Many Bultaco motorcycles use Amal carburetor. Over the years many Amal carbs, for whatever reason, are missing the intake air horn bell. The air horn is needed for the factory rubber, intake to air box, tube to be connected. These air horn’s are made for the Amal 600 series concentric. I have reproduced these from the 627 concentric on my 1973 Bultaco Alpina Model 98. Made from 6061 aluminum the dimensions are as follows – OD of 48mm, ID of 40mm and length of 35mm. If you are in need of this part I have a small supply available. Price is $45 plus shipping. If interested email or PayPal mrgt350@yahoo.com