Along with the D240 was a backblade, cute little disk and a rather large three-point mower. Seemed to large for this 24hp tractor.
"Cute little disc" is about right. My YM240 came with a 5 ft disc that the prior owner said was too big for it, one reason he sold after owning both for less than a year and trying to disc a flood-irrigated walnut orchard. He lacked traction. I found on hard dry ground I can't pull that disc at a practical speed. It works great going over ground along a fence line, that had previously been disced by a larger tractor every year. (Photo below). The little 4 ft disc that came with my YM186D feels about right for either tractor for breaking ground - after its mowed.
Likewise the 5 ft box blade I bought for the YM240 to grade my driveway is too big. The dealer tried to convince me 4 ft was all it could pull. Yep. I couldn't pull a box of gravel, over gravel already in place, no traction. These rice paddy design tractors aren't heavy. Both those 5 ft implements were designed for Ford 8N with the same rated hp but a half ton heavier.
Mower? I bought a 4 ft rotary mower but wish I had gone 5 ft. No doubt it could run that.
And the Yanmar-Japan rototiller that was sold over there with nearly all YM2000's is a perfect match, it's 55 inches. Works great.
If you have the opportunity to buy it, I wouldn't go ahead before spending a half day tinkering to verify its in good working condition. But at least my experience with one in similar neglected condition, turned out to be nothing more than cosmetic.
Some photos I've posted here previously.
First trial run of the tiller. 540 rpm, then 1000 rpm that made fine powder. (This Japanese tiller is designed to run that fast).
Gamble that turned out ok: $3900 in 2003. Ain't she purty?
4 ft mower in high wet grass, it runs at a good speed.