Gilera runner vx125

hi every one iam currently doing my stater plate as mine crumbled,i have a vx125 2001 gilera runner,which has mods on,malossi 210 cylinder kit ,(not the v4 head or cam or crank)malossi 34mm carb and air filter,polini 3g maxi clutch and bell ,polini max speed controler(variator)with pm 8g AND 10g rollers,polini gear up kit,polini belt,which i still think this bike lacks in power ,i cant get this to wheelie even though ive  gone right down in weight with the rollers, is it just a bad set up ,if so wot set up do i need to have more pull away,its been dyno tuned to 16 bhp max speed is 97 mph,can anybody help with this,if i was to put the v4 head and cam along with the malossi cdi  and crank,will this be a waiste of money or will it help,or shall i just go for the kubler kit 278,instead of this?and with the kubler kit do i still need the power cam and cdi and v4 head......................................................