Early tries for Jordy Wakeham and Ben Martin, both converted by Tom Ratcliffe, put the visitors 14-0 ahead early on.
The home side replied with a try, also converted, to halve the deficit, but Jack Anderson then raced over the try-line to put Scarborough 19-7 ahead.
Jimmy Perrett's try, and a conversion from Ratcliffe, stretched the away side's lead to 26-7, but once again the hosts replied, this time with an unconverted try.
Anderson's second try of the game made it 31-12, but West Leeds kept themselves in contention with two unconverted tries.
Skipper Matty Jones and Billy Parker both bagged a try, each converted by Ratcliffe as Scarborough raced 45-22 clear.
Even a try in the final minute from West Leeds failed to take the gloss of an impressive win for Simon Smith's team
REPORT AND PHOTOS IN THURSDAY'S SCARBOROUGH NEWS