My rules are
1)never faster than 50kph(30mph)
2)never 20kph over the flow of traffic.
3)Keep out of blind spots
4)ALWAYS be wary of an open space. ALWAYS ASSUME that somebody will change into it. Even with that watch the persons front tires. If they're not sticking out they can cut you off.
5)Never do it where traffic is merging
6)Only on the highways in between the left most lane and next one over.
Not legal here either but I do it safely.I break my rules time to time but only the speed one. You don't realize how easy it is. Most reckless thing i've ever done was a car ahead tried to block me in purposely and I got mad, so a quick weave around his car on the left and back. He wasn't expecting that
The 250R can handle.