You can try different rotors, make sure the bearings have some high quality thin oil in them and not grease, move around the rotor shims to make sure the rotor is "floating" when on power. That's about all I can think of. Thankfully, gone are the days of comm truers and break-in drops.
On my blinky 17.5 revtech, ~3 ticks of timing seems to work best at my track. But, for other tracks I've used full motor timing with the most success. It all depends...I don't think the motor matters all too much on most layouts, but it sure is frustrating to get pulled on the straight.
Team Associated | Reedy | Airtronics
RC Excitement: Fitchburg, MA | RC Madness: Enfield, CT | Horsham RC