-2 is way too much for the Side Effects. Let me see what I have for bioware.
Okay, here is a Kazei 5 bioware implant.
Effect: Aid STR, DEX, END, STUN 1d6, Self Only
Description: This implant is designed to pump concentrated adrenaline and noradrenalin into the character’s bloodstream, increasing his physical capabilities for a short period of time. When the effects of the Combat Pump wear off, the inrush of accumulated fatigue poisons can cause temporary unconsciousness. Extended use of a Combat Pump may have other, even more harmful, effects on the character’s system.
Due to the nature of bioware, characters may not buy the Poor Quality Limitation for the Combat Pump, or any other bioware implant. Bioware can be damaged, however, and a damaged Combat Pump may operate at reduced efficiency (i.e. it loses a Damage Class or two), may suffers a lost of chemical reserves (i.e. lose Charges), or may operate erratically (i.e. suffers from the Requires A Roll Limitation).
Game Information: Aid STR, DEX, END, STUN 1d6, all four characteristics simultaneously (+1 1/2), Invisible Power Effects (Fully Invisible; +1) (21 Active Points); 4 Charges (-1), Side Effects, Side Effect occurs automatically whenever Power is used (2d6 STUN Drain when Aid effects wear off; -1), Only Aid Self (-1), Cybersystem (-1/4). Total cost: 10 points.
1) Level Two Combat Pump: Increase to Aid STR, DEX, END, STUN 2d6. 42 Active Points; total cost 8 points.
Cyberssytem is my blanket Limitation for all bioware and cyberware. Now, in your case, a -2 Limitation would need to be Extreme (60 Active Points for -1) and whenever the power is used (x2 Limitation). A 14- Berserk is at least 25 points... 35 if it's Very Common. So, IF the Side Effect occurs every time you use your 24 Active Points bioware, we're talking a -1 Limitation (Major Side Effect for -1/2 x2 for always occurs). But, if the Side Effect builds up over time, then we're talking a far less value or I'd not call it a Side Effect and consider a blanket Limitation (like Cybersystem) that defines what happens as you use the bioware over time.