Makoto-sama
This is Kawaguchi Hidetoshi. This is my humble answer to the question.
Motorbikes are a hobby, and of course, I think an appropriate hobby can help relieve stress and change your mood, so I think it's really good.
However, they seem to be in trouble because their desire for motorbikes cannot be suppressed easily...
I think this can be thought of as “unrequited hardship” (gufftoku) suffering of not being satisfied whether one asks for it or not being satisfied.
Regarding “unrequited hardship,” we have also dealt with it in the answers to the following questions.
The question “Do you have pain when you're too happy?”
http://hasunoha.jp/questions/87
As an approach to “unrequited hardship,” of course, it is important to treat anguish as the cause and ignorance (fundamental ignorance) that holds back deep within the affliction.
When it comes to why we are not satisfied even when we ask for it, we don't know the essence of things and things, and for that reason, it can be thought that it is caused by captivity (obsession) as if there is an entity that satisfies us about that thing or thing.
Therefore, it is necessary to deal with feelings that are trapped by such entities and cause obsession, and as mentioned in the answers to the above questions, it is up to us to advance the understanding of “sky and luck” in Buddhism.
This is extremely difficult to understand, so if you are interested in Buddhism and are continuing your studies, I hope you will eventually work towards understanding it.
Anyway, as a way to deal with various addictions, I think it's a good idea to set rules for “self-control,” just as there is something called a “precepts” in Buddhism so that you can keep them firm. Also, if stress or mental problems seem to abstain as the cause of dependency, I think it will be necessary to deal with them as well.
Kawaguchi Hidetoshi Gassho