Brad ripple told me the taks-20r head has about 1 more hp than the tb v2, which he had on his bike at the time, so i would go with tak s-20 but thats what he said im sure everyone else has a diff opinion thou
the +r head stock vs the v2 head stock there is about a horsepower difference, +r having more...put the +r rockers in the v2 head and they are almost identical power...s20 and the v2 cam are basically the same