# External research pass — verified findings only (Aug 2026)

A web-research agent was dispatched with a brief covering this project's
open questions. Its raw report contained real value mixed with fabricated
detail (invented a table-category split not present in a cited source,
guessed at least one dead URL). Everything below has been **independently
re-verified by this project directly against the actual source** — the
raw report and the dispatch brief that produced it have been deleted; this
is the distilled, trustworthy result, not a summary of the report.

## Confirmed

**`0x53822` device flag — Purge Control Valve, strengthened.** TuneECU's
own `tests.html` (this project's site mirror) lists a distinct, real
testable entry: *"Purge Control Valve (Only bikes with charcoal
canister) — Activate the purge valve, listen for a very quiet noise,"*
right alongside its own separate SAI entry. Confirms Purge Valve is a real
device on this ECU family with its own dedicated path — genuinely
strengthens (doesn't prove) the leading hypothesis for this byte. Also
confirms "Air Flap (675 Daytona)" is Daytona-675-specific, per the same
list. Full detail and remaining uncertainty: `reference-maps/DEVICES.md`.

**Wideband sensor bung masking is real and worth designing around.**
Confirmed via a real installer source (RB Racing): long/angled 18mm bungs
and thread-reducing adapters (18mm→12mm) can prevent the sensor tip from
reaching the core exhaust gas stream, causing delayed/inaccurate
readings — *"Many manufacturers use long 18mm O2 slanted bungs. These
'mask' the 18mm O2 sensor signal"*; thread reducers are *"junk... too long
masking the signal."* Practical implication: check bung depth/angle
against the sensor's spec before assuming any available bung (stock or
new) works. Folded into `TUNING_IMPL_PLAN.md` Phase 2.

**Zeitronix ZT-3 — a third real wideband option.** Sold by Woolich Racing
as a tuning-package wideband kit. Adds to the existing list (Innovate
LM-2/MTX-L, AEM X-Series UEGO). Folded into `TUNING_IMPL_PLAN.md` Phase 2.

## Explicitly not carried forward (checked and rejected, or unverifiable)

- A claimed "Speed-Density vs. Alpha-N" table split in a Keihin SH7054
  XDF listing — checked the actual source, no such split exists there;
  the page instead lists a 3-cylinder table set, meaning the wrong
  product (likely a Triumph triple's XDF, not this twin) was cited.
  Don't reuse this claim.
- A specific Woolich Racing product URL for wideband bung fitment — the
  exact URL doesn't resolve to a real distinct page; the general product
  line exists but this project couldn't confirm it covers the correct
  (Keihin, air-cooled) ECU generation rather than the later Bosch/
  liquid-cooled T100. Same wrong-generation risk this project has hit
  repeatedly elsewhere — don't cite this source without re-confirming
  ECU generation first.
- A Reddit thread claimed to discuss map `20262` availability — could not
  be fetched or verified at all (Reddit blocks this project's tooling).
- Claims about TTP's "TuneLoader" licensing mechanism and Ultimate Twin
  Performance's remap-service pricing — plausible, not independently
  checked.
- A Manitoba emissions-inspection regulation citation — checked, the
  specific regulation number cited does not match what's actually
  findable; not relied on for anything, not detailed further here.