Hi,
Since I have had experience with both electronic cruise control and throttle locks, I can with certainty that for about the same money as a throttle lock, and a little more time wiring, you can have a well functioning electronic cruise control that will hold the speed uphill and downhill. If you live in South Florida, you might be able to get away with a throttle lock, but elsewhere, you will set the throttle lock at 60 mph on level road, and at the first hill, it will slow to 50 mph, then speed to 70 mph downhill. My Rostra Cruise Control will set at 60 mph on level road, and the first hill, might drop a mph or so, depending on the steepness of the hill, and might increase a mph on the downhill, depending on the steepness of the hills.
I used a Goldwing Cruise Control Switch on my ST1100, so it looks like it came on the bike. I followed some instructions on connecting the wires to the cruise control, and used a Dremel tool to hollow out the Lead piece that fits on the throttle cable to allow the cruise control loop to fit in the slot on the wheel the cables attach to. It has worked perfectly. I didn't have to fashion a swingarm in the tight space.
If you decide to give it a try, there are many posts that address any problem you may face. On my ST1100, there was space under the right side fairing to fit it between frame supports to the fairing and the plastic. The connections were mainly in the area in front of the air cleaner housing.
Since I have had experience with both electronic cruise control and throttle locks, I can with certainty that for about the same money as a throttle lock, and a little more time wiring, you can have a well functioning electronic cruise control that will hold the speed uphill and downhill. If you live in South Florida, you might be able to get away with a throttle lock, but elsewhere, you will set the throttle lock at 60 mph on level road, and at the first hill, it will slow to 50 mph, then speed to 70 mph downhill. My Rostra Cruise Control will set at 60 mph on level road, and the first hill, might drop a mph or so, depending on the steepness of the hill, and might increase a mph on the downhill, depending on the steepness of the hills.
I used a Goldwing Cruise Control Switch on my ST1100, so it looks like it came on the bike. I followed some instructions on connecting the wires to the cruise control, and used a Dremel tool to hollow out the Lead piece that fits on the throttle cable to allow the cruise control loop to fit in the slot on the wheel the cables attach to. It has worked perfectly. I didn't have to fashion a swingarm in the tight space.
If you decide to give it a try, there are many posts that address any problem you may face. On my ST1100, there was space under the right side fairing to fit it between frame supports to the fairing and the plastic. The connections were mainly in the area in front of the air cleaner housing.