Preliminary Operations - TOP Perfomance 9931170 Manual Del Usuario

BORE
DISPLACEMENT = 49,2cc.
9931170
No. Q.ty
1) 1
2) 1
3) 1
4) 1
5) 1
6) 2
7) 1
8) 1
9) –
10) 1
11) 1

PRELIMINARY OPERATIONS

– Carefully wash the vehicle, especially the engine part installation
area.
– Remove muffl er, spark plug and air routers.
– Loosen the head nuts. Carefully remove head, cylinder and piston.
– Check connecting rods. If not in good condition, we would recommend
to replace it with a new one.
– Carefully check that inside the new cylinder (1) there is no foreign
matter. With a scraper, bevel all transfer ports on the cylinder barrel.
Wash it with suitable solvent and blow with air.
– Wash with suitable solvent and blow all parts in the kit to eliminate
any possible machining residues.
SPECIFICATIONS
= 40 mm
THE KIT CONSISTS OF:
9931210
Q.ty Description
1 Cylinder Ø 40 mm in "MINACROM" cast
iron (with chrome added to the alloy)
1 High silicon content piston Ø 40 mm
with "Molybdenum Disulphide" surface
treatment
1 Chromed top piston ring Ø 40
1 Lower piston ring Ø 40
1 Piston gudgeon pin Ø 10 x 33
2 Gudgeon pin circlips
– Head
– O-Ring Ø 51.50 x 1.78
1 Aluminium head gasket
1 Cylinder base gasket
1 Reed valve gasket
ASSEMBLY INSTRUCTIONS
STROKE
Compr. Ratio = 1:13
8
= 39,2 mm