Derbi boulevard 125 4t Workshop Manual page 123

Engine
- Before opening the crankcase, it is advisable to
check the axial clearance of the crankshaft. To do
this, use a plate and a support with specific tool
dial gauge.
Specific tooling
020262Y Crankcase splitting strip
020335Y Magnetic support for dial gauge
Characteristic
Standard clearance
0.15 ÷ 0.40 mm
Splitting the crankcase halves
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
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.
ENG - 123