Piston Pin Bearing; Piston - Suzuki MT50 Service & Parts Manual

9-8. Piston Pin Bearing

9-8-1. Removing
The piston pin bearing is installed on the con­
rod small end and its fit is loose, so it can be
removed by hand.
9-8-2. Inspecting
To check the piston pin bearing for wear, fit
the bearing into the small end of a new con­
rod, insert a new piston pin into the bearing
and move the piston pin up and down.
place the piston pin bearing with a new one if
the play is over 0. 045 mm (0.0 0177 in).

9-9. Piston

9-9-1. Inspecting
A. Piston-cylinder clearance:
The standard piston-cylinder
0.070-0.080mm (0.00286-0.00315in)
The clearance is determined by subtracting
piston diameter from c ylinder diameter. The
cylinder measurement should be taken at 9
mm (0.35 in) above the exhaust por t, and the
piston measurement at 23 mm (0.90 in) above
the piston skirt 90° from the piston pin holes .
Use a cylinder gauge to measure the cylinder
bore and an outside micrometer to measure
the piston diameter .
Piston-cylinder clearance
Standard
0. 070-0.080mm
(0.00286-0. 00315in) (0.0975in)
clearance
Limit
Operation
Rebore cy­
0.25mm
linder or re­
place pistons
Fig. 9-8-1 Removing piston pin bearing
Re­
Fig. 9-8-2 Checking piston pin bearing
for wear
is
0
Fig. 9- 9-1 Point to be measured
Fig. 9-9-2 Measuring piston diameter
23mm(0.90in)
31