45 to 60 mph on a 650 with no windshield is a pleasant Cruising speed. The bike seems to be optimized for that range.
At 63 to 68mph the engine has a resonate vibration - not that anything bad is happening, its just buzzing a bit.
Wind force is exponential with speed, the wind blast is double at 75mph from what it is at 50.
I would not consider 45mph to be slow - if you have ever gone 45mph on a bicycle, its scary as hell. But on a 600 lb motorcycle its a great ride.
I normally ride on secondary two lane roads, which takes me through all the little towns and villages. I love to putt thru towns at 30mph in 5th gear, with the engine just nicely putt putt putting over and the stock exhaust as quiet as can be. Then on the other side of town, when the speed limit changes to 55mph, just crank the throttle a bit and let the engine wind out in one continuous long climb up.
Last edited by KCW; 07-09-2018 at 09:16 AM.