Bandit250 (GSF250) GJ73/74A Mikuni carburetor Jet needle (JN) and Needle jet (NJ), a set price of $ 10.9, if you need four carburetors maintenance, need to purchase 4 sets. Moreover, Since (GSF250) GJ74A four-cylinder motorcycle, for the balance of the requirements are relatively high. Therefore, the proposed purchase of four sets of full replacement. Thus, when adjusting the mixing ratio, it will be easier. Jet needle (J.N.) and Needle jet (N.J.), which are the most easily damaged parts of the Mikuni carburetor. Most of the carburetor malfunction, and the two components are related. Therefore, these two parts will be a great help to the maintenance. Repair kits purchased two sets or more, there will be a 10% discount. I am in the picture, marked with a detailed part size parameters, please compare the size, then buy. Avoid the wrong purchase.