I figured out how to adjust the seat all the way back today. If you take the seat and adjuster off, there's a stop bracket bolted on the backside of the adjuster. Remove the stop and add three 1/4" washers to make up the difference(if not, the bolt is too long). This allows the seat to move all the way back against the bracket in front of the fuel tank. The only downside is the seat can rub against the bracket. The next thing I plan to do is raise the whole seat and ride adjustment assembly up about 2-3 inches.