Valve Seals

Hello fellas I have ordered a top end gasket kit from Z1 enterprises,I have received that today and it came with a kit from a brand Vesrah which I could have bought cheaper on eBay as well as another brand name Athena, the reason I was avoiding those brand its because I don't know if are good or not specially on steam seals, I remember back in the day that if the seals where not OEM it was not good, has anybody used this brand of seals are any goos at all or should I return it?

Whatever the brand, I would want to assure that the valve stem seals are made of Viton.

Good Fortune!

could not find any information online about what material this are made off, has anybody used this kits and have any quality reviews on it?

Vesrah quality is mediocre. Better than Athena but not up to OEM Kawasaki level.

Thanks thats what I thought but needed confirmation, managed to get OEM at a fair price so I am putting those aftermarket away. did not bring the cylinder jugs Orings that it was suppose to bring in the set I ordered from KZ enterprises I cloud have them sourced from somewhere cheaper If I knew the brand.
Thanks