near stalling after letting off throtle

[yama_rider]

Haven't had a chance to try it, as now just had to replace the cracked oil tank.

It's true that the Apex will go for longer than any other sled but whoever said they were maintenance free is a fn liar lol. I did what I thought was a lot of pre season maintenance but first ride out, the crank sensor failed and I just discovered my buttons (slider ramps) in my secondary need replacing....$18 a piece from Yamaha for those little things!
But if I were you I would adjust the CO settings to see if it cures it. If it does, than it hasn't cost you a dime and it only takes a few minutes.