Well, first off, you shouldnt, and second it's pointless. Third, if you set it to 6800, you will hit 7000, because of the way the R3 Rev limiter comes on. It's a soft limit not a hard one.
All my dyno sheets clearly go to 6900 despite revlimit being set to 6700.
Max power for all stock internal Rockets Iv seen comes at 6000 +/- 200 RPM depending on which exhaust is fitted. Shifting at 6500 will keep you at optimal power for the next gear, reving to 7k would just waste time making less power than you could.
Then, of course, there is the chance that will spit a shim. It's not a trivial chance, the results are catastrophic and possibly life threatening depending on the circumstances.
All that said, if you MUST be that guy.... just update to a newer base tune.