TOP Perfomance 9931170 Manual Del Usuario página 7

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PISTON-CYLINDER ASSY Ø 40 "BLACK"
For Minarelli/Yamaha scooter 50cc.
vertical air cooled engines
Part no. 9931170 w/head
Part no. 9931210 w/out head
Dear Customer,
Thank you for choosing one of the various items that
TOP PERFORMANCES designed and manufactured for enhancing
your vehicle operation.
Our ongoing search aiming at enhancing the performance, reliability and
quality levels of our products contributed to the realisation of this new
type of piston with "Molybdenum Disulphide" surface treatment. This
special treatment has a mild surface hardness allowing its consumption
and surface adaptation during running-in. Piston sliding properties are
thus improved and friction is reduced. The special technique used to
deposit this treatment on piston skirt ensures a perfect evenness and
adhesion to the application surface.
The cylinder is made of "MINACROM" cast iron (with added chrome),
a high-quality material that places TOP PERFORMANCES cylinders
in a class of their own.
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