I try not to go below 2600 RPM in sixth.
This is on a flat road as well.If I want go faster quickly,in to 5th it goes.

 

2nd 20
3rd 30
4th 40
5th 50
6th 60

 

You're doing it right and not hurting anything. Don't let the motor lug.

 

Im still breaking mine in (700) miles, I shift around 3 grand and can cruise all day at 60 in 6th without lugging it. I live on flat ground so I dont think it hurts it. I cant wait to get back so I can see what 4500-5000 feels like, have not gone over 4000 with it so far and the time I pushed it some, it wanted to scat. I am amazed at the power of the 103 compared to my 06 1200, I always thought that it was fast and would leave a geezer glide but now that I own one, my glide aint no slouch and its bone stock so far.

 

I never watch the tach, it's all done by sound & feel.

 

My 2007 Road King absolutely LOVES 4th gear! I can get huge range. Third is nice too! Around Maine if you are not on the highway, most routes are 45 - 55 MPH. If I am rolling on throttle a little harder than usual, I do sometimes, I shift from 3rd to fourth around 40-ish. Then 4th purrs like a kitten up to 60-ish nicely. No tach, I go by what she is singing to me. 2007 RK 96/6

 

13 year old thread about when to shift. Never understood why shifting was such a mystery...

 

25,35,45,55,65

 

Well, now you do right LOL! You pulled it up and read it right lol... Just joking around pal!

 

Most harley riders shift points are based on how loud of exhaust they have.