TOHATSU MX 50D2 Service Manual page 244

Power Unit
10mm
D1
(0.394in)
D2
D3
5-66
35mm
(1.378in)
10mm
(0.394in)
6. Inspection of Piston Pins
Measure piston pin outer diameter, and replace piston pin
if the outer diameter is over the limit.
Piston Pin Outer Diameter : Standard Value
17.55 mm (0.6909 in)
Functional Limit :
22.97 mm (0.9045 in)
Measuring Locations :
D and D
1 3
D
2
7. Inspection of Piston Pin Clearance
Calculate piston pin clearance, and replace piston and
piston pin together if the clearance is over the limit.
Calculation of Piston Pin Clearance :
Piston Pin Hole Inner Diameter - Piston Pin
Outer Diameter
Standard Value :
0.003 - 0.007 mm (0.0001181 - 0.0002756 in)
Functional Limit :
0.020mm (0.000787 in)
Use the maximum values of piston pin hole inner
diameters and piston pin outer diameters
measured respectively.
GB
10 mm (0.394 in) from top end
and bottom end respectively
35 mm (1.378 in) from the end
2st X50D2 2011