That motor will run great at 5 degrees. I dont think you will need anymore timing unless you are on/off the throttle like MX or Drag racing. If you are running long trails, roads, open dunes, goofing, etc. then your fine where your at. 7 degrees will make alittle more power though IF you think you need it.
Call me/pm me and let me know what your squish is. Should be around .035 -.045 range.
:beer:
Dave i can relate to a Rhino azz cause i have one. :yelrotflmao: jk