Maintenance; Cylinder - Ossa TR280i Workshop Manual

5.1 CYLINDER HEAD
Check the flatness of the surface and the state of the rubber O-rings. If the O-rings are deteriorated
they should be replaced

5.2 CYLINDER

Check the state of the 'Nikasil' plating. There should be no abnormal vertical scratches.
5.3 PISTON AND RINGS
Check the wear using a 0.25mm gauge for the maximum separation space on the rings.
If the space is larger, replace the rings.
5.4 PISTON ROD
Check if there is play on the rod. Without taking out the crankshaft from the crankcase, tapping it by
hand in a perpendicular direction to the axle of the rod.
5.5 CRANKSHAFT
Check if it is centered and the possible wear on the are where the seals sit.
5.6 CLUTCH
Check the flatness of the clutch discs, and the total thickness of the pack (3+2 discs). The minimum
thickness is 9'75mm
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MAINTENANCE