helix 150cc blew drive belt!
 

im new to this forum,,thx in advance for any help,,,,ok ,so the drive belt on my helix 150 broke,,how do you change it?i have the cover off but cant seem to get the pully off..tried a screwdriver but broke a lil piece off a fin,,is this bad??,also should i use kevlar belt or replacement?and is there anything else i should do or know when changing this?