I just got back and here is the lowdown. The timing was set like a pick-up for hauling a load. It was set at 8 degrees. He reset it up to a max of 22 degrees at my request. He said it could have gone higher, but at 26 degrees and max RPM, it started to ping just a little bit, so I decided to go more conservative. It was also running very lean at low and midrange RPM so he adjusted that.
Here are my observations on a short 80 mile ride afterword. It has more throttle response from a stop and rolling in the 40-60 mph area. I did this adjustment because it kept dropping gears going up little inclines and hills. I checked all these readings at 70 mph and on cruise control so I could get a steady reading. Before, on a 2-3 degree incline, it would drop out of overdrive to keep up at 70 mph. Now it doesn't do that. It just stays in overdrive. Before on a 5-6 degree climb, it would not only drop out of overdrive, it would also drop a gear and the rpm would go up to 3700-3900 rpm's to hold 70 mph. Now it will drop out of overdrive, but won't drop and gear and the rpm will be at 2950.
I will know more about gas mileage next week when I go on our usual Saturday 15-200 mile breakfast ride. He said it should remain the same or get a little better.
So far, I'm happy.
For those of you that can read this thing, here is the chart. He couldn't get a torque reading because his machine couldn't get a good rpm reading. As you can see, there is about a 30% increase in HP in the midrange. The old tune was very up and down in this area because of the way the timing was set and the lean fuel mixture. It is much smoother now. This is at the rear wheels. Add about 20% to get the HP at the crank.