X1/9 Main Jet - 1.35

The 1.35 size may be used as an upgrade to the standard 1.30 secondary main jet for Weber 34 DATR carburettors, as fitted to European 1500 models. Can help eliminate low-medium range flat spots when used in combination with upgraded primary jet and increased ignition advance. The setup most suited to your car can depend on air filter and exhaust type.

Main Jets - Standard Size
Carburettor	Primary	Secondary	Model
32 DMTR 22	1.10	1.15	European 1300 (up to 1977)
32 DMTR 34/250	1.10	1.15	European 1300 (1977 on)
34 DATR 7/250	1.07	1.30	European 1500