SilverStar Best Chain?

EDIT: Very sorry for the bad translation. The rubber chain hoses were missing when I got my SilverStar, and I have some new ones coming from the UK. I am getting chain slap from the rear wheel now when the engine is under strain I suspect because the chain tubes are missing, and the chain is adjusted properly. I want to replace the chain at the same time I replace the chain tubes. I have never had a motorcycle with the enclosed chain drive like the SilverStar and would like to know what chain is best for these bikes; a conventional chain, reinforced chain, or an o-ring chain. I have read that the o-ring chains are larger in diameter and could create frinction and excess heat in the chain tubes, and I'm looking for recommendations from the experts. In reading the responses so far, it seems most of you recommend the conventional 520-102 chain. I've always used Regina chains in the past and had good luck with them. Thank you, Donny