When should you check your lines?
Lines should be checked every 25 jumps – even less for thinner lines, 15-20 jumps max.
How should you check your lines?
Check lines for abrasion/fuzzyness. Brake lines wear faster than suspension lines generally.
Pay close attention to connector link end loops (the ones that go on your slinks). Wear can occur on the inside of the loops so make sure to get in and have a good look. Outer most loops tend to wear the hardest.