How do I identify these clutch weights?

[Vmaxkid]

I have a set of 6 new clutch weights that I am assuming go to a Yamaha clutch as I got them from a Yamaha dealership that closed. There is nothing to identify them other than a “N” on the side. I used a food scale I have to weigh them and they all come out as 1-5/8 oz or 45 grams. I am going to assume they aren’t OEM as they would normally be stamped with a few numbers and/or letters. Anyone?

 

[SaskAttack]

Race program or aftermarket? Just guessing .

 

[Srxspec]

Those are weights for a 1978/1979 Yamaha SRX. Part # 8G9-17632-00

 

[Vmaxkid]

Thank you