Don't think there is a reserve tank or a parking break lol At least didn't notice any on my SE yet.
In theory when you are at that 4 L level your fuel warning light turns on so you have time to refuel before running out. If you continue riding it will suck that tank dry. As with any fuel injected machine you want to avoid running the fuel pump dry.I just saw in the manual pg 4-20 that there is an 18L capacity and a 4 L reserve. I wasn't sure what that meant and wonder if it is just advertising speak for an 18L tank with 4 L unusable? Anyone know?