APRILIA TUONO V4 R a-PRC ABS Service Station Manual page 352

Engine
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 IN RELATION TO BALANCING CLASS
On engines equipped with crankshafts with NON extractable sprockets, from engine number:
- from V4 TY 13676 onwards
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.
CAUTION
IT IS NOT POSSIBLE TO ORDER CERTAIN CONNECTING ROD AND CRANKSHAFTS CLASSES,
THEREFORE, IF NECESSARY, REPLACE THE CONNECTING RODS OR CRANKSHAFTS, FOL-
LOW THE TABLE BELOW.
ENG - 352
TUONO V4 R a-PRC ABS