Checking The Rocker Arms; Valve Check - APRILIA MSS Mana GT ABS Service Station Manual

MSS Mana GT ABS

Checking the rocker arms

- Check the inside diameter of each rocking lever.
Characteristic
Standard diameter:
Ø 13 + 0.026 +0.015 mm

Valve check

- Remove any carbon deposits from the valve
seats.
- Check the width of the mark on the valve seat
«V» with Prussian blue.
Characteristic
Standard value:
1 - 1.3 mm
Limit allowed:
1.6 mm
- If the width of the mark on the valve seat is larger than the prescribed limits, true the seats with a 45°
milling cutter and then grind.
- Replace the head in case of excessive wear or damage.
Specification
Outlet:
- Measure the diameter of the valve stem at the three positions indicated in the diagram.
VALVE STANDARD LENGTH
Inlet:
Desc./Quantity
95.0 ± 0.3 mm
94.2 ± 0.3 mm
ENG - 185
Engine