Umatek Powerbloc 80 Driven Pulley | Yamaha SR Viper MTX (2015-2017) USA Use either your stock axle

Use either your stock axle or our 2-wheel axle kit

modular and full face helmets

This suit has an engineered fit to deliver the highest level of active race protection and is Tech-Air® ready

Straight fit sizes: UK 8 – 22 Short/Reg/Long

Fitments include options for 1

Umatek Powerbloc 80 Driven Pulley | Yamaha SR Viper MTX (2015-2017) USA Use either your stock axleUmatek Powerbloc 80 Driven Pulley Yamaha SR Viper MTX (2015 2017) The Powerbloc 80 is the latest driver pulley designed by CVTech. This pulley as been developed to offer an alternative to snowmobilers who want maximum performance and are tired of wasting time and money on maintenance of their original pulley.