The 327 is a bigbore using a 76mm piston. It works really well for me. It has more low end and midrange than our other 300, but it has a little less overrev.
I cannot seem to find my old 327 post on this forum, but here is a link with more details.
https://thumpertalk.com/forums/topic...omment-7879885
I will open the carb and get the rest of the jetting details.