Wifes sled is a 99 FZ 500.We are going to run it 1 more season probably(unless I get a deal on a REV)I believe in preventitive maintainance and was wondering if I should change them out in the off season or will they last?

mxz7,
*my 74 yammer in the barn still has original gas lines and still very pliable.

Unless you store it in the middle of a field with the hood off all summer you got many more seasons to go. http://www.snowmobileworld-s2.com/forums/iB_html/non-cgi/emoticons/biggrin.gif

You've got at least two more seasons left. Everyone has a different opinion and mine is change them every 4-5 years. Keep checking to see if they are rock hard or still pliable.

Sounds good zert.This sled was built in 98 so technically it will be 4 years old this summer according to production date. The fuel lines on my old Safari went bad after about 8 years.Sucks to have any type of breakdowns due to lack of maintainance.I see it all the time at my auto shop.

you should be able to squeeze a few more years out of the fuel lines, *if you are concerned *then ckeck them for stiffness, if they get stiff change them.