Exhaust Valve Position Check - Husqvarna WRE 125 2011 Workshop Manual

1
E
D
D
5
3
4
Ed. 05-2011
SETTINGS AND ADJUSTMENTS

Exhaust valve position check

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2
2
2
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The cylinder has a double exhaust valve system called H.T.S. (HUSQVARNA
TORQUE SYSTEM), ensuring engine top performance. These valves are con-
trolled by a centrifugal governor making them open at approx. 7500 rpm ± 200.
This governor, positioned on engine right side, operates the valve through a
leverage system consisting of a layshaft (A) operated by centrifugal governor
gear (B); of a lever (C) pivoting on such shaft; of a connection lever (D) and
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another control lever (E) pivoting on the valve control shaft. With the valves fully
closed, the min. distance from the piston must be equal to or over 0.4÷0.5 mm
(0.0157÷0.0197 in.).
E
To perform this adjustment proceed as follows:
- Remove the cover (1) by loosening the screws (2) using an 8 mm wrench.
- Loosen the screws (3) and (4) locking plate (5) in place using a 13 mm
wrench.
- Using a 13 mm wrench clear up plate rotation (5) and, keeping the plate (5)
in its position, at the same time with a finger place the lever (D) so that the
ends of the spring (6) are resting on tooth (7) as shown in the figure, then
lock the screws (4) and (5) in their positions.
C
- Tighten the screws (1) and (2) to the specified torque.
D
C
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5
3
4
D.27
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