge of scooter repair and omits basic mechanical instruction.

M356M Engine Repair and Assembly Data

Piston and cylinder assembly data spans four coupling categories: M, N, O and P. Separate crankshaft/crankcase categories and color-coded main bushings help identify compatible components before parts are selected for a rebuild.

Cylinder-head service covers valve and camshaft inspection, cylinder-base gasket selection and the staged head-fastener tightening sequence. Magneto flywheel and starter freewheel removal and installation are also documented.

The lubrication section combines its circuit diagram with oil-pressure testing, oil-pump inspection and bypass-valve checks. Crankcase-separation cautions explain how threaded crankshaft ends can damage the main bushings during removal.

CVT and Rear-Hub Service

Transmission coverage goes beyond belt replacement to clutch-drum inspection, clutch-spring compression, torque-server service and driven-pulley bearing replacement. The tooling charts identify driven-pulley clutch tool 020444Y with its adapter ring and wrench.

Rear-hub procedures cover the gear shafts, bearing seats and oil seals, with inspection limits and assembly instructions.

MIU Injection and Electrical Fault Tracing

Symptom tables address no-start, unstable idle, deceleration backfire and poor full-throttle performance. Fuel-pressure and injector-flow checks are paired with sensor, wiring and stepper-motor checks to help distinguish supply or connection faults from a suspected MIU control-unit failure.

TPS reset coverage specifies diagnostic tool 020680Y, initial-installation and ECU-replacement conditions, and the restriction against resetting a used throttle body. The factory throttle-stop calibration is separate from the electronic reset.

Electrical references include the EMS circuit diagram, Battery recharge and starting diagram, Terminal layout and immobilizer flash-code charts. Connector tables list pin functions and wire colors for the injection ECU and associated components.

Fork, Swinging-Arm and Brake Repair

Fork service includes hydraulic-rod inspection and oil-seal extraction with tool 020487Y. Swinging-arm procedures address roller bearings, spacers, plastic bushings and silent-block mounts.

Brake coverage includes caliper overhaul, disc wear and runout checks, master-cylinder removal, and separate front and rear/combined bleeding sections. Follow the manual's safety precautions for brake work, pressurized fuel and loaded suspension springs.

Cooling, Maintenance and Bodywork Access

Thermostat testing and radiator/fan removal accompany the cooling circuit diagram, which identifies the water pump, thermostat and bypass routing.

The maintenance chart covers spark plug replacement, transmission belt servicing and valve-clearance adjustment. Dashboard instructions also cover SERVICE and BELT reminder resets. Chassis procedures explain access through the legshield, fairings and helmet compartment.

PDF Search, Bookmarks and Diagram Legibility

The page total includes five opening pages, 14 chapter dividers and a two-page alphabetical index. Main text and tables are searchable; labels embedded in diagrams are not.

Embedded bookmarks cover chapters and procedures, although some links land one page before the heading. Small labels in the full wiring and EMS diagrams remain partly illegible when enlarged; the separate connector tables are readable.