I've used header wrap on a few of my race bikes, mainly to keep the belly pan from melting, but also for a bit of performance boost. Here are some tricks I've learned along the way:
Use the 1" wrap as it goes around corners better than the 2". It takes a bit longer to apply but the finished product is better.
Soak the wrap in water for a few hour first, it's easier to stretch around corners and shrinks for a tighter fit when dry. And use gloves as the fibers tend to get stuck under your skin, which is very irritating.
Along with the hose clamps at the start and end, I like to use safety wire every 3 to 4 inches. Just a single bit of wire just to keep the wrap in place and to prevent the whole thing from unraveling if it wears through or get torn.
To keep it nice looking, use header wrap spray paint (silver or black). Several coats will usually last a season. Remember to roll the bike outside and close all doors and windows in a 1 mile radius before you fire your bike up with the new wrap on.
2006 Paul Smart 1000
2004 Multistrada 1000
2002 Monster Race Bike
1995 900 SSSP
1978 900 SD
1969 350 Wide Case race bike
1968 250 WC
1965 250 Diana
1965 350 Sebring