Got a new motor for my 05 crf 450r and wont start?

its a honda crf 450 with a 12.5:/1 piston, and new stage 2 cam. bike shop put the motor together and i bring it home to put into the bike and it will not start. i put all my weight into the kick starter and it barely kicks over. is there a possibity that the valves were set wrong or need to be set right. the bike will barely kick over and i even had my 300 lbs neighbor try kickin it and still same results. is there something i can do before i take it back to the shop so i might be able to ride tomorrow or do i just wait and ride it after it gets fixed.