Arbitrage has good points about considering related ongoing costs to any purchase. And MMM had a great blog post recently about renting a Tesla.
I totally understand where you are, though. I'm younger than you are, but already realizing that I just won't be able to enjoy my money in the same ways in 20-30 years as I can now. For example, long-haul travel is already becoming harder for me due to an accumulation of neck/back injuries, and my own parents are no longer willing to travel at all (they are in their 70's). A trip to Europe, Asia, Oceania, even Hawaii? I need to go sooner rather than later. Skiing is another hobby I love that is expensive, but it's hard on my body and getting harder as I get older. I grew up in a literal ski bum family skiing 1-2 times per week all winter, but the demands of my working life slowed that pace down dramatically. When I find time to ski now, my feet & knees hurt more, my hands hurt more, and then there is the whole neck/back problem. As much as it would be awesome for me to ski right off into the sunset, I'm having to face the reality that skiing will eventual become quite difficult if not impossible. My parents are no longer able to ski, and they were absolutely die hard skiers, but at some point the deterioration of one's body or brain just shuts off an avenue of fun.
So, I need to travel now. And I need to ski now. That's reality.
And that's all ignoring the fact that our 'staches could just all be siphoned towards extremely expensive long term care! And it might not even happen by our own choice! Watch the movie "I Care A Lot" on Netflix if you really want to be freaked out about that.
In your case, I can see motorcycles as being a hobby that has a definite shelf life in terms of aging. Fanny fatigue is an issue even in your 20's! So, if you are really into motorcycles, I think you should indeed spend quite a bit of time researching what new motorcycle you would want. Plan every detail of it. This make & model or that? What color? What kind of tires/rims? What accessories? Read the reviews, take multiple visits to different lots window shopping. Think about the extras that would be functional and meaningful. For example, do you need new motorcycle gloves? How's your helmet? Your jacket? The shopping and planning part is at least half of the fun of getting something like that. As you window shop, your 'stache will continue to grow a bit. Eventually you will know exactly what you want and you can just buy it. And ride it. And you deserve it!
Seriously, I just pulled the trigger on doing this exercise with ski stuff. I still was using skiing gloves from when I was a teenager! Yeah, those gloves served me well but they are shot, I should feel no guilt buying new gloves. But I still felt guilty. Are these new warm gortex gloves that fit me perfectly really $60? Hmmm, that's really a lot of moula for gloves. Shouldn't I get something cheaper? What can I get on Craigslist? Okay, these used gloves I see are Craigslist aren't exactly what I need or would pick out, but they'll work and they are only $5. I wore my old ski boots until they literally split in half. And then I went on Craigslist and I actually bought a pair of used ski boots to save money . . . they were nice, nearly new boots, except they were just slightly too big. So as I was trying them on at the seller's house I convinced myself I could wear thicker socks to ski. I did that: still too big. Skiing just wasn't as fun with boots that didn't fit quite right. And then I realized I was being extremely silly by not just getting what I need to enjoy this hobby fully while I can. Used, sure you can shop around, and sometimes you will really luck out, but in the end you get the one option that a seller is selling. In a store I can try on 6 different pairs of boots and get exactly the right size. I needed to shed my lifetime of weird habits around making do with subpar stuff literally all the time.
So, I vote for overcoming your guilt and habits and doing what will bring you true joy and fulfillment. The point is definitely not to die on a giant hill of cash, after all. The point is to find meaning and joy in your life.