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Tech. Advice: Series 'A' 500cc/1000cc Bikes
Restoring the last of the series "A" Comets.
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<blockquote data-quote="greg brillus" data-source="post: 82437" data-attributes="member: 597"><p>Does anyone know the diameter of the head of the inlet valve........?........ I have a new one here, but the valve seems to only just cover the seat in the head. I compared it to one of the original valves out of it and it does seem a tad smaller. Can anyone also confirm the seat angle is 45 degrees on the pre-war heads/valves. While I'm at it........Dose anyone know what the type of black finish it is that was on the various studs and other hardware, was it like bluing on a gun barrel. I feel the parts could be cad plated, but I'm sure I have seen the remnants of a black finish on the original studs......Not sure about the other nuts/bolts and washers. Thanks in advance.............Greg.</p></blockquote><p></p>
[QUOTE="greg brillus, post: 82437, member: 597"] Does anyone know the diameter of the head of the inlet valve........?........ I have a new one here, but the valve seems to only just cover the seat in the head. I compared it to one of the original valves out of it and it does seem a tad smaller. Can anyone also confirm the seat angle is 45 degrees on the pre-war heads/valves. While I'm at it........Dose anyone know what the type of black finish it is that was on the various studs and other hardware, was it like bluing on a gun barrel. I feel the parts could be cad plated, but I'm sure I have seen the remnants of a black finish on the original studs......Not sure about the other nuts/bolts and washers. Thanks in advance.............Greg. [/QUOTE]
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Tech. Advice: Series 'A' 500cc/1000cc Bikes
Restoring the last of the series "A" Comets.
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