A must for ANY Yamaha sheave install or service. A Service should be done on both sheaves stock or modified every 1000 – 1500 miles depending on riding conditions. If your riding dusty conditions it needs to be serviced more around 1000 miles. If you get water or mud in the CVT system both sheaves should be serviced immediately.
The Ultramatic grease is used inside the primary sheave on the weights and sliders.