Here are some pictures of the Kolpin fuel pack system for the Sportsman 2005-2012 & Sportsman XP 2009-2012. It is a nice set up for someone who wants to have the fuel option when needed. They carry 1.5 gallons. These will not work with rear boxes. because of the size and type of mounts they use. They can be mounted on either side of the unit. Any other questions feel free to ask!

http://www.theatvsuperstore.com/POLA...K-p/252220.htm

 

Will these fuel packs work fine with a rear ATV soft bag type of luggage? The fuel packs are an awesome option but the rear bag is a must have!

 

As long as the bag is not wider then the rack you will be fine.