2004 Aerox 50 wheel conversion?

[alexisdala]

Hello everyone,
Wondering if there are any options regarding fitting 12 inch rims to the aerox (standard 13 inch rims). There are some better options for track tyres in the 12 inch size I can't get in the 13. Anyone done something like this or know if it's possible to buy rims that would allow this to work.
Thanks

[aeroxbud]

All the Yamaha 12" wheels are drum brakes .
The job RR has the the same water cooled engine as the aerox. But to swap to a 12" wheel you would probably need the output shaft, brake pads, pins, cable, and a new lever, and the three springs and the wheel for the rear if it was possible.I
Front would most likely be an easy swap.
A lot of work. And probably cheaper to just buy the water cooled jog engine.