Spark plug gap

I recently added dyna coils and wires. the bike has kerker 4-1. pods. everything is stock minus the jetting. does anybody have any suggestions on plug gaps now? i have been told that 0.037-0.042 would be good and the plugs would last longer too.Thanks guys

I found some old post from 2011 that helped. No need to beat a dead horse! I asked too soon before using a search engine.