Left side radiator cool to the touch, while right side is warm...

I spent most of the summer battling overheating and high temps. Changed out coolant and properly bled. Pressure tested cooling system and held pressure for hours.

Now it's getting colder in the northeast so when I stop I wedge my gloves between the fairings and radiators (cold weather VFR hack, if you've never tried it, you need to!). So now I'm noticing that my left glove is still cold and my right glove is super warm. All I see is one hose connecting the two so a clog I feel is unlikely, unless the right side radiator is clogged?

Any ideas?

 

Hard to see from diagram, but coolant enters right radiator first, then returns to engine and the left radiator. I remember right radiator always hotter.