Complex sentence: Underbone motorcycles often come with storage, and this may vary between markets, eg in Southeast Asia there is commonly a steel basket provided as there is none under the seat, as this is the placement of the fuel tank.
Split into simpler sentences: Underbone motorcycles often come with storage, and this may vary between markets. In Southeast Asia there is commonly a steel basket provided as there is none under the seat, as this is the placement of the fuel tank.