Not that I'm aware of. Best to get everything from yamaha. BUT... If you are wanting to install a cam, you are best to get some kibblewhite valve springs (and you can run any cam with em). You can find them on ebay for under $100, I think. The rockers are somewhat pricey from yamaha, but unless you go with hardweld units from either webcam or powroll (made by web, and about $60 each), your only other route is used. Valves aren't too expensinve, and there are several mfgs to choose from. Vesra, wiseco, yamaha, kibblewhite...