Left cylinder cutting out under load

[Atvrider6566]

Was taking it down the highway in Kentucky to get too a trail and the left cylinder started cutting in and out. It will run fine at idle and will rev fine but as soon as I start to move and get to about half throttle the left cylinder cuts out. Tried to switch wires and replaced plugs still didn’t work. Both cylinders compression tested at 120psi. I was thinking I might’ve damaged a reed. What do you guys think?

 

 

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[Keno]

What do the reeds look like?

[375hp banshees]

Ya'll leave Tyler alone... look how far we've come