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2025 figures from motorcycle.com's only 2025 SE 300 page, the 300 X Trem trim ($11,999); the X Trem shares the SE 300 engine and chassis dimensions. Dirt Bike: 2025 SE 300 Factory $11,999 + $585; Cycle News 2025 review confirms $11,999, 72 x 72 mm, Keihin PWK 36, 2.64 gal.