Saving Old Seagulls

Hello all.
What is the normal compression reading for a Seagull century that has done a fair amount of work.
Mine is 65-70psi and I think this may be a bit low for a 100cc engine.
Any one any ideas ?
Thanks.
Regards all.
Ray.
p.s. The transom to motor bar (pivot bar) on my engine is brass.is this correct?

ROLL ON SPRING.

http://www.saving-old-seagulls.co.uk/fo ... f=5&t=1678

Sorry not in a chatty mood.......... so bluudy hot! Something has gone terribly wrong with the weather

you should be happy. a new 102 motor was supposed to have about 60 psi but would still start on half that.so 65-70 is great!

Thank you billyboy.
Thats good news.
Just thought the compression would be higher than on my 40s.Thanks for the information.
Regards
ray

the 64's were supposed to be about 135 psi new.they would also start with about half that at a pinch.

Yes the pivot bar is brass.

Check your compression tester. 50psi is very good.
The 40 compression should be greater. See:

http://www.britishseagullparts.com/engi ... ession.htm

Further to that.
What is the engine number? I'm very interested in whether that cylinder head makes a difference.