Suspension re-spring/re-valve: Never met a bike that didnt need the suspension tuned for the individual rider.
Proper skid plate: No explanation necessary
Side stand relocator: see above
Rekluse: Some folks like the Rekluse, others don't. Its a personal preference, but it makes the 500 lb beast way easier to handle in the rock gardens or in any slow technical terrain.
Scotts stabilizer: The bike tends to get ridden fast in off road conditions. Will guard against tank slappers that would otherwise result in intense pain.
Essential mods are an individual thing, and there are a lot of other mods I like as well, but these are my top 5 for how I use the bike.
Others to consider:
Excel A60 front wheel with oversized spokes
CJ's water pump kit
Cut down stock wind screen to get your helmet in clean air
Riding the Americas: No Fumar Espaņol
crashmaster screwed with this post 08-21-2013 at 08:06 PM