MR-2
Two of these were used on the
1937 Petrali knuck speed bike

MR-3 Aluminium body

MR-3 Aluminium body
[custom 3 bolt]

MR-3 bronze body

MR-4

NOS MR-4 !!!

MR-4A - WR & KR
"extra capacity" bowl not stock

M-53
1952-1954 K models

Dirt track
"extra capacity" bowl

Linkert racing models
components

The almighty "bombsight" venturi

Early "bombsight" venturi

Odd brass bowl
on an MR-4