Inspecting The Springs And Half-Cones; Refitting The Valves; Inspecting The Cam Shaft - APRILIA SPORTCITY ONE 125 Service Station Manual

SPORTCITY ONE 125

Inspecting the springs and half-cones

- Check that the upper spring caps and the cotter
halves show no signs of abnormal wear.
- Check the length clearance of the springs.
Characteristic
Valve spring length
33.9 ÷ 34.4 mm

Refitting the valves

- Lubricate the valve guides with engine oil.
- Place the lower plates of the valve spring on the
head.
- Use the punch to fit the 2 sealing rings one at a
time.
Specific tooling
020306Y Punch for assembling valve seal
rings
- Fit the valves, the springs and the spring retaining
caps. Using the appropriate tool with adapter 11,
compress the springs and insert the cotters in their
seats.
Specific tooling
020382Y Tool for removing valve cotters fitted
with part 012
020382Y011 adapter for valve removal tool

Inspecting the cam shaft

- Inspect the cam shaft for signs of abnormal wear
on the cams.
Characteristic
Standard diameter Bearing A
Ø: 32.5 mm -0.025 -0.050 mm
Standard diameter Bearing B
20 -0.020 -0.041 mm
Engine
ENG - 97