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engine_cc computed from 81 x 56.7 mm (292.3 cc, as stated). moto.it gives 5 speeds; the maker and Dirt Bike's 2020 MX buyer's guide give 6. Starter left null: moto.it says electric and kick, the maker's page says kick with optional electric. Dirt Bike's 2020 summary says the 300Fi 4T MX got a new engine with larger displacement (new head, throttle body, twin silencer, crank, rod, piston), but moto.it and the maker still give 81 x 56.7 mm for 2020.