PIAGGIO 633929(IT) Service Station Manual page 143

MP3 125
Engine
- Remove the two retainers indicated in the figure and the starter motor.
Before opening the engine crankcase, it is advis-
able to check axial clearance of the crankshaft. To
do this, use a plate and a support with appropriate
tool dial gauge.
Higher clearances are signs of wear on the sup-
porting surfaces of the crankshaft casing.
Standard clearance: 0.15 ÷ 0.40 mm
Remove the 11 coupling screws to the crankcase.
- Separate the crankcase while keeping the crank-
shaft in one of the two halves of the crankcase.
Remove the crankshaft.
CAUTION
KEEP THE CRANKSHAFT IN ONE OF THE TWO
HALVES OF THE CRANKCASE WHEN SEPA-
RATING IT. IF YOU FAIL TO DO THIS, THE
CRANKSHAFT MIGHT ACCIDENTALLY FALL.
- Remove the coupling gasket of the crankcase
halves.
- Remove the two screws and the internal cover
shown in the diagram.
CAUTION
WHILE OPENING THE CRANKCASES AND RE-
MOVING THE DRIVING SHAFT, CHECK THAT
THE THREADED SHAFT ENDS DO NOT INTER-
FERE WITH THE MAIN BUSHINGS. FAILURE
TO OBSERVE THIS PRECAUTION CAN DAM-
AGE THE MAIN BUSHINGS.
- Remove the oil guard on the flywheel side.
- Remove the oil filter fitting shown in the diagram
ENG - 49