You can count on having bigtime fuel system problems. Plan on rebuilding the carb including full disassembly and cleaning in a nasty chemical dip and/or ultrasonic tank. I used to work as the sole mechanic in a small shop where the owner never met a neglected ratbike he would turn away, so I rebuilt many many carbs on bikes that had sat around. As previously noted the tank will be rusty too.
The cylinder may be rusty and the rings may be stuck. The brake calipers will probably need complete rebuilds too, because brake fluid that has sat that long will have collected a lot of water. Often, there is too much corrosion in the master cylinders to even allow rebuilding. The calipers can usually be rebuilt.
Personally, I would rather buy a bike that had higher mileage and had been ridden regularly and maintained than a low mileage garage queen. Motorcycles aren't designed to sit around unused unless you follow proper lay-up procedures, and almost nobody does.
Last edited by michaeln; 07-31-2007 at 10:08 AM.