Too many topspeed runs?

[rcjmaxx]

My 9L/9918 14 cell powered Emaxx is bashed once a week,then a topspeed runner at least twice a week after tweeking and experimenting with gears,wheel/tire combos and such.This has been going on for about 2 months.I bash with 65/15 gears and topspeed with 65/18.Topspeed runs are usually 4 passes,up and back twice.Another RCer saw me and commented that this amount of bashing AND topspeeding sounded like alot of wear and tear on the motor.Weather I'm bashing or topspeeding the speedcontroller stays cool the motor gets warm to barely hot,but never too hot to touch.Is this an issue or no big deal?