Riding 2-up for the first time...
We have a rule, she never get's on or off until I tell her I'm ready. And I aways wait until she pats me on the shoulder to let me know she's ready before I take off.
:They should respond to curves/leaning like a sack of potatoes sitting on the back of the bike! A sack of potatoes neither fights the riders lean nor helps it...it just goes with the flow.
If the passenger fights your lean you end up needing more lean to make the curve....or you don't make it at all.

If the passenger "HELPS" you in the curves you can end up with too much lean and unable to control it...then you go down.

If the passenger acts like a sack of potatoes then you are in full control of the curve and lean angle and can respond with appropriate inputs. All is good.

Someone told me this a ways back when I was having trouble explaining it to a passenger on a ride and I've used that ever since. Somehow they get it then.
A new passenger should also be told that they are to become a part of the backrest. NO LEANING! Under any circumstance! Leaning in will tighten your turn, & leaning out will mean you CAN'T turn. The person on the back can actually control the bike. If the person on the back leans hard enough the rider CAN NOT turn in the opposite direction. If you don't believe me, try it............
Harder to do is convince the rider that if you should seem to be going down the only thing they should do is swing their low-side leg out from the knee down. On the low side the bike will slide off their leg & leave them separate from the bike. More useful at low speed than at high speed. My wife & I have proved this a couple of times in the last 30+ years............<shrug>
We also have a rule that the passenger can turn/look/lean/point/etc. above 40 mph. Below 40 she stays put! Above 40 the gyro effect of the wheels allows some motion. Below 40 the passenger movement becomes steering effect. Helpful or not, you don't need to be surprised by it.
The most valuable part of your life will be sittin' behind you! Keep that in mind with everything you do while riding!
One problem that I haven't fully solved yet is that my wife seems to get more active in the passenger seat at the exact wrong times. Usually when we are slowing for a stop or during parking lot maneuvers. This most often occurs when we are riding with a group. I will sometimes ask my passenger to dismount in a convenient place if I know I have to maneuver into a tight or awkward space. I don't think most passengers realize just how much they affect the handling of your bike, especially during slow speeds.
But regardless of the problems, I enjoy riding that much more when my wife rides with me.








