Preliminary Operations - MOTORPARTS TOP Perfomance 47 BLACK TROPHY Advertencias E Instrucciones Para El Montaje

BORE
DISPLACEMENT = 68 cc.
No. Q.ty Description
1) 1 Cylinder Ø 47 mm in "MINACROM" cast iron (with chrome
added to the alloy)
2) 1 High silicon content piston Ø 47 mm with "Molybdenum
Disulphide" surface treatment
3) 1 Upper piston ring Ø 47 with chrome facing
4) 1 Lower piston ring Ø 47
5) 1 Piston gudgeon pin Ø 10 x 38
6) 2 Gudgeon pin circlips
7) 1 Head
8) 1 Cylinder base gasket
9) 1 Head gasket
10) 1 Reed valve gasket

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.
– Use a clean rag to protect the crankcase opening so as to prevent
foreign matter from accidentally entering. Carefully clean the mating
surface of cylinder with crankcase.
SPECIFICATIONS
= 47 mm
THE KIT CONSISTS OF:
ASSEMBLY INSTRUCTIONS
STROKE
Compr. Ratio = 1:12.5
8
= 39.2 mm