TOP perfomances 9912800 Manual De Instrucciones página 7

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PISTON CYLINDER ASSY
For Minarelli/Yamaha 50cc.
Dear Customer,
Thank you for choosing one of the many items that
"TOP PERFORMANCES" has designed and manufactured to
optimise your vehicle operation.
Congratulations on your choice and we hope you enjoy.
BORE
DISPLACEMENT = 67.9 cc.
The cylinder is made in "MlNACROM" cast iron (with chrome added
to the alloy), unique in its class with 8 scavenge ports, 6 are opposed
and 2 are placed on the rear to optimise the fi lling.
RACING "2 PLUS" Ø 47
H O horizontal engines
2
Part no. 9912800
SPECIFICATIONS
= 47 mm STROKE
Compr. Ratio = 1:14
7
= 39.2 mm