Transmission Problems

[wilson889]

Hello everyone, I am quite new to the world of cb750s. I have only worked on classic harleys.. sooo, my problem is on the transmission (while not riding) it seems it wants to only shift into 1st and then up to 2nd gear, and then after that it won't move up or "click". Is there a lock or something on these transmissions, that prevent it from shifting unless riding? Or will the transmission need to be tended to? It is a 1975 CB750k5.. Like I said I have no previous exp working with these type of bikes, soo all information down to last detail would be amazing lol..
Thanks all.
Kevin

[Spitfire]

If you are trying to change gears while at a standstill it may be a problem, have you tried it on the centre stand while moving the back wheel, or preferably is the change OK while riding.

Cheers

Den

[wilson889]

the bike doesn't have a centre stand. I picked it up from a friend so some mods have been done. And I haven't had the chance to ride it yet so I am not sure, that is why i was asking if that was a common thing, and maybe it will only shift when moving like you said. I just wanted to have everything set/fixed for the upcoming season. It was just odd to me, cause on a harley the bike doesn't have to move to shift through all gears.. but Thanks, I guess ill have to wait to ride..

[Bryanj]

To shift properly both gearbox shaft need to be turning so you need to ride it to see what happens