Oh, and after you do that, make sure you drain any fuel that might be in the exhaust header before you fire it up. I almost burned my F1, and maybe my garage, to a crisp; I cranked it over and it shot fire like an Army flame thrower onto a nice new stack of baseboard trim. Had to use the nearby fire extinguisher, and then quickly clean everything up before the wife returned. The trim was fine, and my wife never knew. The rear Marvic still has a slightly "toasty" hue compared to the front. True story. MikeV