Please order your Needle Jet and Needle and main jet separatly as there are too many combinations to offer in separate kits. A standard setting in the UK is 250 Main Jet 44-051/250 2.76 Needle Jet 45-196/2.76 N2RING Needle 46-372 However you can order any combination of needles and jets to suit your specific requirments. Service kit contains:- 1 x Diaphragm 1 x Throttle Spring 1 x Choke Spring 1 x Jet Needle Clip 1 x Float Needle Valve 1 x Float Needle Valve Clip 1 x Choke Gasket 1 x Float Bowl Gasket 1 x Oring 8 x 2 2 x Oring 3.2 x 1.8 1 x Oring 5 x 1.5 1 x Oring 6 x 1.9 1 x Oring 2.5 x 1.5