For the Burgman 650 it depends on which coolant is used. There is a Suzuki Long Life coolant and then there is the Suzuki Super Long Life coolant. Never mix coolant colors or types even if both can be used in the same engine. I still have a few bottles of the Suzuki Super Long Life coolant that I plan to use.
The Burgman 650 service manual calls for changing the coolant every 4 years or 29,000 miles (48,000 km), which ever comes first. I believe that is for the Super Long Life coolant. The Long Life coolant calls for every 2 years or 7000 miles.
As I said. Always a good idea to at least check it. Make sure it doesn't change color (that's bad) and that the level in the overflow bottle is where it should be. Inspection slot is on the left side in the front wheel well just in front of the slanted part of the left foot board. I will likely change coolant on my AK initially at the 12,000 mile interval and then put the Super Long Life coolant in for a longer interval. I have read about some Burgman 650 owners going well over twice that with no issues. One even stated he hadn't changed it in 10 years, but don't know how many miles he rides in a year.
I also think that it is a little overkill. How often does it get changed in a car? The service manual for my Honda CTX1300 says to change it at 24,000 miles with standard coolant. That's the same as the ST1300.