A883 2nd & 3rd question

check that some dipstick has not installed the wrong mainshaft bearing. this is the main ball bearing at the junction of the tail and main case. some years had a snap ring in the housing, some i think had a ring in the bearing. been a long time. but make sure the bearing is correct and does not allow front rear shaft play this will mostly affect 3rd, but will also shift the position of 1 - 2 relative to the shif forks