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SHERCO ST 250 Repair Manual

SHERCO ST 250
51 pages
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ST SERIES

Table of Contents

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SHERCO ST 250 Specifications

General IconGeneral
Cooling SystemLiquid
Front BrakeDisc
Rear BrakeDisc
StarterKick starter
Engine TypeSingle-cylinder, 2-stroke

Summary

TECHNICAL SHEET

ENGINE

Provides technical specifications for the motorcycle engine.

CYCLE PARTS

Details the technical specifications of the motorcycle's cycle parts.

ORIGINAL SETTINGS

CARBURETOR

Specifies original carburetor settings for different models and altitudes.

FRONT FORK

Details original front fork settings including spring preload and oil levels.

REAR SHOCK

Provides original rear shock settings for Reiger and Olle models.

ENGINE REMOVAL / ASSEMBLY

ENGINE REMOVAL

Detailed steps for removing the engine from the motorcycle chassis.

REASSEMBLY OF THE ENGINE IN THE FRAME

Procedures for reassembling the engine back into the motorcycle frame.

DISASSEMBLY OF THE ENGINE

Removing the cylinder head, cylinder and piston

Steps for removing the cylinder head, cylinder, and piston assembly.

Removing the clutch cover

Procedure for removing the engine's clutch cover.

Clutch and primary gear removal

Steps for removing the clutch and primary gear components.

Separate the crankcase

Instructions for separating the engine crankcase halves.

Removal of the gearbox

Procedure for removing the gearbox assembly from the engine.

Removing the connecting rod assembly

Steps for removing the crankshaft and connecting rod assembly.

ENGINE ELEMENT CONTROL

Balancing weight, external dimension control

Measuring external dimensions and balancing weights of engine components.

Connecting rod radial clearance

Procedure for measuring connecting rod radial clearance.

Connecting rod end side clearance

Procedure for measuring connecting rod end side play.

Crankshaft runout control

Procedure for checking crankshaft runout (offset).

Checking the cylinder / piston wear condition

Methods for detecting wear and ovality in the cylinder and piston.

REASSEMBLING THE ENGINE

Crankcases assembly

Steps for assembling the engine crankcases, ensuring proper alignment.

Ignition assembly

Procedure for mounting the stator and hall sensor.

Primary transmission and clutch

Steps for reassembling the primary transmission gear and clutch.

Piston / Cylinder

Procedure for reassembling the piston and cylinder, including lubrication.

Squish control

Method for measuring and adjusting squish clearance using base seals.

Head cylinder

Procedure for cleaning and installing the cylinder head with new washers.

TIGHTENING TORQUES

ELECTRICAL PART

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