The '06 and '07 FJRs had a different throttle body cam profile from all other years, the profile on the throttle tube (hand grip) was the same. Changing the throttle tube cam profile with a G2 (or DIY as some of us have done) is an attempt to compensate for the abrupt throttle body cam.
Changing the throttle body cam would be a better solution, unfortunately it is not available from Yamaha as a separate item, and the whole throttle body assembly costs an arm and a leg.