sx 500r broke the drive axle inside of one of the drivers and it fell apart 20 min down the trail from the resturant.
the seat riser/fuel tank/tunnel extension was made by my brother so that he had 5 gallon aux tank and it moved the seat back and up as he is 6'4" tall and it made it more comfortable for him to ride. you filled it through the seat flap and it held 5 gallons of gas. made it so he had the same fuel range as a sx viper or my rx warrior but was more $$ to fill for same result.