In other words it might be worth replacing while it's open...
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Dont worry you will be opening it a lot

Kidding loved mine. All things to check :
Rocker bushes
Cam chain and guides (reed valve wear)
Cush hub spacers like you did
Clutch springs
The bag filters in the motor, they catch all the metal crap that the engine eats up
Battery tray cracks
Sub frame cracks
Foot peg bolts can break / stretch
My ignition wore out so you could remove key after switching it on, could be issue on older models
Check that the wires do not get rubbed through under the battery, happened to my friend on his Fi 610