hi after running about 20 min my 2020 uforce 800 will not idle down stays around 2000rpm and hard to shift. sometimes have to shut machine off and restart. know this started since i have been plowing this year with it. looking for suggestions to this problem.

[2015 Z Force 800 53/Trail EPS]

Obviously first look for any mechanical reason like frozen throttle cable, peddle or throttle body linkage. After that check the idle air valve as well as the air temp sensor and the TB heater.

I had the same problem with my 2018 u force 800. The throttle position sensor had to be adjusted. There is a post on this forum explaining the procedure. You will need a multimeter to check voltage. Its very simple to do.  It might be posted under how to section or z force section.

Its in the how to's under z force 800 throttle position sensor specs.