how much power can it handle?

Tuned my last sport bike a bit on the lean side, 100k miles with no issues. Never ran hot. Dynoed before tune at 87hp. after tuning made 97 on the same dyno. If you looked at the plugs from before the tune they looked spot on, but I just had to mess with it. Lean is not necessarily bad, as long as it is not real lean. The 100k miles the bike endured was ALOT of full throttle, run it it to just shy of the rev limiter type of stuff. Keep in mind no nitrous/boost. And the crackle out the exhaust of it being a bit on the lean side was just way to cool. Oh yeah, the bike also had an ignition advancer on it....