Addendum to my post.
The triangle is not a timing mark. Pay no attention to it. You probably have U I C. The line between U and C is TDC. UC stands for Upper Center. The old word for TDC. There may be a ball at 5 or 6 deg before that line. Your flywheel is from another motor and may be old style markings. Look for the ball before the line, clean the flywheel. Gross timing is set on the BB ball.
You may also have I O I, I think the O is a stamped version of an embedded BB Ball. you may also see 5° stamped on the FW.
Right is right, even if everyone is against it, and wrong is wrong, even if everyone is for it. - William Penn
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