They move up to second in Shimmin Wilson Manx Bowl
Vikings beat Castletown 36-12 at Poulsom Park to move into second place in the Bowl standings.
The Peel men led 12-0 at half time after tries from Danny Howard and Harry Goodwin plus a Ryan Burke conversion.
In the second half, Vikings forged ahead with tries from Tobie Vermeire and Jack Goodwin before Town hit back with a Jim Emmett interception try converted by Kunal Patel.
Tries from Peter Crowe and Sam Tarpey soon restored the balance for Vikings before a late Paul Drake try gave Town some consolation.
David Mullarkey selected by Great Britain for road running championships
Harris wins opening qualifying round at US Open
Michael Dunlop wins Senior Classic TT
Johnny Stewart wins Senior Manx Grand Prix