Polini Evolution variator/ transmission cover for Yamaha Aerox/ Jog R/RR & Neos 50cc 2-stroke Minarelli Horiztonal engines.

Polini Motori introduces the Evolution variator case, combining advanced technical solutions with a stylish black finish. Designed for performance and reliability, this case improves variator efficiency and reduces vibrations in tuned and standard engines.

Key Features:

• Primary gear with variator-driven pulley: Includes a supplementary gear mounted on a reinforced pin to reduce flex and increase durability.

• Improved air intake and ventilation: Integrated air conveyor with sponge filter ensures better cooling for the variator while keeping out impurities.

• Performance benefits: Eliminates variator vibrations, optimises belt travel, and can increase top speed on tuned engines.

Please note: The kit contains two extension nuts with different threads. Hand-thread each nut to determine the correct fit, then secure it using a torque wrench.
Torque specification: 50 N·m / 50 Kgf·m / 37 lbf·ft

Polini 170.0305