Marzzochi 33R

Paulkingk

H i recently acquired a set of these forks from a 2009 Carrera Banshe X, Want to put them on a cheap hack bke but the travel is a bit long. Is there a way I can reduce the travel to 100mm, if so how? Also for light dirt jumping and riding stuff like Danbury would I be better off using these Marzzochi forks or a set of Revalations I have in the shed, what ever I don't use on the jumpy type bike is going on the other halfs XC bike that doesn't get much use.