1995 250 w/tranny problems
 

I have a 95 250r with about 5k miles. I am the original owner, have never abused, or laid down this bike, it is well maintained. My tranny will not shift out of 6th gear. I cannot locate a haynes or clymer manual for it, only a 500r. Can anyone advise if the 500r book will have 250 info in it? A trusted co worker works on bikes but wants to view a manual. Is this a common problem?
Thanks