I use Mobil 1 fully synthetic 15/50 in my Mk1.
Modern multigrade oils contain a detergent; therefore it is very important that the inside of the engine is clean before you put it in.
As it has had a recent rebuild that should have been done. If there is any doubt, simply remove the timing cover ...

Hi Simes. I am also a Solex AHD fan. I have been restoring, and playing, with them for more years than is healthy.
The first thing that I would suggest is to set the fuel level. It should be level with the bottom of the air intake; although plus or minus a millimetre makes little difference.
Unlike ...

It seems to me that you need a PWK30, not a square four, expert; to answer your questions.
The fact that the idle mixture screw does nothing suggests that the throttle slide is already too far open at idle; and that most of the idle fuel is actually being supplied by the needle jet.
It may be that a ...

Just a thought Brian. Did you get a dynamo control unit with the bike?
If so, what make is it?
I'm wondering if you have a non Lucas type of control unit.
The Lucas system controls the output by varying the current flow between terminal D and F.
There is an alternative system which controls the ...

As Mick says, The Field coil wire; which looks to have been extended; should not be connected to the D terminal. It must be connected to the body of the dynamo. I believe that this is your only problem.
One of the brushes is earthed. You could connect The Field wire to the same point.

Where does the black wire, which is connected to the D terminal, actually go to?

Hello Brian. Assuming that you are spinning it fast enough; a battery powered drill may be too slow; then the most likely reason for lack of output is that the residual magnetism has faded away, due to lack of use.
As its name suggests, residual magnetism, is what's left in the iron pole pieces ...

The best solution, in my opinion, is to remove the lead plates from the battery and replace them with LiFePO4; Lithium cells. You get a lighter, longer lived, higher capacity, faster charging, and maintenance free battery.
The only problem is that no one makes a LiFePo4 to fit the square four; so ...

It should not be possible to move the contact breaker assembly. It should be firmly fixed by the central screw. I can see what looks like a piece of copper shim between the central screw and the hole in the brass, which should not be there. The screw should be tapered to match a tapered hole in the ...

I've restored around thirty Solex carbs over the last ten years or so. Mostly AHD/G 30's for vintage cars, and half a dozen AHD 26's; three of which are currently adorning my fellow members Mk1's
Provided that they aren't corroded; they can almost always be restored to, as new, performance.
They ...