Practice question

A motorcycle that idles poorly and stumbles just off idle but runs better at higher throttle often points first to issues in the:

  1. Final drive sprocket tooth count only
  2. Rear brake shoe lining thickness only
  3. Steering head bearing pre-load only
  4. Pilot/idle circuit of the carburettor (or idle control on EFI)

Answer: D — Pilot/idle circuit of the carburettor (or idle control on EFI)

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