#4 PostAuthor: Garn 1 » Sat Sep 22, 2012 10:08 am
'Puddin, If you find it isn't in the selectors forks and you do have to split the crank-cases, you could find that the 4mm washer (known as thick washer) may have been unwittingly replaced with a slimmer washer. This was the case when I had a disaster a few years back.
This 4mm washer is next to the ball-bearing on the sprocket (output) shaft. Now if it Ok, Inspect the second gear oval slots and the engaging pegs on the 5th gear, both of which are close to this ball bearing, on this output shaft.
Usually, the culprit will be the rounding of the pegs on the 5th gear, which will not allow full engagement in the slots of the 2nd gear to drive it. You may need to replace this gear. Unfortunately, the roundness (wear) on the pegs cannot be inspected from the sump!
RegardZ.
Garn (Sydney) Z1, Z1A, Z1B and Z900-A4