when to switch to synthetic

[CASTROL_159]

Hi i just bought a blata elite 13 and a giovanni and am also buying a minimotard from blata and was wondering if four tanks of gas with castrol super two stroke motor oil would be good enough break in time to switch to a synthetic, Also what are some nice mods you would recomend for some more hp we already put on performance exhaust and air filters and we just bought a big bore kit for the giovanni...

[smogcity]

Use a couple more tanks and you should be good to go.