Beta Enduro RR 350 2015 Workshop Manual page 108

3
Measuring pin bolt seat and pin bolt.
Checking the wear limit of the elastic band.
106
Check the size of the pin bolt seat located on the piston
and the size of the pin bolt. This last control must be
made at the end of the pin bolt itself in the area where it
is engaged with the piston.
Displacement
[cm³]
350 -390
430-480
See the relative chapter regarding crankshaft and
connecting rod controls for controls on connecting
rod foot (par. 1.2).
In order to check the state of use of the piston ring
and oil-scraper ring, the ring must be inserted in
the cylinder so that its axis is aligned with the axis
of the cylinder. Then measure the distance between
the two opposite edges.
The respective service limits are carried in the table
below.
Service
limit of
Displace-
compres-
ment [cm³]
sion ring
350 - 400
450 - 498
Size [mm]
Pin bolt
Pin bolt
seat
18,04 17,98
19,04 18,98
Service
limits of
upper and
lower oil-
scraper ring
[mm]
[mm]
0,8 1,0