General Specifications; Engine - Yamaha QT50 Service Manual

7-1. GENERAL SPECIFICATIONS
A . General
Model:
Model (l.B.M . No.)
Frame l.D. & Starting Number
Engine 1.0. & Starting Number
Dimension:
Overall Length
Overall Width {standard)
Overall Height {standard)
Seat Height
Wheelbase
Minimum Ground Clearance
Weight:
Net Weight
Performance:
Minimum Turning Radius
B. Engine
Description:
Engine Type
Engine Model
Displacement
Bore x Stroke
Compression Ratio
Starting System
Ignition System
Lubricat ion System
Cylinder head:
Volume {w ith spark plug)
Cylinder:
Material
Bore Size
Taper Limit
Out of Round Limit
Piston:
Piston Clearance
Piston Over Size
Piston Ring:
Piston Ring Design
{Top)
Piston Ring Design {2nd)
Ring End Gap (Installed) {Top)
Ring End Gap (Installed) {2nd)
Ring Groove Side Clearance
(Top)
Ring Groove Side Clearance {2nd)
Small End Bearing:
Type
Big End Bearing:
Type
): Except for Australia and New Zealand
3L8 (4FO)
3L5-700101
3L5- 700101
1.550 mm (61 .0 in)
670 mm (26.4 in) (600 mm. 23.6 in)
965 mm (38.0 in)
705 mm (27.8 in) (695 mm. 27.4 in)
1 .050 mm (41 .3 in)
120 mm (
4 . 7 in) (110 mm. 4 .3 inl
43 kg (95 lb) (42 kg. 92 lb)
1.500 mm (59.1 in)
Air cooled 2-stroke. Gasoline. Reed valve
3L5
49 cm
3
(3.0 cu.in)
40.0 mm x 39.2 mm (1.575 in x 1.543 in)
6.0 : 1
Kick
C.D.I.
Separate lubrication (Yamaha Autolube)
7 .0 cm
3
I0.43 cu.in)
Special cast iron
40 mm (1.57 in)
0 .05 mm (0.002 in)
,
0 .01 mm (0.0004 in)
0 .035 ,..,_, 0 .04 7 mm (0.0014
~
0 .001 9 in)
40.25 mm. 40.5Q mm { 1 .5B5 in. 1.594 in)
~\
Keystone ring
Keystone ring
0 .15 - 0 .35 mm (0.006 ,..:, 0 .014.in)
0 .15 - 0.35 mm (0.006 - 0 .014 ir;i)
0 .03 - 0 .05 mm (0 .001 - 0 .002 in) ·
0 .03 - 0.05 mm (0.001 - 0 .002 in)
Needle beari ng
Needle bearing
7-1