Yamaha YFM90RA Model Vehicle User Manual


 
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SPEC
ENGINE SPECIFICATIONS
0.10 mm
(0.0039 in)(0.0004 ~ 0.0016 in)
46.970 ~ 46.990 mm
(1.8492 ~ 1.8500 in)
(0.5119 ~ 0.5121 in)
13.040 mm
(0.5134 in)
(0.5117 ~ 0.5118 in)
12.960 mm
(0.5102 in)
LimitStandardItem
Piston
Piston to cylinder clearance 0.010 ~ 0.040 mm
Piston size “D”
Measuring point “H”
----0.5 mm (0.02 in)
5.0 mm (0.20 in)
Piston off-set
----Intake sidePiston off-set direction
Piston pin bore inside diameter 13.002 ~ 13.008 mm
Piston pin outside diameter 12.996 ~ 13.000 mm
H
D
Compressed pressure
installed)
73.87 ~ 90.06 N at 25.45 mm
7.52 ~ 9.18 kg,
16.59 ~ 20.24 lb at 1.00 in)
73.87 ~ 90.06 N at 25.45 mm
7.52 ~ 9.18 kg,
16.59 ~ 20.24 lb at 1.00 in)
----
----
IN
Tilt limit
EX
IN
EX
Direction of winding
----Counterclockwise
Counterclockwise
IN(top view)
----EX
2.0
2.0
2.0
°/1.2 mm
°/0.05 in)
2.0°/1.2 mm
°/0.05 in)
(
(