What are these reeds for?

[kawa js550]

Got these reeds from a box of parts a guy gave me. I looked up the part number and cant figure out what they are for. I figured they were for a yamaha because of the picture on the front but they look like kawasaki reeds to me. I can confirm they are not 650 yamaha reeds. Part number: 5243934

 

[wmazz]

Part number: 5243934

Unfortunately that isn't a part #. Maybe the part # is printed on the back side?

At least their advertising on the package is honest. Nothing about gains with peak HP,
only gains in acceleration.


Bill M.

 

[john zigler]

They are 550SX. Part number is right on the front, 014