Flywheels - (?aftermarket?) - timing issues

[Lonnie]

Asking for a friend -

Trying to get the timing right and it seems that there is only one timing mark on the flywheel - a normal-appearing vertical mark with a "3" on the left and a "5" on the right. It seems that this mark comes up earlier in the timing hole compared to others. No other marks of any sort on the wheel.
Since this a post-41 knucklehead, it is possible that this flywheel set may have been used in any pre-73 motor. Does anyone have any idea as to what this "35" references and who may have manufactured these flywheels? And, is there anything odd about timing a motor with these wheels?

Any advise that can be offered would be appreciated as the bike is otherwise ready for AMCA judging.

Thanks,
Lonnie

[koanes]

I have seen flywheels from Truett and Osborn with the 35 stamped in at front cylinder timing mark, indicating that the mark is at 35 dergrees before top dead center. A good starting point for a big twin.