APRILIA MSS Mana GT ABS Service Station Manual page 214

Engine
- Hold the tip with one hand and the crankshaft with
the other, pull the crankshaft upwards.
- Pull out the tip from the bushings, remove the
crankshaft.
- Once the crankshaft has been removed it is possible to remove the timing chain on the transmission
side.
Inspecting the crankcase halves
- Before checking the crankcase halves, thoroughly clean all the surfaces and oil pipes.
- Clean the jets and contacts carefully.
NOTE
THE JET IS FED THROUGH THE MAIN BUSHINGS. PROPER OPERATION OF THIS COMPONENT
IMPROVES PISTON CROWN COOLING. CLOGGING HAS EFFECTS THAT ARE DIFFICULT TO
DETECT (PISTON TEMPERATURE INCREASE). FAILURE OR LEAKAGE CAN CONSIDERABLY
CAUSE A DROP IN LUBRICATION PRESSURE FOR THE MAIN BUSHINGS AND CONNECTING
ROD.
NOTE
AS ALREADY DESCRIBED IN THE LUBRICATION CHAPTER, IT IS ESPECIALLY IMPORTANT
THAT THE BY-PASS VALVE HOUSING SHOWS NO WEAR THAT MAY IMPAIR THE PROPER
SEALING OF THE LUBRICATION PRESSURE ADJUSTMENT PISTON. THE HEAD LUBRICATION
ENG - 214
MSS Mana GT ABS