Typhoon XR 125 Roller size

Evening, I was just wondering if anyone could help me with the standard roller size on a 2000 plate typhoon xr 125, as i believe that they need changing, and I didn't want to order the wrong size and knacker it up aha.

These are the ones i was looking at but unsure if they are the correct ones http://www.donotlink-pedstop.co.uk/p-19_x_17__74gr_Piaggio_variator_rollers_for_X8_125_etc-5992.aspx.

Any help is appreciated

 

Thank you and 12 grams the correct weight

 

Cheers mate