Hello Tam! I agree with Michael. It is quite natural to say "get on/get off", "jump on/jump off" and "hop on/hop off" when speaking about climbing onto any type of transportation that is "ridden on" for example a bicycle, a motor bike, a bus, a trolley-car, a train etc. One doesn't actually physically "hop" or "jump" - these verbs are used hypothetically. When speaking about getting into a car then one would say "hop in/hop out" or "jump in/jump out". To use "hop on/off", "jump on/off", "hop in/out", "jump in/out" would definitely be a kinder way of of saying "get on/off"or "get in/out". I hope that helps!

Thank you for your help!

I think get on and get off are probably most commonly used. Hop on / off and jump on / off are possible, and quite informal. Climb on, slip on, step on, even slide on - none of these are forbidden. In older or more formal times. mount your bike (like a horse) would have been normal. In informal British English, "on your bike" is also used as a not-very-polite instruction to someone to go away, and to "get on your bike" is used to indicate taking active steps to overcome some difficulty, start a new activity or look for work https://forum.wordreference.com/threads/get-on-your-bike-for-look-for-work.2607493/ https://idioms.thefreedictionary.com/get+on+your+bike https://dictionary.cambridge.org/dictionary/english/on-your-bike https://books.google.com/ngrams/graph?smoothing=3&corpus=26&year_end=2019&year_start=1800&content=%2A+on+your+bike%2Cmount+your+bike&direct_url=t2%3B%2C%2A%20on%20your%20bike%3B%2Cc0%3B%2Cs0%3B%3Bget%20on%20your%20bike%3B%2Cc0%3B%3BGet%20on%20your%20bike%3B%2Cc0%3B%3Bback%20on%20your%20bike%3B%2Cc0%3B%3Bout%20on%20your%20bike%3B%2Cc0%3B%3Bhop%20on%20your%20bike%3B%2Cc0%3B%3Bride%20on%20your%20bike%3B%2Cc0%3B%3Byou%20on%20your%20bike%3B%2Cc0%3B%3Bjump%20on%20your%20bike%3B%2Cc0%3B%3B%3B%3Bwork%20on%20your%20bike%3B%2Cc0%3B.t1%3B%2Cmount%20your%20bike%3B%2Cc0

In english - you can use: get on your bike, hop on your bike, or jump on your bike. All are correct.