Have '07 also; found carburetor/engine more responsive with "22-cent" mod (fuel screw out 1.75 turns, needle shimmed (one # 4 washer), slide vacuum port bored 7/64" diameter), but ran o.k. stock.
Installed Eagle Mike doohickey and "torsion spring;" insurance only, OEM balancer chain tensioning system fully operational.
The "Tee mod," install tee fitting in carburetor vent hose and route auxiliary hose to a higher location (e.g., under seat or steering head) ESSENTIAL to prevent engine flame-out during water crossings much deeper than 10 inches.
Upgraded subframe bolts (four-bolt kit; the much stronger three-bolt drill-through kit's a more robust approach).
For trail survival, installed Happy Trails bash plate, and their Paris-Dakar nerfs and engine guard, to protect tank, radiator, and plastics. Tusk handguards protect clutch and brake levers in event of a fall.
One low-cost accessory I'd recommend, choke lever and left rear view mirror relocaton bracket (moves choke lever somewhat out of harm's way, and prevents grenading the left handlebar switch gear from collateral mirror stem damage, in the event of a fall.
Installed TPI 5-1/4" wide rectangular mirrors with dampers; TPI aftermarket headlight bulb with relay harness (turns "night into day," literally, compared with stock lighting).
Got aftermarket tires, more suited to my riding environment and style than the stockers. Installed EBC 320-mm front brake rotor, Gafler Green pads, MSI stainless-steel braided front brake line (massive improvement in braking control).
NONE of these modifications/accessories are mandatory; you can have lots of fun and reliable service, just going out and riding that bike, as is, stock!
Last edited by LoneRider; 08-12-2012 at 08:22 AM.