So I recently bought a 1979 CB750k and it is my first street bike, but I'm having some troubles with it, with nearly 40,000 miles i wasn't surprised it needed a little TLC but I need some help. I can't seem to get it into 6th gear, I've looked around at other forums and tried their ideas, such as adjusting the clutch lever and making sure the shifter has enough room to fully engage and what not, but to no avail. Im sure I'll have to open it up but I'm not familiar with these bikes so I would like some help diagnosing this problem. Thanks