whats the best variator belt for an evo 2 cylinder with 9 roller variator

[david14a05]

:?whats the best variator belt for an evo 2 cylinder with 9 roller variator. ?

 

[Fabrizi Dude]

What type of bike is it ?

 

[david14a05]

yamaha aerox 70cc 2007

 

[Fabrizi Dude]

Polini belt # 248.040.1

 

[david14a05]

thank you! does anyone think its best to change the crank bearings when i change my crank at the week end. the bearings have done 4000 mile