Oh man, I got to "rejetting carbs" and had the momentary urge to toss a chair out a window and then dive out after it. Kudos if you'll do your own carb work, that's where I draw the line.
Unless you've got a burning desire to perform stupidly fiddly restorations on old lawnmowers there really isn't. You couldn't pay me to own a gas powered tractor, and EV conversion kits are starting to get good enough that dicking around with anything smaller than a dragster is less like a reasonable hobby and more like a weird fetish at this point. Full disclosure: I've got a holly 4 barrel sitting in a box waiting to go on my 62 fairlane this fall. I may be a glutton for punishment.
Rejetting carbs on your motorcycle that you use for commuting, goes from a fun weekend project to 1AM Monday morning nightmare really quick. :)