BKU004 / WORKSHOP REASONING

Start with the observation. Stop before the guess.

The Workshop / Interface Explorer narrows a system question without pretending to diagnose the bicycle. It traces what you observed through candidate mechanisms and interfaces, then stops at the exact-product documentation gate before procedure.

01 / OBSERVE

Choose the closest bounded observation.

Choose only what you can state directly. A selected observation is not a diagnosis.

Play is felt around the steering/front-end assemblyA repeatable relative movement or play is felt around the steering/front-end assembly during a controlled inspection.A shift command does not produce the expected chain position consistentlyA rider shift command is observed to produce inconsistent or unexpected chain position in a derailleur drivetrain.Brake control feel or braking response changed from its prior known stateThe rider control feel or observed braking response differs from a prior known state.Wheel seating or retention differs from the expected stateThe wheel does not appear to seat or retain in the frame/fork in the expected way during a controlled inspection.Tire and rim combination needs verification before setupA tire/rim pairing is being considered or inspected and its approved interface is not yet established.A drivetrain part is being replaced or combined with another partA chain, sprocket/cassette, chainring, derailleur or crank-related component is being considered for replacement or combination with the existing drivetrain.

Showing reasoning path for: Play is felt around the steering/front-end assembly

02–05 / TRACE

Move through the reasoning chain.

The chain deliberately ends with an authoritative-document requirement, not a generated repair procedure.

01 · OBSERVATION

Play is felt around the steering/front-end assembly

A repeatable relative movement or play is felt around the steering/front-end assembly during a controlled inspection.

Front-end play can have more than one source. This observation does not diagnose a headset fault.

02 · MECHANISM

Candidate system paths

Steering rotation

A mechanism candidate narrows where to inspect. It does not identify the cause.

03 · COMPONENT + INTERFACE

Facts that must be identified

Components in the current path

Headset
Fork
Stem
Frame

Interfaces to verify

Steerer ↔ headset ↔ frame interface
Stem ↔ handlebar interface

Questions before procedure

Where is the movement actually visible or palpable?
Which headset/steerer/retention architecture is present?
Which component models and current manuals govern inspection?

04 · AUTHORITATIVE PROCEDURE

Exact product documentation controls.

Identify the exact headset/fork/stem/frame system, then use the applicable manufacturer or frame/component service documentation. BKU does not prescribe preload, tightening or replacement steps.

Evidence-backed document classesManufacturer user manualManufacturer dealer/service manualManufacturer compatibility map or technical documentQualified professional when documentation or inspection is unclear

05 · VERIFY

Verification is required, but it is product-specific.

The product-specific procedure must define its own verification and return-to-use criteria. BKU only records that verification is required.

BKU does not issue a safe-to-ride decision from this generic reasoning model.

SYSTEM BOUNDARY

What the explorer can and cannot conclude.

CAN DO

Structure the question

separate observation from diagnosis
trace candidate mechanisms
surface components and interfaces to identify
name the kind of authoritative document required

CANNOT DO

Substitute for exact product evidence

no generic adjustment recipe
no torque or wear values
no compatibility declaration
no return-to-use or safety clearance

Open interface library Browse mechanism graph

EVIDENCE POLICY

Manufacturer documentation is the procedural authority.

BKU004 records manufacturer technical-document portals in the evidence ledger. Those URLs are provenance metadata only; the source universe does not fetch or reproduce their procedures at runtime.

ICU-EXPEDITION-025 / GUIDED RESEARCH

Build a research path from the system, observation, or goal.

This navigator connects anatomy, mechanism, standards and source context. It deliberately stops before repair steps, exact specifications, individualized fit, or return-to-use approval.

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ICU / CONNECTED DISCOVERY

Continue through related ideas.

These are bounded editorial connections; paid placement does not influence them.

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