Hi Guys Jack at V. E. Petersen just provided the part numbers for the HAPI Ultra Carb based on the Tillotson carburetor Model number OM41A 2 provided by another fellow here on the net. These are current part numbers.
Gasket Kit GS-189 provides the correct gaskets. $3.87 Needle & Seat Kit 233-683 provides the correct needle and seat. $3.50 But, before you order verify the seat jet diameter as there are several different seat jet diameters available for the carb. Jack is mailing me a copy of the service manuel and I will make it available to the KR Net. The company name is V.E. Petersen, 28101 East Broadway, WalBridge, Ohio, 43465. You can call in an order for parts at 1-800-537-6212.