2016 Zforce 800 Trail.  Only 340 miles.  Bought December 2017 -cearly havent used it much. 

Trying to get it tuned up for the summer and couldn't get it to start. Could jump it and it would run, but if we put in reverse it would stall and wouldnt start again without a jump.  Tested battery and it was toast so now have a new battery.

So it starts right up strong, but instantly cuts out if i let off the gas.  I was able to start it in low and drove it around for about 30  minutes.  Put in park and let off gas - again, instantly stalls. 

Any suggestions would be much appreciated. 

Thanks!

[2015 Z Force 800 53/Trail EPS]

Going to have to have it checked-out. If there is no issue with the battery or charging system, jumping a bad battery has been known to toast a ECM or sensor. Might also have some corroded connections at the main or distribution fuse blocks. Just guessing..but check the voltage at any coil while running..if less then 12.5 Volts, then there is a problem.