Also cleaning the inside of the gas tank is probly a good idea if your quad is older.. What i did was ...I took a 3\4 clear tube and connected this to my shop vac with some electrical tape..and stuck it in my empty tank and sucked up the loose crap by the petcock..( there was alot of sh*t in there, I was suprised ) Thats where most of the sh*t will be..