Sorry, I haveread many pages of this forum but can't find the answer.
My 998 has rotational clock/anticlockwise movement that seems excessive - about one full tooth (15 tooth sprocket). The gearbox shaft moves the same amount so the sprocket is secure on the shaft splines.
I have read comments that "some" play backlash is acceptable. . I have a video but can't upload it to the site.
Help please, newby on the forum.