Hey Rondo, 14/48 gearing is not what you want for holding 70mph for a long time. If your doing that, you should stay stock or just drop the CS sprocket 1 tooth. I've always bought X ring chains, dunno if they are any better but they work. This last time I bought Primary Drive brand Chain and Sprockets ( Gold X-ring chain and 14/48's and it only cost around $85, that was from rockymountainatv.com I used Sunstar before that and they are also very good, Got 8000 miles of mud, sand, gravel and some highway out of them. The key is STEEL. Get steel sprockets.