Loki Outriders
Loki is the god of treachery and smartness, pretty much the Hermes os norse mithology, nice for outcasts used to outflanking manuevers. Better if some type of "tricky demeanor" is added to the unit (fluffwyse).
In case you dont want to use Loki as it is, we can use small changes in the name: Locke, Loek, Laek, Lokay, Luck
Knorr Riders (Knorr is the name of merchant ships of the vikings, as those guys are meant to go scouting with scavating partys...)
Knorr Guard
Skjótfaeri Riders (Skjótfaeri means Swiftness or Speed in old norse)
Skjótfaeri Guard
Fljort Riders/Guard
Skijort Riders/Guard
Svinnr Riders/Guard
Hradr Riders/Guard
(Fljort, Skijort, Svinnr and Hradr are all words for "swift" in old norse)
Ari and Orn are boot words for Eagle, fugl is used for bird, and Bjorn is used for bear. All of them can be used to name the bike, making the units Ari-raiders, Orn-Raiders, Fugl Raiders or Bjorn Riders. Similarly, there is Hestr, Hross and Marr, who means Horse... (Heastr-Rider, Hross-Rider, and Marr-Rider)
Stál and Brattr are words for Steel, and Járn for iron. Adding the ideia of Animals presented before, we can have:
Stálari Riders (riders of steel eagle)
Stálorn Riders (same)
Brattrari Riders (same)
Brattrorn Riders (same)
Stáfugl Riders (riders of steel bird

)
Brattrfugl Riders (same)
Stálbjorn (or Bjornstal) Riders (Riders of the Steel Bear)
Brattrbjorn Riders (same)
Járnari Rider (iron eagle)
Járnorn Riders (same)
Fugljárn Riders (Riders of the Iron bird

)
Járnbjorn (or Bjárn) Riders (Iron Bear)
StálHestr, StálHross and Stálmarr Riders (all for Rider of the Steel Horse)
Hestrbrattr, Hrossbrattr and Brattmarr Raiders (same here)
Or we can fuse thos Steel and Iron words with the swfit ones, making "Swiftsteel" and Swiftiron" Riders/Guard/Warriors
Fljortjárn Riders/Guard
Skijortjárn Riders/Guard
Svinnrjárn Riders/Guard
Hradrjárn Riders/Guard
(For Swift Iron)
Fljortstál Riders/Guard
Skijortstál Riders/Guard
Svinnrstál Riders/Guard
Hradrstál Riders/Guard
(For Swift Steel)
Fljortbrattr Riders/Guard
Skijortbrattr Riders/Guard
Svinnrbrattr Riders/Guard
Hradbrattr Riders/Guard
(for Swift Steel again)
To finish it, lets ad the words Bjarg and Sker to some sentences, as those mean rock in old norse, also Bjarg meas stone too, as do steinn. (here combined only with the “swift” words
Fljortbjarg Riders/Guard
Skijortbjarg Riders/Guard
Svinnrbjarg Riders/Guard
Hradbjarg Riders/Guard
Fljortsker Riders/Guard
Skijortsker Riders/Guard
Svinnrsker Riders/Guard
Hradsker Riders/Guard
Fljortsteein Riders/Guard
Skijortsteein Riders/Guard
Svinnrsteein Riders/Guard
Hradrsteein Riders/Guard
Finally let me point my favorite on this “metal and stone” list, maybe changed a bit or more…
Skijotjárn Riders/Guard (Fast Iron Riders/Guards, I liked it because it “sound fast”, at the same time that sound “dwarvish”
Skijortstál Riders/Guard (Fast Steel Riders/Guard, Skijort “sound fast”, the “stál” word just add the end, and resemble us of steel and norse language at the same time)
Skijortbjarg Riders/Guard (Its strange how Skijort sounds good)
Hradsker Rider/Guard (Fast Rock, Harsh and dwarvish)
Hradsteein Rider/Guard (Fast Stone, again, very harsh, dwarvish, with that “bit of norse”
I got those words from an "Old Norse Dictionary", I found online. (
http://www.yorku.ca/inpar/language/English-Old_Norse.pdf)
The word are combined without any grammar rule, except "what sounds better", other combinations can be done, but here I tried to combine Animals who are symbolic fast, or the fastness itself, with steel, iron, rock and stone (all very "dwarvish" words).
Hope you like it...