Quote:
Originally Posted by uncle max
The small logo 97 was original equipment, starting mid '36.
The small logo 97 has a shelf 1/2 way up the accelerator pump chamber,
allowing the bowl to hold slightly less fuel.
The small logo bare casting weighs about 6 or 8 grams more than the large logo 97... Probably due to the shelf and/or denser casting.
All parts are interchangeable.
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Max, Do you know if this has ever become a judging concern? The small 97s would also have come only with the oval vs the triangle base also, I believe. 81s also came with small and large logos.