Polaris troubles

[Mechanix311]

my buddy has a 96 polaris trailblazer 250. The bike runs great with no load on the engine but the minute you drop it in gear and go it is a dog. we have tried jetting, carb cleaning, Dragging rear carrier bearing, dragging brakes and nothing seems wrong. any help would be appreciated. Thanks

[Heybo]

Check compression.

[Mechanix311]

Found it. It only has 100 psi and the manual says that it needs 115 to run. Just should have diagnosed it right thanks.