Subframe bolts and controller mount hardware almost never come up in upgrade conversations, but they're two of the most failure-prone bolts on a Sur-Ron or Talaria under hard riding.
Why These Bolts Take More Abuse Than You'd Think
The subframe absorbs constant vibration and shock loading every time you land a jump or hit rough terrain, and the controller mount protects one of the most expensive electronics on the bike. Stock steel hardware in both spots is a common point of loosening or stripping over a season of real riding — and a loose controller mount is a real problem, not a cosmetic one.
What to Check
If you haven't touched these since the bike was new, it's worth a five-minute check: pull each bolt, look for rounding or corrosion, and re-torque to spec with thread locker. This alone catches most failures before they happen.
Upgrading While You're In There
Since you're already pulling these bolts to inspect them, swapping to titanium at the same time costs almost nothing in extra labor and adds meaningful corrosion resistance in a spot that's constantly exposed to mud and water thrown up from the rear wheel.
Throttle Co carries titanium subframe bolt kits and E-moto controller mount hardware sized for common platforms — see current fitment here.