Specifications
3
25
ASSEMBLING AND TESTING THE ENGINE
MOUNTING  THE  COMPLETE 
MOTOR SHAFT
The complete motor shaft is first coupled with 
the  left  casing.  To  do  so,  you  must  heat  the 
main  bearing  and  the  area  around  it.  Conti-
nue heating until the motor shaft is inserted 
into the bearing with minimal hindrance.
Before  starting  the  heating  process  it  is  re-
commended  to  grease the  oil  seal found on 
the outer side of the casing.
GEARBOX  UNIT:  TESTING  AND 
REASSEMBLING
As  seen  in  paragraph  1.7,  the  gearbox  unit 
consists of the control and the gearbox itself. 
The  control  is in  turn  split into internal and 
external controls.
Hereunder are the tests and reassembly pro-
cedures of such units to the engine.
TESTING THE TOOTHED WHE-
ELS AND SHAFTS
Perform the following inspections on all to-
othed wheels:
• verify the wear-and-tear of the sliding sur-
faces;
• verify  there  are  no  cracks  and  abnormal 
wear-and-tear on  the  sides of  the  teeth 
A;
• verify  that  the  engagement  parts  B  of 
the  toothed  wheels  are  not  chipped  or 
rounded;
• verify  that  the  areas  C  that  make  contact 
with the forks are not particularly worn.
Moreover,  verify  that  the  shafts  supporting 
the  toothed  wheels  do  not  present  any  si-
gns of seizing or wear-and-tear. 
3.2
3.3
3.3.1
Verifications to be performed on the toothed wheels
Heating the bearing.
Attention!
Be careful not to deteriorate the oil seal during 
heating.










