X1/9 Main Jet - 1.20

The 1.20 size may be used as an upgrade to the standard 1.07 primary 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 secondary jet and increased ignition advance. The setup most suited to your car can depend on air filter and exhaust type. The smaller 1.15 jet EN026 is also available.

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

Also applicable to Lancia Scorpion and Montecarlo S1 & S2.

Main Jets - Standard Size
Carburettor	Primary	Secondary	Model
32 DATRA 9/100	1.10	1.25	Lancia Scorpion
34 DATR 4/200 34 DATR 4/250 34 DATR 4/150	1.20	1.30	Lancia Montecarlo S1 & S2