Inspecting The Timing System Components; Inspecting The Valve Sealings - PIAGGIO MSS Fly 50 4T Workshop Manual

MSS Fly 50 4T
0.05 mm
Specification
Standard diameter (mm) A
Standard diameter (mm) B
Standard diameter (mm) C

Inspecting the timing system components

- Check that the guide shoe and the tensioner shoe
are not worn out.
- Ensure that the camshaft drive pulley, the chain
assembly and the sprocket wheel are not worn.
- If sings of wear are found, replace the parts. if the
chain, pinion or pulley are worn, replace the whole
assembly.
- Remove the central screw and the tensioner
spring. Check that the one-way mechanism is not
worn.
- Check the condition of the tensioner spring.
- If examples of wear are found, replace the whole
assembly.

Inspecting the valve sealings

- Measure the width of the sealing surface on the
valve seats.
Characteristic
Sealing surface width: Intake
1.5 mm
Sealing surface width: Drainage
HEAD CHECK
Desc./Quantity
Ø 32.015 ÷ 32.025 mm
Ø 16.0 ÷ 16.018
Ø 11.0 ÷ 11.018
Engine
ENG - 95