Besides a little more Umph... in the seat of the pants there is no real advantages that I can see by doing it...... Unless you want to race... Most people re-jet so they can say... or have the feeling that the bike is more powerful... just for the sake on knowing the bike is given a little more potential regardless if it's really an advantage for your need.... Been there, done that.... I have done the re-jet, breather, drag pipes etc. for the HP and torque gain.... and yet rode like "I always" rode and never used the improvements for any personal advantages... Parts for show are a horse of a different color... Guess what I'm getting at is: Engine mods are usally a waste of good money unless you intend to take advantage of what the mod will do for you... and if you don't intent to race or drag.... or change your riding style, then all you are doing is dumping money in a bike for unseen, unused reasons... I was once addicted to Harley Parts, Mods, and spending tons of money. It's like home improvement projects... A new bathroom or kitchen will usually pay dividends when you re-sell... but a pool in the back yard is just a hole in the ground to pour money into... Just my opnion and it's your money, your bike and whatever makes you happy.... Live and let live... Ride hard..