A question about chains and cables

The throttle cables are attached to the throttle slide(white plastic tubey thing under the grip)
You undo the two screws underneath the right control and separate the two half's. You will be able to get to the throttle cables once you have separated the two segments. Lube at your leisure.
I find a good oil based lube liberally applied and allowed to flow down the cable cores works wonders on slightly stiff and difficult to operate hand throttle...lol
engine oil....

For your forks
2 pence pieces if you haven't got any M10 washers as shims, the Haynes book of lies mentions 140cc of fork oil per leg, that'll cover the early models and 190cc for NB and later models.

The balance chain is adjusted by undoing an M14 nut which is located behind a chrome cover on the right hand side engine cover. A large flat screwdriver is required to undo it. You will need a long socket to undo the tensioner. Just undo and do back up to re-tension. The Haynes manual goes on about checking quadrant position but unless your gonna strip the engine to replace the chain I wouldn't bother about it.