Hi all,
On the side of the engine crank case and between the two carburettors is a blanking plate.
I believe this plate was fitted to seal what was previously the oil filler pipe for the engine sump, but not used on this version of the engine.

To represent this blanking plate, I cut a disc of approximately 2.5 mm diameter from 0.2 mm thick plastic card and secure it in position on the sump using thin CA adhesive.







Two oil filler pipes were used to replenish oil in the engine sump and were located on the engine crank case on the opposite side from the carburettors. Each was fitted with a cap.

Two 2.5 mm diameter discs were cut from 0.2 mm plastic card and secured on the sump.
The centre of each disc and into the sump were gradually drilled up to 1.3 mm diameter.
To represent these filler pipes, 0.8 mm diameter rod was slide into 1.2 mm tube. The tubes were annealed then bent to the required angle.
One end was roll cut to remove the outer tube leaving rod exposed. The other end was cut completely through.
2.0 mm plastic rod was cut to to create two 5 mm lengths and a 0.9 mm diameter hole drilled through the centre of each.
These were attached on the exposed 0.8 mm rods and secured with CA adhesive.
The top of the 'caps' were then filed down to a height of 1.5 mm and sanded around the top edge..
Lastly the two 'filler pipes' were secured in the crank case holes with CA adhesive,

Mike