Inspecting The Valve Sealings - APRILIA RS4 125 Service Station Manual

RS4 125
•
Remove the bucket tappet of the valve
in question and read the calibration val-
ue for that bowl, found inside the buck-
et tappet itself.
•
Replace the bucket tappet with new
one of a size suitable to restore the
correct clearance.
Characteristic
Valve clearance at intake
0.15 mm (0.0059 in)
Exhaust valve clearance
0,25 mm (0.0098 in)
•
Fit the camshaft, the gears and the chain in their correct positions, using the references
located on the flywheel side of the crankcase.
•
Fit the cam tower and tighten the eight screws to the prescribed torque.
•
Fit the chain tensioner.
•
Check for correct valve clearance.
•
Fit the head cover.

Inspecting the valve sealings

- Fit the valves into the cylinder head.
- Alternatively test the intake and exhaust valves.
- This test should be carried out by filling the mani-
fold with petrol and checking that the head does
not excessively ooze through the valves.
Engine
ENG - 181