Collection: Gearboxes / Gear Reducers

Compare B18, B24P, B24 and B31 gearboxes
  • B18 · 1″ shaft, 11–18 HP. Common on Honda GX390 builds.
  • B24P · 1″ shaft, up to 24 HP. Used with 1″-shaft V-twins such as the GX630.
  • B24 · 1⅛″ shaft, up to 24 HP. Common on GX690 builds.
  • B31 · 1⅛″ shaft, up to 31 HP. Used with engines such as the iGX800.
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