Rear brake doesn’t work very well

Hello everyone,

I completed the Renegade brake swap on my 2013 Outlander 1000xt and now the rear brake doesn’t grab very much. I have all new Renegade master cylinders on the bars and I switched to the Renegade brake lines. The problem is that when I grab the left brake lever is doesn’t move much. In fact it’s all I can do to pull it enough to engage the parking brake. Does anyone have any ideas on what’s wrong?