Up for sale is this tillotson carb. Every thing on carb moves freely. There is a small numbers on the side of the carb.(69) and hd27a. I think it came of a yamaha 433 , But i have had it a long time and can't be sure. The carb may need to be rebuilt, Just because it sat so long. If you are restoring an old snowmobile you can't go wrong with this carb. Please ask any questions you may have. Thank for looking and .