Looking into the future (now), we're doing some engine swapping on some current builds. The Kawasaki 124cc that was on the tandem is now going on Pat's old 50's Schwinn Panther......fits like a glove. The tandem is getting a 6.5hp HF engine and some gearing changes if we don't pull the plug on the electric start HF 420cc monster. Some nice changes and some more fun at the races. And yes, the 15hp 420cc tandem would be raced in the unlimited class if we go that route. Stay tuned.