1946 model 18 rocker box ?

Joined
Jun 22, 2020
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Gents,

During some routine work on 46 model 18, I was kicking it over by hand and my hand was on the rocker box and I felt air leaking between the rocker box and cover When on a compression stroke?? This bike is a recent purchase and runs ok so far. As for the air, is this common to have air in the box area? If not, I would assume that maybe a valve not seating would cause air to leak up past the seat and through the valve guide maybe…I don’t know? I will check the valve clearance too.
Thanks much.

Nate.
 
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