Need help with polini motor. v5x3t

hi. i have a v5x3t who has ben rebuildt to polini.

the gearing is tuned to polini gear.

but i cant find the right clutch who fits on this part!

http://www.sip-scootershop.com/EN/Products/15370000/Gearing+2162+295+cogs+.aspx

 

its a pk 50 xl2

kristoffer