My GC1720 started going really slow in reverse. Forward speeds were normal. This is how I fixed the issue.

Installing a factory trail and rock gated shifter in a RZR S 1000. This uses the RZRWorks adapter plate. This also works on other years and models. No more searching for a forward or reverse gear or accidentally finding park during a critical moment.

I installed a Reverse Osmosis system to top off my vertical machining center coolant tank with almost pure water. I also did some other upgrades and did a quick overview of past upgrades. Products used in this video: RO Complete Kit - Amazon http://amzn.to/2fwqzOJ

R&D on the RZR Canbus to enable turning on rocklights at low speed and get a reverse light signal.