Solas yd-cd-12/18 Concord Yamaha impeller, has unique blade design that delivers remarkable thrust take off, improves acceleration and top speed 2+mph. Solas yd-cd-12/18 Yamaha impellers great for pulling skiers to racing.. Solas impeller. Solas This upgrade over stock impeller Fits Yamaha XL 1200 98, Raider 1100 95-96, Venture 1100 96-97 66f-r1321-00-00 63m-51321-a0-00