6'0" 340 here, M50 is fine. I've got at 30" inseam, so the stock peg position is fine for me. You may want to look into adding some Johnskit forward controls when you get your M to move the footpegs forward about 3-4".
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Current Mods/Accessories: TourMaster Cruiser II XL Box saddlebags, OEM saddlebag brackets, OEM short sissy bar, MC Enterprises engine guard, Mustang Vintage Wide Touring seat, Kuryakyn Dually Iso highway pegs + Longhorn mounts, Highway Hawk floorboards, Memphis Shades Big Shot windshield
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