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APRILIA STX 150 User Manual

APRILIA STX 150
170 pages
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SERVICE STATION MANUAL
2Q000061
ETX - STX 150

Table of Contents

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APRILIA STX 150 Specifications

General IconGeneral
Fuel SystemCarburetor
Transmission5-Speed
Front BrakeDisc
Rear BrakeDrum
Front SuspensionTelescopic Fork
Engine Stroke4-Stroke
Cooling SystemAir Cooled
Engine TypeSingle Cylinder, 4-Stroke, SOHC

Summary

Vehicle Characteristics

Dimensions and Mass

Specifications for vehicle length, width, height, weight, and wheelbase.

Engine Specifications

Technical details of the engine, including model, type, displacement, compression, and RPM.

Maintenance Procedures

Maintenance Chart

A table outlining required maintenance tasks at different mileage intervals.

Carburettor Adjustment

Procedure for adjusting the engine idle speed and details on carburettor disassembly.

Spark Plug Maintenance

Instructions for removing, cleaning, and checking the spark plug.

Spark Plug Gap and Tightening

How to check and adjust spark plug electrode gap and its correct tightening torque.

Engine Oil Level Check

Procedure for checking the engine oil level with the engine warm.

Engine Oil Replacement

Steps for draining and refilling engine oil, including oil filter replacement.

Valve Clearance Check

How to check the clearance between valves and rocker arms.

Valve Clearance Adjustment

Steps to adjust valve clearance using the adjuster nut and screw.

Brake Fluid Level Check

How to check the brake fluid level in the front and rear reservoirs.

Brake Fluid Top-Up

Procedure for topping up the brake fluid reservoir with DOT4 fluid.

Electrical System

General Wiring Diagram

A visual representation of the motorcycle's complete electrical circuit and component connections.

Engine Removal from Vehicle

Removing the Engine

Step-by-step guide to disconnect components and detach the engine from the motorcycle frame.

Engine Components and Procedures

Gearbox Disassembly

Procedures for dismantling the gearbox, including removing forks and shafts.

Starter Motor Removal

Procedure for removing the starter motor, including disconnecting power and screws.

Rotor Removal

Steps to remove the engine rotor, using specialized tools for the fixing screw.

Stator Removal

Instructions for removing the stator and pick-up, including disconnecting cables.

Clutch Cover Removal

How to remove the clutch cover, including disconnecting the cable and removing screws.

Clutch Disassembly

Detailed steps for disassembling the clutch assembly, including plates, springs, and hub.

Cylinder Head Removal

Steps for removing the cylinder head, including valve cover and timing system components.

Overhead Camshaft Removal

How to remove the cylinder head and camshaft, including warming the bearing.

Rocker Arm Removal

Steps to remove rocker arms, covers, and lock shafts.

Valve Removal

Procedure for removing intake and exhaust valves using specialized tooling.

Chain Removal

Procedures to remove the camshaft timing gear, chain tensioner, alternator crankcase, and safety plate.

Timing Adjustment

Procedure for setting engine timing by aligning crankshaft, gears, and chain.

Cylinder Removal

Steps to remove the cylinder, gasket, timing chain, and sliders.

Piston Disassembly

Procedure for removing the piston pin and piston rings from the piston.

Cylinder Installation

Using special tools to install the piston rings and cylinder.

Crankcase Splitting

Steps to split the crankcase halves after removing various components and screws.

Crankshaft and Countershaft Removal

Procedures for removing the crankshaft and countershaft from the crankcase.

Oil Pump Removal

Steps to remove the oil pump cover plate, gears, and the oil pump itself.

Suspension System

Front Wheel Removal

Step-by-step guide to remove the front wheel, including the fixing nut and pin.

Braking System

Front Brake Bleeding

Detailed procedure for purging air from the front hydraulic brake circuit.

Clutch System

Clutch Lever Adjustment

How to adjust the clutch lever free play using the adjuster and nut.

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