In MotoGP, a “flag‑to‑flag” race is a special procedure that lets riders change to a different bike (usually fitted with wet‑weather tyres) while the race is still running, instead of stopping everything under a red flag.

What “flag‑to‑flag” means

  • The race starts normally (“green flag”) and ends under the chequered flag, but in the middle the weather changes, so riders are allowed to come into the pits to switch bikes.
  • Because the race runs from one flag moment to another (start → change → finish) without a full race stoppage, fans and commentators call it a flag‑to‑flag race.

When it happens

  • Flag‑to‑flag is used when conditions change mid‑race, typically from dry to wet or vice versa.
  • Race Direction can show a white flag (sometimes with a red cross) to signal that the track is now wet enough that riders are allowed to enter the pits and swap bikes if they want.

How the rule works

  • Each team keeps a second bike ready in the garage, set up with the correct tyres (usually full‑wet) and basic settings.
  • Riders can choose when to pit, but they must ride the entire race distance on the same machine for each stint; they cannot keep swapping back and forth.
  • Pit‑lane speed limits still apply, and any mistakes (like wrong‑bike pit errors or speeding in the pits) can lead to penalties.

Why MotoGP uses it

  • Before flag‑to‑flag, changeable weather often meant red‑flagging the race, stopping the clock, and restarting or even red‑flagging entirely.
  • Now the race continues from start to finish, adding more drama and strategy, but also more risk because decisions to change bikes need to be made quickly and correctly.

Quick mini‑table: flag‑to‑flag vs normal/fully wet

Scenario| What happens
---|---
Normal dry race| All laps on the same dry‑set‑up bike; no bike changes allowed. 56
Fully wet race| The race starts as wet; riders begin on wet‑set‑up bikes and stay on them. 510
Flag‑to‑flag| Race starts dry; if a white flag is shown, riders can pit and switch to a wet‑set‑up bike while the race keeps running. 147

In short: in MotoGP, “flag‑to‑flag” = a race that starts under one set of conditions and lets riders swap bikes mid‑race when the weather changes, all without stopping the race clock.

Information gathered from public forums or data available on the internet and portrayed here.