Mash Seventy - Idling Adjustment

Chapter 2
Periodic maintenance
Section 2 Maintenance and adjustment
2
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7
IDLING ADJUSTMENT
This engine features EFI (electronic fuel injection).
Engine idle speed
1500±100 rpm
The idle speed is not adjustable.
Do not attempt to make any adjustment to the
idle speed as it may permanently damage
Throttle clearance
The throttle clearance
A
should be 3—6mm.
As in Fig 2.2.12
When turning the throttle lever slightly, it can be
measured at the throttle lever. If the gap is not correct,
adjust it as follows:
Loosen the lock nut ②, and turn the adjuster ③
clockwise or counterclockwise until the specified clearance
is obtained.
While holding the regulator ③, tighten the lock nut
②.
As Fig 2.2.13.
Throttle steel cable clearance
A
：3—6mm
Note：
After the adjustment is completed, check whether
the rotation of the throttle lever can increase the
engine speed and whether the throttle lever can
automatically return to position.
Fig 2.2.12
Fig 2.2.13
Chain tensioner
In the first 1000 kilometers (5 months)
and every 4000 kilometers (20 months)
thereafter, inspections should be carried out.
The air distribution chain should be
maintained at a proper tension through a
manually adjustable tensioner.
To prevent noise, the tension regulator
must be adjusted according to the time
listed in the periodic maintenance table.
The adjustment steps of the drive chain
tension regulator are as follows:
Loosen the lock nut ① on the chain
tension adjuster, and turn the positioning
bolt ② one turn counterclockwise.
This allows the spring to firmly press the
push rod to the cam chain tensioner, so
that an appropriate chain tension can be
provided.
Tighten the positioning bolt ② to fix
the position of the tensioner, and tighten
the positioning nut ① to tighten the
positioning bolt ②.