California Shop Swaps a CBR300 Engine Into a Honda Grom, Jumping From 7 HP to 21 HP

This is an AI-generated digest of global and domestic motorcycle news. For full details, please read the original article.

California-based Steady Garage has documented a project swapping a Honda CBR300-series engine into an MSX125 Grom, released as a YouTube build series. The engine bolts onto the Grom's existing frame mounting points without major fabrication, and a prior CBR250R version of the swap put out roughly 21 horsepower, up from the Grom's stock 7. The build pairs the engine with a Yoshimura RS-5 exhaust.