APRILIA SPORTCITY ONE 125 Service Station Manual

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
SPORTCITY ONE 125 Engine
ENG - 97

APRILIA SPORTCITY ONE 125 Specifications

General

Engine Type	Single cylinder, 4-stroke
Displacement	124 cc
Cooling System	Air-cooled
Fuel System	Carburetor
Front Suspension	Telescopic fork
Rear Suspension	Single shock absorber
Front Brake	Disc
Rear Brake	Drum
Front Tire	120/70 - 14
Rear Tire	120/70 - 14
Transmission	Automatic
Fuel Capacity	7 liters