it sounds like you haven't had the bike too long. have you changed the coolant?

with any new bike regardless of the promises and assurances given me by the seller, if i plan to keep it, i'll change the oil, coolant and brake fluid asap. i know it sounds stupid and basic but that coolant could have the same engine coolant properties as LAVA.

i've never experience boiling on any of my bikes ever (no i'm not Mr Slow either and like a thrash as much as anyone) but my mates sometime get this after cooking the clutch.