Alright thanks for the help. I will try replacing the plug and going from there.

 

I would try new plug as it could have fouled out,or sometimes if plug is gapped w wrong type feeler u can damage the electrode an not be able to see it.The dealer told me when I bought bros Tb 400 he said the throttle has a safety device like yamaha Tors an if it cuts out etc it needs to be adjusted so it doesnt do this do to cable stretch.Your bike is too new to be having any serious problems unless u ran the oil tank out an bike got no lubrication..Hope this helps guy.Eventually I;d like to start modding it for him so its got more Hp but I dont know if Ya have to eliminate the injector system to do so.

 

I would definitely try the new plug first, that’s most likely the problem. My Scrambler would eat a plug about every 5 hours of ride time, I carried extras in the tool kit. Usually they would just crap out when I shut it off, but sometimes they would act like yours.