I recently bought a 2021 Uforce 800 side by side, very intermittently it will go through a phase where it will not start.  I can turn the key to on, I can hear the fuel pump power up, the dash board lights up and goes through all it's test, the gear shift moves and I can see the gear display on the dash but if I turn the key to start I get nothing, no click, no sound, nothing.   It seems like if I move the gear shifter in and out of gear while turning the key I can get the starter to hit but I'm not sure if that's connected or just luck but to me it does seem connected to the gear shifter.  Any ideas?

[2015 Z Force 800 53/Trail EPS]

Welcome. They all have an interlock system where as the starter will only engage if it is in neutral, park or if in any movement position, the brakes are on enough for the brake lights to come on. All close relays that allows the starter AUX relay to send power to the starter solenoid. So...check that the dash lights for Neutral and park are lit before the key is turned to the starter position. And if they are and it still won't engage the starter, depress the brake and try it again. If it then does, there is a bad relay. If it still won't then test the key switch as there have been many that have gone bad...they are not water tight and can get water in them and corrode.   

Thanks, would you happen to know where would be the best place to get a new relay? 

[2015 Z Force 800 53/Trail EPS]

Thanks, would you happen to know where would be the best place to get a new relay? 

Any CFM parts house but you must test them first to see if any are actually bad. It could be just a bad connector somewhere or even the gear sector switch of the dash lights are intermittent at times. It provides the ground for the lights and the relays.

I recently bought a 2021 Uforce 800 side by side, very intermittently it will go through a phase where it will not start.  I can turn the key to on, I can hear the fuel pump power up, the dash board lights up and goes through all it's test, the gear shift moves and I can see the gear display on the dash but if I turn the key to start I get nothing, no click, no sound, nothing.   It seems like if I move the gear shifter in and out of gear while turning the key I can get the starter to hit but I'm not sure if that's connected or just luck but to me it does seem connected to the gear shifter.  Any ideas?

Welcome. I have 2 800's, '21 1nd '22. My '21 was doing this about a year and a half ago and I found it to be a bad relay as NMKawierider says. I got spare relays for mine thru ebay. Do a search for  Auxiliary Relay 9010-150350 CFMOTO,  about $7 each. Swapped out and no issues since