Vento Triton R4, Руководство по техническому обслуживанию

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VENTO MOTORCYCLES
Rev no. 01/ Page 55 of 143
After reworking the bore to an oversize, be sure to
chamfer the edges of ports and smooth the
chamfered edges with emery paper. To chamfer, use
a scraper, taking care not to nick the wall surface.
NOTE
Minor surface flaws on the cylinder wall due to
seizure or similar abnormalities can be corrected by
grinding the flaws off with fine-grain emery paper. If
the flaws are deep grooves or otherwise persist, the
cylinder must be reworked with a boring machine to
the next oversize.
PISTON:
Cylinder and piston clearance:
Cylinder piston clearance is the difference between
piston diameter and cylinder bore diameter. Be sure
to take the marked diameter at right angles to the
piston pin. The value of elevation
○
A is prescribed
to be 20mm from the skirt end.
Service limit 39.885mm(1.5703In)
Measuring Instrument: Micrometer
As a result of the above measurement, if the
piston-to-cylinder clearance exceeds the following
limit, overhaul the cylinder and use an oversize
piston, replace both cylinder and piston. The
measurement for the bore diameter should be
taken in the intake-to-exhaust port direction and at
20mm from the cylinder top surface.