I'm very competent at porting...just don't see where material can be removed. If anyone knows, please advise. I have an old set of FMF ram valves that I'd prefer not to use. I have HJR dune port, 30mm carbs, 21cc domes, the usual. Also have 2 sets of stock cages with boyesen dual stage reeds. Just need to know or see a pic of ported cages! Thanks!