the P7-R is a very smooth engine but, with the ceramic bearings is super, super smooth and the top end feels and sounds way better than ever.. also the engine temp runs around 10 degrees lower... I already used two gallons of sidewinder 30% and the engine pinch still like when it was new
id be careful in running it too long on the stock rod.....Jammin/Picco's like to stay tight for A LONG time....there for the rod takes a good beating the first while of its life....i would recommend having an extra rod on hand for when u feel that Rod slop and it needs replacing.