Uhhh, the ore has been radiused to allow the pushrod o-ring to compress rather than be sliced during assembly? Bonneville head, correct? Set screw holes drilled and tapped for exhaust spigots?
Do I win any old bike parts?
Uhhh, the ore has been radiused to allow the pushrod o-ring to compress rather than be sliced during assembly? Bonneville head, correct? Set screw holes drilled and tapped for exhaust spigots?
Do I win any old bike parts?
Damn, a loser again! Maybe next time.
I agree oil sealing could be improved on 650 twins, but I understand it also has something to do with poor crankcase ventilation and both pistons moving together rather than 180 degrees apart.
As for un-shrouding the valves, it looks like you basically smoothed out the chamber around the circumference of the valve, no? Any before pics? I wonder how yours compared to my later '71-72 heads in this area before you started work.
-James
-James
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