Darth Maul's modified Razalon FC-20 "Bloodfin" Speeder!
Stored in Lord Maul's Scimitar front cargo area and deployed via the bow access hatch. Seen briefly in The Phantom Menace when Darth Maul attempts to intercept Padme and Qui Gonn et all as they're leaving Tatooine - with a quick try at squishing young Anakin Skywalker by riding over him - because why not? :)
In screenshots from the film, the Bloodfin appears to be very dark grey in colour or dark brown, or possibly a very dusty black. Toy manufacturers and graphic designers have portrayed it as being all different colours from beige and brown to grey and many 2-tone variants... so, I included a few colour ideas for you in the photos, although in the instructions I've stuck to Dark-Bluish Grey with Reddish Brown seats. I'll be happy to see other people's ideas! Free instructions on Rebrickable!