I thought that you are supposed to bleed furtherest from the master cylinder, proceeding to closest. On an automobile, that would be right rear, left rear, right front, then left front. I know that on an atv the distance between the two fronts is marginally different, so it may not matter. I bled the front brakes on my 300 left then right, and got all the air out easily. Obviously, the opposite worked for you.I use two lengths of clear hose to drain brake fluid into a beer bottle. Put an bend in them to keep air from getting into the nipple and to judge the color of the fluid as it comes out. I use a piece of Velcro strap to keep pressure on the lever. At some point you will want to remove the sludge from the reservoir. I use a clean shop rag and a clean flux (acid) brush. Throw away everything when you're done.
I bleed the short line length first then longest length, so right brake line then left brake
If I'm mistaken someone please lmk