If you are comfortable with pulling the engine and have room to store all the parts so they don't get lost. I say pull it and take them the engine.
There are BBK available if you want to up the power a little while it's out and depending on what needs replacing.
Have you had the clutch off yet? The reason I ask is mine wouldn't start out on the trail and it was do the the clutches melting down and seizing the engine from turning over. Dealer replaced clutch parts under warranty and updated starter and was good to go.
Those clutches will sound like a grenade when they go and the belt disintigrates.
2010 Prowler XTZ 1000-
27" Grim Reaper Tires/Home Made Roof/Arctic Cat Mirror/Quadboss Folding Windshield w/ home made support bar/LED Tail-Brake lights//Venom 4000 lb Winch/Amsteel synthetic line/Home Made Doors/Custom Adjustable Seats/Custom Oh Crap bar for passenger/Tonneau Cover/Fat Max storage Box in bed
Tiger Tail Towing system