Are there any tell tale signs of O.E.M. vs aftermarket (China / Taiwan) centrifigal Advance components? I recently bought some supposed O.E.M. parts but am not sure if they are in fact O.E.M.

1. Do the lugs on O.E.M. advance weights tend to run larger or smaller than import junk?

2. Do the slots for the advance weights in the O.E.M. point lobe cams run smaller or larger than import junk?

3. Do the bores in the O.E.M. point lobe cams run larger or smaller than import junk?

4. Are there any other visual clues as to the originality of the components??

 

couple a pictures could help in this case - its a familiar visual for most to give you an answer

 

This is a shot of cam lobe's , OEM and aftermarket. The non factory ones you need to mic, skinny lobe the fat side, not uncommon to find big variations. Weights themselves are all over the place visually, some look OEM others are obvious knock off's. Base plates the factory pins are harder, imports will wear on the pin on one side at the bottom.

Left one is aftermarket, see how wide the tip of the high point is compared to factory on the right ?




You can see the variations on the cams on the aftermarket stuff, I rebuild the usable ones for my broke *** hardheaded buds who never seem to have enough money do it right.

 

heir is a photo of an OEM Eagle Iron advance weight set, price is 75 euros . . .a little pricey but its OEM !

advance unit from J.W.Boon, NOS OEM Harley Parts