With the Magny Cours (otherwise incorrectly called Granturismo), Pinasco is launching a further developed version of the well-known 177's standard. The cylinder layout has remained the same in terms of the ducts Apparent features are the now finally reasonable piston with narrow rings and the cylinder head with central combustion chamber and spark plug.
The Magny Cours is now offered in a version for 57mm stroke (177ccm) and 60mm long stroke shaft (187=190ccm). The cylinder itself is the same, the long-stroke version comes with a 1.5mm thick foot gasket spacer to compensate for the stroke (no other foot gasket).
To ensure that the control angles, which are so important for the power delivery, work, they have been modified compared to the old version. The Magny Cours has the following control angles:
| >p>stroke | overcurrent | outlet | outlet |
57mm | 114° | 168° | 27° |
60mm (foot spacer) | 127,5° | 176,5° | 24,5° |
SCK TIPP
From our point of view (for a powerful touring engine) a stroke compensation at the head would be much better for the 60mm 190ccm version. Thus the head angles would fit the cylinder concept much better:
| >p>stroke | overcurrent | outlet | outlet |
| p>60mm (head spacer) | p>120° | 170° | 25° |
Unfortunately, the compensation at the head is difficult to implement, because Pinasco centers the head on the upper sealing surface by a groove. With a spacer the centering would be lost and the necessary spacer would only have to consist of a very thin ring. This is probably the reason why Pinasco decided to use a foot spacer. ((US)
AI-translation
DE | €
