Jus' before goin' undercover, brother..
I did the gear oil change, first. The photos of the final drive case in the user manual and in the shop manual (gleaned online here) both depict a completely different case configuration than what's on my Agility 125, with a drain plug that faces downward. If yours looks like mine, the photo above will help you figure out what's going on.
The oil that came out was a very dark, olive green in color... much darker than the SAE 80W90 that went back in (which was also greenish in tint, but looked more like extra virgin olive oil).
Yep, I overfilled the gearbox by about 100ml... so I waited. And waited. And waited... until it stopped weeping out of the filler hole. It's easy to overfill, since there's no damn way you can see back in there to see how full the gearbox is. Since the manual says, "... to the bottom edge of the fill hole," I figure once it stops weeping out while on the center stand, on level ground, it's as full as it should be. :)
Woke up this mornin', got myself a gun... well, no. What I did was lose my glasses, dammit, Jim. But, I got off early, and it was a beautiful day to leave work at 2:48. And, it's my birthday!
Here's the Agility 125 chained up to the Yamaha Vino 50. Not impossible to pinch, but more difficult.
Chained, covered, smothered.
First real fill-up, today. Surprisingly, there's a little audible alert when the fuel gets low. My perplexing problem: The specs say the tank will hold 1.32 gallons, but I pumped 1.45 gallons in (making me wonder how accurate the fuel dispensing equipment is), and the fuel gauge isn't at 100%. Unlike the Vino, the filler neck of the Agility is a perfect fit for the fuel nozzle, so it's tough to gauge how full the tank is when re-fueling (and if you've ever put gas for your lawnmower in a little can, you know how tough it is to make the fuel flow slowly enough into that to keep from overflowing and making a mess, eh?).