...art is exactly right...
..don't mix roller weights for the long haul..
..i ran my a50 with 4.7 gram rollers and blew the fairings off most anything i came across...
..excellent take-off, and the top speed...well...that'sa whole nuther story...ya'll have already read..
..however, in addition with the rollers i did have malossi variator, a K&N filter, modified oem exhaust and around a 1.01mm main jet..1000 torque drive spring and 1000 fly clutch springs...
..5 or 5.5 gram rollers will do you great without all the other stuff...