Technical information

C
08.06 19
CHAPTER
PAGEISSUE
TWO-STROKE ENGINE AM6
ENGLISH
SECTION 3
C - ENGINE
Minarelli Engine
SECTION 2
F.19F. 18
F.21F. 20
1
20) DISASSEMBLING the thermal section:
a) unscrew the 4 cylinder head holding nuts and remove the relevant washers; remove the head, its O-ring,
the cylinder, the cylinder gasket and the four O-ring on the stud bolts.
CAUTION: before removing the circlips of the piston pin, put a clean cloth into the opening on the
crankcase, to prevent the circlips dropping into the engine.
21) REMOVE the two circlips (F.18), remove the piston pin and, if you intend to use a 2-diameter plug, knock
gently taking care to hold the piston on the opposite side in order to avoid damaging the connecting rod.
22) REMOVE the 13 screws joining the two crankcases (F.19) and take the clutch pin out of its seat.
23) SEPARATE the 2 crankcases by gentling tapping the secondary shaft and shift shaft with a wooden mallet.
IMPORTANT: if you need to take the crankshaft out of its seat, use the special tool (1- F.20).
24) Once the crankcases have been separated, CHECK that the shim washers are on the shafts and not on the
crankcase that has just been removed (F.21).