just had my entire motor gone thru and rebuilt... just bought the quad and daughter fragged the motor over the summer so I dont know how this quad did when its cold.. so just cleaned the carb and drilled out the air mixture screw plug and wanted to know what (if any) jetting / screw setting would work on this atv.... Also looking for a new / used front bumper and wanted opinions please... I have never owned a utility atv before so forgive my ignorance on this.... Thanks and MERRY CHRISTMAS. TIM