POLINI Evolution MINARELLI-YAMAHA long horizontal variator cover:
Beautiful and technological
Polini presents the new CARTER EVOLUTION, available for the Minarelli-Yamaha long horizontal water-cooled engine.
With very advanced technical solutions, its characteristics The main ones are two:
The most important refers to the primary shaft with driven pulley of the variator, for which Polini has designed an additional function to that of the crankcase, so that an additional bearing can be introduced that works on a bolt that must screwed to the tree itself. Thanks to this additional link, the bending of the bolt, which was completely loose originally, is significantly limited.
The second is the creation of some air intake and exhaust points to increase the cooling of the variator group. To eliminate impurities at the air intake point, a weight filtering foam has been introduced, located inside a conveyor specially designed for this. Thanks to these technical evolutions, the annoying vibrations of the variator group are eliminated. Minarelli, and it is possible to take advantage of the full travel of the belt on the variator. In engines prepared for competition, a significant increase in speed will also be noted.