Hi all,
Having issues sorting the dreaded pilot cct, rides best with the air screws almost out (4 Turns)
All stock #40 pilot,#75 main, filter, filter box, Carbs clean.
So decided to check everything Vacuum synced, Ignition timing good etc.
Valve timing:
I assumed that if i were to just detect the movement of say the inlet rocker on 4 I could look at the timing mark through the points plate and see it ~ 5° before the 'T' mark( roughly on the 'F' mark). However it is just before the two advance timing marks! probably about 30° BTDC. Checked it twice! I must misunderstand something?
Is the spec 5 BTDC when the valve is fully open?
So took the rocker cover off to check the Cam Markings. Set crank to 1-4 TDC and the marks on the cam sprocket are almost flush with the casting, if I line them up exactly the fixed timing mark lines up with the left hand edge of the letter 'T', about 2 or 3° ATDC.
Is this chain stretch? I don't think its far enough out to be a link out. Is it too far out?
Great to solve this one thanks in advance.