This is a standard MkII head problem. The standard solution is top hats.

Ariel mucked about with the oil feed studs on the KH in later years and ended up issuing a Service Bulletin as a basic admission that it would have been wiser to leave well alone. You may well have a KH stud there.

Gearbox housing in the (AGA) oven, bushes in the freezer, line them up and drop them in.

The Square Four mainshaft is 3/16" longer than the singles one, from memory. Check that the splines on the clutch end are the same length. Longer clutch splines came in in 1948 and mixing pre and post 1948 gears and shafts is a recipe for disaster. The short clutch spring cups are correct. The ...

Simon is certainly right when he says that the VIN number has been mis-interpreted. Two stroke numbers went up to around 36,000 so the number you quote, even with the 8 translated as a B, is too big by a factor of 10. I have looked in the Despatch Books for obvious matches, dropping a number here an...

Try Club Spares (Goeff Brown). CP spares are quite plentiful.

The VHA went out of production in 1953. The Monobloc was produced from 1955. Personally, I find the Monobloc less trouble than the earlier carb but I have run earlier carbs on the Red Hunter for over 30 years now and haven't changed to a Monobloc so they can't be too bad.

I had a Swallow Jet80 sidecar at one stage so I know the bushes you mean. As others have said, they are either Metalastic or Silentbloc and a Google search gives you leads for either.

Mick, My crash / badge / oil gauge / clock bar on the KH(A) is based on the Britax bar so the dimensions are similar, although not identical in one or two places. Each bar is 12" long and made from 1.150" hex. The hex is probably what I could find so the dimension may not be the same as th...

Luis,

I would advise making the nipple from brass. It is easier to solder on to the pipe and being softer than steel, the taper seals more easily.