Table Of Contents - SHERCO 250 SEF-R Workshop Manual

Owner's manual (190 pages)

Table of Contents

CONTENTS

FORWARD ................................................................................................................................................. 3

MOTOR TOOLS 250 SEF-R and 300 SEF-R ...................................................................................................... 4

TECHNICAL SPECIFICATION ........................................................................................................................ 5

THE MOTOR ..................................................................................................................... 5

THE FRAME ...................................................................................................................... 6

STANDARD ADJUSTMENT .......................................................................................................................... 7

THE FORK ........................................................................................................................ 7

SHOCK ABSORBER .............................................................................................................. 8

OPERATIONS REQUIRING DEMOUNTING OR NOT ENGINE ............................................................................. 9

REMOVING / REINSTALLING THE MOTOR ................................................................................................... 10

REMOVING THE MOTOR ...................................................................................................... 10

REINSTALLING THE MOTOR ................................................................................................... 10

MOTOR .................................................................................................................................................. 11

REMOVING THE CYLINDER HEAD ............................................................................................. 11

MOTOR TOP END CONTROLS ................................................................................................. 13

Inspection of the cylinder for wear ..................................................................................................................... 13

Piston / cylinder clearance ................................................................................................................................. 13

Piston wear ........................................................................................................................................................ 14

Ring groove / piston ring .................................................................................................................................... 14

Ring end gap ...................................................................................................................................................... 14

Inspect the connecting rod, the piston pin and the piston for wear ................................................................... 14

Check the camshafts for wear ........................................................................................................................... 15

Checking the camshafts and camshaft journals for wear .................................................................................. 15

Eccentricity of the camshaft ............................................................................................................................... 15

Inspect the cylinder head for flatness ................................................................................................................ 16

Visually inspect the timing chain for damage ..................................................................................................... 16

Inspecter visuellement les patins de distributions .............................................................................................. 16

Valve - Guide clearance .................................................................................................................................... 16

REASSEMBLING THE TOP END OF THE MOTOR .............................................................................. 17

Reassemble the piston....................................................................................................................................... 17

Valve timing ........................................................................................................................................................ 19

Checking the valve clearance ............................................................................................................................ 21

Replacing the cam chain .................................................................................................................................... 21

DISASSEMBLING THE RIGHT SIDE ............................................................................................. 22

Clutch dismanting ............................................................................................................................................... 22

Inspect the clutch ............................................................................................................................................... 22

Check the clutch spring length ........................................................................................................................... 22

Reassembly of the clutch ................................................................................................................................... 22

Disassembling and inspecting the water pump ................................................................................................. 23

Changing the water pump shaft seal requires removing the clutch housing ..................................................... 23

Removing the clutch hub and the clutch basket ................................................................................................ 24

Reassembling the clutch hub components ........................................................................................................ 24

DISASSEMBLING THE LEFT SIDE .............................................................................................. 25

Disassembling the ignition case ......................................................................................................................... 25

Replacing the stator and sensor system ............................................................................................................ 25