most of the guys here don't ride dunes . I know this because I do and no body wants to go with me to ride some of the best dunes in the USA . just abunch of bench warmers .
the stock z is under powered . throw some money at it +4 crank , rhc 187 cams ,+1 valves, FCR ,pipe ,dynateck , big bore
The White Beast
03 ltz400,95.5bore,+5crank,P&P,13.7:1,JE piston,spacer plate,RHC +1 intakes valves,RHC #208in&187ex cams,DRZ manual decomp,DID cam chain,no air box,Sredrum TB 42mm FCR,RAT stack,WB fuel screw,EMN needle,quick shot,06 clutch 450r drive plates w/trx400 ex springs,C2HB,ex thumber,trx450r air boot, Barker Performance pipe, trailteck flywheel,dynatek,NOLOGY HOTWIRES ,nerf bars,450r shocks, +4 swinger,lowered front & rear