Moto3 bikes are limited to a maximum engine capacity of 250 cc (single‑cylinder, 4‑stroke).

Quick Scoop on Moto3 cc

  • Class name: Moto3 (entry class in Grand Prix motorcycle racing).
  • Engine type: 4‑stroke, single‑cylinder only.
  • Capacity limit: up to 250 cc (this is what people mean when they ask “what cc is MotoGP 3 / Moto3”).
  • Other key limits: max bore 81 mm, rev limit 14,000 rpm set by control electronics.

So if you’re wondering “what cc is MotoGP 3 / Moto3?”, the short answer is: 250 cc single‑cylinder 4‑stroke race bikes.

TL;DR: Moto3 class race bikes (often casually called “MotoGP 3” by fans) are 250 cc, single‑cylinder, 4‑stroke machines by regulation.

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