Gearbox removal
When the barrel is taken off it reveals a rectangular rubber bung that seals a slot in the rear crank case mouth. When the bung is removed the conrod can be lowered until it lines up with the conrod cutout milled out of the LHS crankcase. To expose this cutout the magneto and then a side plate have to be removed. Once the clutch is removed from the RHS the cassette gearbox can be withdrawn.