it's not an upgradeI installed a muzzy fan on my 2011 ZX14. That bike needed every degree of cooling. As for my 2012 ZX14R. Piece of mind for my 2012 14R. I was able to get my 2011 to run a little cooler by using engine ice and the muzzy aluminum fan, thought I would do the same with my 2012 14R.
I have already noticed while idling my bike in my garage with absolutely no air flow, I could feel the cooling fans would flow more air than before. Plus, the cooling fans didn't stay on as long. The temp gauge dropped a little quicker than normal.
I spent $70 on the fan blades and $44 on two 1/2 gallons of engine ice coolant. So for about $115, it's a cheap upgrade.
An upgrade is when something is wrong.
If $115 gives you peace of mind, fine.
I'm $115 richer than you.:nana