Valve seat pressure

Started by fmorik, July 10, 2019, 08:12:31 AM

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singleminded

Hi Franz..this site is a little slower in response from members, but you get good information.
The thing about your original springs is that no-one can say how worn yours were.
I personally would not want my springs to be more than about 30Kg..There are much stronger fitted on some bikes.
I have heard of 50Kg 110lbs on goldstars and some racing Vincents, and possible even higher poundage. but these seem to be high revving ( 7000 rpm)+ engines..
Have you tried talking to Chris Odling, his details are in the suppliers section on the home page for this site.
Hope you find what you need..John Hood

fmorik

Hello to the club members! Does anybody know the correct valve seat pressure for coil springs for Mod. 9A OHV 1937 or a recommend pressure? I purchased valve springs for Mod. 9 from the club shop (No. 1S-27) with about 88 lbs (40 Kg). Would this be okay? The old ones have had a seat pressure of 48 lbs.
Best regards
Franz