The lowest official engine displacement for Honda’s Grom line is 125cc. There are no production Grom models with a smaller engine, so the 125cc MSX125/Grom remains the entry point in most markets.
Engine overview: the 125cc Grom
To understand what "125cc" means for the Grom, consider its core motor: a small, air‑cooled, single‑cylinder four‑stroke that powers a lightweight, highly maneuverable motorcycle aimed at new riders and urban commuting.
Key technical features you should know about the 125cc Grom include:
- 125cc, single‑cylinder, four‑stroke engine
- Air‑cooled design with simple, compact packaging
- Fuel injection for efficient startup and throttle response
- Four‑speed manual transmission
- Lightweight chassis and small overall footprint for easy handling
Note that specs can vary slightly by year and market, but the engine displacement remains 125cc across all current Grom/MSX125 variants.
Market variants and what “lowest CC” means across regions
Honda markets the same 125cc heart under different names or trims depending on region. Here is a snapshot of common naming conventions and what you typically get with each:
- North America: Honda Grom (125cc, marketed as the Grom); the International name MSX125 is used in other markets with the same engine
- Europe and other regions: often sold as MSX125 or MSX125 SF (Sport), still 125cc
- Asia: typically MSX125 or Grom branding depending on country, with identical 125cc powerplant
In every case, the displacement remains 125cc, and there is no production version of the Grom with less than 125cc.
Bottom line: why 125cc is the baseline for the Grom
The Grom's appeal rests on being a compact, approachable motorcycle with a 125cc engine that delivers modest power suitable for city riding and beginners. Honda has kept the displacement at 125cc in order to meet learner and license requirements in many markets while preserving a nimble, affordable riding experience.
Summary
The lowest CC for a Honda Grom is 125cc. Across markets, the Grom/MSX125 nameplate refers to the same compact, four-stroke, air‑cooled 125cc engine in a light, easy‑to‑handle motorcycle. If you are exploring options for a smaller or different displacement, you would be looking at other Honda small bikes rather than a Grom itself.