To have a Speedometer recalibrated, the following exercise is all that is required for you to supply the information we need.
Please Follow These Instructions Exactly
1 Disconnect Flexible Drive from Instrument End
2 Mark Drive Wheel tyre with chalk line, masking tape or similar.
3 Mark body or chassis with a line corresponding to the line on the tyre.
4 Ensure tyres are inflated to correct pressure.
5 Push vehicle along the ground in a straight line for 6 turns of the drive wheel whilst an assistant counts the number of turns the inner speedometer cable makes, to the nearest 1/8 of a turn. (To facilitate ease of counting a cardboard arrow can be made and pressed onto the end of the inner cable.)
6 Supply make and size of tyre.