I would count on an additional 7-8 HP with the trail/recreational port,crank,JE11:1 and cam. Probably more, but I like mentioning lower numbers to be on the safe side. The +5 was mass produce for longevity instead of solely performance which should mean something to trail/mx/xc riders. I like the recreational/trail port & HC2 because overall its easy on the valve train which also transfers to extra reliability.
Reliability is what we are about and dedicated to. We do not mind trying new things, but we aren't afraid of losing 1-2 horsepower in order to get a dependable and solid motor if you want a high horsepower "tinker" motor we aren't the "engine builder" for you unfortunately. However, whatever path you take let us know and take pictures.
Thanks!