Primary ratio

GR1

Registered
I would like to know if it is possible to change the primary ratio to 1 (i.e. gearbox input revs are equal to crankshaft revs).
If somebody has the engine/clutch/gearbox diagram (exploded view or similar) where the workings of the primary ratio could be seen - I would be grateful for a copy.
Many thanks in advance.
 
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