1983 Yamaha XJ900F

Thank you for allowing me to join this forum. I have recently purchased a very nice 1983 XJ900F with only 16,000 miles. The bike runs great to 7k. I suspect a carburetor issue because of long storage. I would also like to have an idea of the value of this bike. I understand it was only available in the U.S. in 1983 as the 900. The bike is missing the air duct pieces under the front of the gas tank.