Jinma, Foton, TYM, Belarus, Yanmar, Branson, Montana, Mahindra and maybe some green and orange too.
They only made them for one year. I had one for about 5 years and it was great. The PTO finish mower on the back was a Woods 4' finish mower with a 2 pt. hookup to the Terrapro. It was by far the best riding mowing machine I've ever been on. Take the mower off the back, pull two pins, and it made a great 2 wheel drive 4 wheeler to boot. The only downside was that the 350cc engine lacked a bit of power for mowing if you let the grass get too high. I think I recall the manual saying that it only put out about 14 PTO hp. If they made one of those in a big bore, like my 750 KingQuad, in 4X4 I think it would be awesome! It make a joke of the Swisher pull behind finish mower I tried before buying the Yamaha Terrapro. Besides doing a rather poor job, the engines on the Swisher never seemed to even last one full season before being completely shot. Swisher blamed it on running in dirty air all the time. Duh!
your right dargo with the big bore quads they have today a pto would work good. my alternator kit i bought for my hpx had a adaptor for something to mount to the flywheel to run something else like a pump or something maybe sisne i don't run it in the mud anymore i should look into making a pto for it. and putting my alternator back on it too i miss all that power i had.
Another big plus if they did it now with a bigger engine would be the water cooled engine. The terrapro's were just underpowered IMHO.
Dargo, the "rough" cutter they sold did not work as well as the finish cutter on the grasses I tried to cut. It just didn't have the ooomph. The finish mower would cut thru the same grass.
If I remember right, they were sold in 1985. I'm thinking the price with a cutter was nearly $5000 back then. I didn't have a clue about farm use of ATV's except that farmer's used them to get around. One phenomona that happened, when the smaller tank 12V sprayers got popular, I know many farmers bought ATV's just to spot spray and ended up telling me they didn't know how they ever got along without one.