[phutton]

Some people have fitted the 30-60 cams, as used on the 1928-on M90s, to their M6s. inlet 30 btdc/60abdc - ex 60bbdc/30atdc. I've no experience of this, but others might like to report back!

[Tommy cooper]

That's the timing that is being used at the minute,the bike starts and runs,And I realise that better men have built engines before but felt that more over lap on the inlet  valve.
Thanks for the reply
TC

[singleminded]

Tommy, do you have the Autumn 2015 copy of Beaming?
The cam timings are listed on page 13..
FJ cams are :-  0 - 60 /60- 17..I assume that means that the inlet opens at TDC and closes 60 ABDC and the  exhaust opens 60 BBDC and closes 17 ATDC..
Are your dots missing?

[Tommy cooper]

The cams on the Sunbeam are marked FJ..the bike is a 1927 500cc sidevalve
thanks TC

[singleminded]

It's gonna depend on what cams you have..Any marks on them?

[Tommy cooper]

Can anyone give me the correct valve timing for a 500 side valve engine
thanks TC