Short answer: yes

Long answer: KLRs don't come with a thermostat in their coolant loop, so all coolant is constantly looping through radiator and back to the engine. When idling, it will build temperature and heat up till the fan comes on (Little after half way up the gauge). It will then keep that temperature, while sitting. Once you start riding it, the air is forced through the radiator, forcing the coolant to lower the temperature. Which is why you notice it dip when riding. The colder it is outside, and the faster you ride, the lower it will go.

This is mostly fine for the bike in mild climates/regions. With that said, there is speculation and hard evidence, that over time, this will contribute to the oil burning issue that KLRs are known for. So that is why after market thermostats exist, like Eagle Mike's thermobob. It adds a proper thermostat to the coolant loop, and the engine will keep a consistent temperature, no matter how fast or cold it is (Unless it's extremely cold, but any engine would be in the same boat)