2008 Outlander 400 needs low-end help!

My wife’s 2008 Outlander 400 desperately needs some low end to mid range torque. It is stock other than new Kenda 8 ply Bearclaws. I assume a clutch kit may be one way to go. Any suggestions for a clutch kit or any other suggestions. We do mostly trail riding in the Northeast. Not a ton of mudding but she wants confidence going up moderate hills. I also will be adding a 60" moose plow to do our driveway this winter. Thanks! :tools1: