I have a 2016 brute force 300 that the wife rides. Ran fine in January and then my son got hurt then covid and the bike sat till about 3 weeks ago. Starts right up and idles fine. Once you start to give it gas about a quarter throttle it bogs down and dies. I've cleaned carb, ordered a rebuild, bought an ultrasonic cleaner and ever mixed new jets with old ones. 2 new spark plugs. Its is the exact same from when it first started up. I've taken this thing apart over 20 times. I need help. The shop just said bring it in. They won't even point me in the right direction. Anyone know what could be going on?