Yamaha TZ125M1, Руководство по эксплуатации для владельца

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SETTING
7-10
When the cylinder gasket is changed, measure
the protruding (or sinking) amount of the piston
above (below) the cylinder top and then
change the cylinder gasket so that the follow-
ing approximate relation can be achieved
between the temperature and the piston pro-
truding amount. (The table shows an example
when the air pressure is 1013 hPa (760
mmHg).)
CC CAUTION:
• Piston protruding amount must be a max-
imum 0.15 mm (0.006 in). Above this value,
the piston and cylinder head may contact
each other.
• As the air pressure becomes lower at a
higher altitude, slide to the right the tem-
perature scale readings by 10°C (50°F)
each for every change in the air pressure
of 27 hPa (20 mmHg).
• Too much random piston protrusion at low
temperature may develop an abnormal
combustion (detonation), which may
adversely affect the intended performance
of the engine.
A
Air temperature
B
Piston protruding amount
EC71T000
Cylinder gasket setting parts
Part number Size (thickness)
4JT-11351-02 * t=0.8 mm (0.031 in)
4JT-11351-12 t=0.7 mm (0.028 in)
4JT-11351-22 t=0.6 mm (0.024 in)
TUN
* Factory installed
EC71L002
Measuring piston protrusion
1. Install the dial gauge
1
and dial gauge
stand
2
to the cylinder contact surface and
set the scale of the dial gauge to zero.
Dial gauge:
YU-03097/90890-01252
Stand:
YU-01256
C