URAL Motorcycles 2000 -10 series, Repair Manual, Page: 41 / 193

Table 1.5-2 Maximum tolerated limits of Wear and Clearances Between Principal mating Members of the Engine,
∗
IN MILIMETERS
∗
.
Maximum Tolerances
Name of parts
and mated pairs
of parts
Wear on
diameter
Out-of-round
and taper
Diameter clearance Measuring point and method
Crankpin to
rollers to
connecting rod
big end
0.100
Crankpin 0.050
Connecting rod
big end
0.050
Cylinder 0.150 Out-of-round
0.070
In five points (refer to “Repairing
the Crank Mechanism” of
subsection 2).
Cylinder to piston 0.200 Measure piston in plane, square to
pin axis at point 5 mm from the
piston lower edge.
Piston pin 0.015
Hole in piston to
fit pin
0.020
Piston to piston
pin
0.010
Connecting rod
small end bush
0.025
Piston pin to
connecting rod
small end bush
0.030
Compression ring
(height)
0.050
Piston groove to
piston ring
0.150 (by depth)
Piston groove to
oil control ring
0.150 (by depth)
Valve stem 0.120
Valve guiding
bush
0.150
Valve stem to
guiding bush
0.250
Rockshaft 0.070
Rocking arm
(aperture)
0.070
Rockshaft to
rocking arm
0.120
Tappet 0.050
Tappet guide 0.050
Tappet to tappet
guide
0.100