The gearbox is in great shape, I have used it in another bike before, so i know that there isent anything broken in it. I remember that i had this problem when i disembled the gearbox many years ago. The kickshaft had to be in the right position when being reasembled.
Is there any way to get things in the right place without having to take everything apart? The gearbox Is mounted in the frame with clutch and everyhing.