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Charging problem, F2

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born to be mild:
Hi All,
My F2 wasn't charging properly so maybe a bit hastily I bought a new solid state reg/rec unit for it and while I was wiring it all up again I decided to do a proper job and test the continuity on the new spade connections that I had made [ some of the old wiring had tiny cuts and splits in it so I cut them out and bought a new 6way plug to fit to the new reg rec plug] . I've taken the alternator cover off and tested the three yellow wires from the stator for continuity, all good but I cant get a bleep between the green & red wires from the field coil suggesting that there's a loose connection or the windings are shot. The field coil looks pretty good so I suspect that there's a connection in the crankcase/ drive cover that I cant see between the alt housing and where the cable emerges at the back of the crankcase prior to the 6 pin plug which goes onto the new reg/rec.
My question, does this connection exist apart from in my imagination that is and how do I get to it ? do I have to drain the engine oil to get to the thing?  I did loosen the drive cover screws and it started to drip which didn't make any sense to me.
any help gratefully received.

I've tried to show the test that I was copying off youtube but I don't think that it'll post as a hyperlink.

https://www.youtube.com/watch?v=K4q7sV0LpLs

PS; Am a bit loathe to drain the sump as the bike is presently adorning my dining room,,,,and yes, you're quite right, I am in fact single.

mike the bike:
I may be speaking out of turn here, being a 400four owner but why drain the oil?  Surely the alternator unbolts from the engine and tested on the bench.

Chris400F:
There is a workshop manual (titled CB750 K0-.K8, F SHOP MANUAL) in Ashimoto's Dropbox, to be found here if you haven't already found it: http://www.sohc.co.uk/index.php/topic,8884.0.html.
There ought to be something in there to help you with both the oil question and the wiring query.

K2-K6:
Most of the oil should be in the tank as it's a dry sump. You'll get a small amount left in the sump but shouldn't run out of there.

You do get a few dribbles if you take the alternator cover off but it should be just that and no real quantity.
As you've got it in the house you could always use an oven tray to catch anything that comes out, ;) may make the roast spuds taste a bit funny though.

There should be no real run back through the oil pump when it's not running so the sump shouldn't contain much and this is usually below the level of the alternator.

Might be worth tipping it over to its right hand side prior to removing the case to encourage any oil in the alt to run into the sump.

born to be mild:
Thanks guys, Ive got the alternator cover off already, not a lot in there at all which is probably how it should be, its the cover to the right of it ie, towards the back wheel,that I'm thinking the cables run through but point taken about the dry sump and the roasting tin . The cables run out of the alt cover then disappear back and inboard to reappear near the under the oil tank area. Point taken also about the workshop manual Chris, my Haynes is pretty poor, thanks. Your advice much appreciated all round especially since I only posted it a couple of hours ago, so thanks all.

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