150 403 Flywheel

[j**r**m]

Hello is a 150 403 flywheel for a 61" or a 74" motor? thanks-Jim

[Jerry Wieland]

Both. They merely machine the crankpin hole in a different spot and to a different size. The easy way to tell if it is 61 or 74 is to look at the crankpin nut keeper anchor hole. If this hole is outside the radius formed by the inner circle of the flywheel it is 74 - if this hole is inside that radius it is a 61.

This is an EL 61" flywheel.



This is a FL 74" flywheel (This is actually an early shovelhead flywheel but the effect is the same.



You can also see the crankpin diameter difference in these photos.

Jerry

[j**r**m]

Thank you a bunch Jerry that info and pics helped alot!