SHERCO ST 125, Руководство по ремонту

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37
ST SERIES
REASSEMBLING THE ENGINE
❱❘ Piston / Cylinder
•
Oil the parts well before reassembling.
•
Thread the needle bearing into the big end,
position the piston (arrow on the exhaust side).
•
Put the pin and the clips with the open side
down.
•
Fit the base gasket.
•
Position the segments correctly, (mark N)
upwards.
•
thread the cylinder.
•
Tighten the nuts to 22Nm.
❱❘ Squish control
•
Squish control is done by measuring the distance between the flat of the piston, at top dead center, and
the plane of the cylinder head. To do this, use a strand of tin that you will place on the piston. Depending
on the value obtained, adjust with one or more base seals.
125cc 250cc 300cc
Squish Mini 0.9 mm 1.25 mm 1.25 mm
Squish Max 1.00 mm 1.35 mm 1.35mm
❱❘
Head cylinder
•
Clean the cylinder and cylinder head gasket surfaces.
•
Fit the O-rings (glue them with grease if necessary)
•
Fit the head.
•
Put new copper washers ref 2390 (Factory only)
•
Fit the screws M6
•
Tighten crosswise to 10 Nm.
WARNING
Mount a 0.5mm GASKET first to check
the value of Squish.