Polaris sells a very trick 2.5 gallon can that comes with straps and snaps for like $25, they are made for the RMK 900 but I found that they work awesome on my viper. The gas can is not your typical gas can since it is short and squatty compared to all the other general 2.5 cans that are now tall and skinny. To strap the can to my sled I drilled some holes in my tunnel extension and installed U-bolts to thread the straps through. I bought U-bolts from Lowes that came in a package with nuts and backing plate, since I needed nuts and backing plate for above and below the tunnel (sequence goes nuts, backing plate, tunnel, backing plate, nuts) I bought 4 packs, I then bought a snowboard stomp pad with an adhesive back to act as a slip resistant pad for the can to rest on, the can does not budge and with the backing plates my tunnel looks perfect even after hitting large jumps/cornices and bumpy trails at high speed. Very impressed with the set up and having the extra 2.5 gallons is a life saver.