Reply To: 1925 Ruddertwin carb

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July 4, 2021 at 11:59 pm #241982
HARRY D. NICHOLSON
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    I would never touch the end of a ruddertwin or speedster cylinder up through 1929 because the ends are extremely hot because there is no water jacket there. It is ok to lightly touch a surface with your wet finger if that surface has a welch plug on it, indicating a water jacket. Better yet is to spritz the cylinder with some water to see if the sides sizzle.