Chainsaw Clutch sprocket & Oil Pump leak.

Repairing a old user Yamaha 9900 Chainsaw oil leak and removal of chain sprocket drive. The problem with this chain is that it always leak chain lube oil on the floor when it's not in operation. The Chainsaw also lack lubing of the chain and bar. Let see what can be done to restore the Chainsaw to safe operation.
Thank you.
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