John Deere 212 Variator Drive Belt Trials: With the 212 on high HD jacks stands and chained to the concrete shop floor, using two men, one to operate above and myself underneath (find some courage) I observed the working of the variator and the levers as it was running and being operated. I did many trials with John Deere 212 on spec belts and other manufacturers belts. The JD belts, on spec width and length belts, with the primary at .61" wide and secondary at .63" wide, did not work that variator well at all, they are to wide for my tractors variator. Those widths did not move in and out of the variator pulleys much, if at all, when the variator handle is moved. Installing a more narrow Napa Green Garden belt on the primary and the secondary, (.48" wide) much more narrow, gave the variator the most effect. As the variator lever was moved back and forth through the first five positions the NAPA green AG belts walked in and out of the variator's pulleys changing gap diameters the most. The tractor was in gear, clutch engaged with the back wheels spinning in motion in the air during the tests. Also OK, with not quite as much variator difference, was the JD on spec belt on the secondary (.63" wide) and a NAPA on the primary belt at .48" wide. I matched the lengths of the NAPA belts to the two JD on spec. belts. The variator pulley wheels and center shaft on my 212 are in excellent condition, were adjusted for each belt change and it has a well lubricated mechanism with the spring set at medium tension. I am now looking to try a .50" or .55" wide belt in the JD style , HD thick woven industrial belts, but have not found that width yet. Try the more narrow and to my eye more flexible NAPA green AG belts on your variator drive belts if you can get no function of the variator and you know the mechanism is in good order. I do not know how long the more narrow belts will last compared to the more robust JD belts but your belts must walk in and out of the changing diameters of that handy sliding pulley system to work the needed ground speed changes well.