Does anyone know if there were internal changes to the carb when the 9.5 model was updated from 4 reed valves to 2? I'm rebuilding a 2 reed valve power head and I've got both a newer and older carb to play with. I think I see some damage on the low speed needle which makes the newer one undesirable to use, also low speed needles are not compatible between the two.
I want to use my older one but I think they must've changed orifice sizes to compensate from going to a more restrictive 2 valve setup? The high speed orifice on the newer one looks slightly larger although it could be an optical illusion. I also tried blowing through the high speed venturi tubes and the newer one is much easier to blow through, is this by design or is my old one just clogged?
I want to use my older one but I think they must've changed orifice sizes to compensate from going to a more restrictive 2 valve setup? The high speed orifice on the newer one looks slightly larger although it could be an optical illusion. I also tried blowing through the high speed venturi tubes and the newer one is much easier to blow through, is this by design or is my old one just clogged?