APRILIA RSV4 RR Service Station Manual page 373

RSV4 RR/RF
WITH CLASS SELECTION
CAUTION
THE MEASUREMENT OF THE PISTON DIAMETER IS PER-
FORMED AT 6 mm (0.24 in) FROM ITS BASE
Characteristic
Piston diameter
Class A: 77.961-77.971 mm (3.0693-3.0697 in).
Class B: 77.971-77.981 mm (3.0697-3.0701 in)
Maximum clearance between the cylinder and
piston
0.1 mm (0.0039 in)
Maximum wear limit of the clearance between
pin and pin hole on the piston
0.040 mm (0.0016 in)
Maximum allowed clearance between the first
piston ring and respective slot on the piston
0.1 mm (0.0039 in)
Maximum allowed clearance between the sec-
ond piston ring and respective slot on the pis-
ton
0.1 mm (0.0039 in)
Maximum opening of the piston ring fit on the
pin First piston ring
0.5 mm (0.0197 in)
Second piston ring
0.7 mm (0.0275 in)
Selecting connecting rods
SELECTING CRANKSHAFTS AND CONNECTING RODS ACCORDING TO BALANCING CLASS
crankshafts and connecting rods have been intro-
duced which are matched with each other in rela-
tion to their balancing class. The class is easily
identifiable as it is marked on the component itself.
Engine
ENG - 373