Maintenance Specifications; Engine - Yamaha BR250F Service Manual

MAINTENANCE SPECIFICATIONS
I
SPEC
I
c:r-I
MAINTENANCE SPECIFICATIONS
ENGINE
Model
Cylinder:
Material
Bore size
<Taper limit>
<Out-of-Round limit>
Piston:
Piston size (D)
Measuring point
®
Piston to-Cylinder clearance
BR250T/TS
Aluminum alloy with cast iron sleeve
70.00 '" 70.02 mm (2.756 '" 2.757 in)
0.05 mm (0.0020 in)
0.01 mm (0.0004 in)
69.955 '" 69.960 mm (2.7541 '" 2.7543 in)
",,--......, 10 mm (0.4 in)
o
J
®
7~=*
I
D
0.045", 0.050 mm (0.0018 '" 0.0020 in)
Piston ring:
Sectional sketch Top ring
2nd ring
End gap (installed): Top ring
2nd ring
Side clearance Top ring
2nd ring
Coating Top ring
2nd ring
Keystone
B= 1.2 mm (0.05 in)
T= 2.8 mm (0.11 in)
Plain
B= 1.2 mm (0.05 in)
T= 2.8 mm (0.11 in)
0.2 '" 0.4 mm (0.008 , . . , 0.016 in)
0.2 '" 0.4 mm (0.008,..., 0.016 in)
0.02 '" 0.06 mm (0.0008 '" 0.0024 in)
0.02 '" 0.06 mm (0.0008 '" 0.0024 in)
Chrome plated/Parkerrizing
Chrome plated/Parkerrizing
-18-