Sym Jet 100 - Cylinder and Piston Service

5. CYLINDER HEAD/CYLINDER/PISTON
5-6
Use a straight edge and a feeler gauge to
measure the cylinder head for warp.
Service limit: 0.10 mm
In “X” and “Y” direction, measure the cylinder for
worn out as the three levels shown in the figure.
With the max. value to decide cylinder wear out
condition.
Service limit
JET 50 : 39.050mm
JET 100 : 51.050mm
Measure the OD of piston at the 7 mm from the
bottom of the piston.
Service limit
JET 50 : 38.935 mm
JET 100 : 50.935 mm
Calculate the clearance between piston and
cylinder.
Service limit: 0.100 mm
Measure the ID of piston pin hole.
Service limit
JET 50 : 12.030mm
JET 100 : 14.030 mm
Measure the OD of piston pin.
Service limit
JET 50 : 11.970 mm
JET 100 : 13.970 mm
The ID of piston pin hole
The OD of piston pin
7mm
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