If you drive a motorcycle (class 5), use a lane that accepts all vehicle categories (with no height limit) and all payment methods or use an "all classes" electronic toll payment lane, which is often located at the right of the tolls and detects the vehicle category.
Make sure you do not take the reserved T 30km/h lanes for class 1 vehicles, as you may be charged at the price of a class 1 vehicle.
Motorcyclists have a dedicated electronic toll payment lane
at the right of all tolls on the A13 and A14 motorways between Paris and Caen.
(See advantages of the Bip&Go Liber-t badge for motorcyclists)