
The 0.70 size is used as standard for the secondary idle jet on
Weber 32 DMTR carburettors as fitted to X1/9 European 1300 models up to 1977,
and on Weber 34 DATR carburettors as fitted to X1/9 European 1500 models.
Genuine Weber carburettor parts by WEBCON.

Also applicable to
the secondary idle jet in
original Weber 32 DATRA and 34 DATR carburettors of
Lancia Scorpion and Montecarlo S1 & S2 models.
| Idle Jets - Standard Size |
| Carburettor | Primary | Secondary | Model |
| 32 DMTR 22 | 0.50 | 0.70 | X1/9 European 1300 (up to 1977) |
| 32 DMTR 34/250 | 0.50 | 0.50 | X1/9 European 1300 (1977 on) |
| 32 DATRA 19/100 | 0.55 | 0.60 | X1/9 Australian 1300 (1978 on) |
34 DATR 7/250 34 DATR 28/250 | 0.47 | 0.70 | X1/9 European 1500 |
| 32 DATRA 9/100 | 0.50 | 0.70 | Lancia Scorpion |
34 DATR 4/200 34 DATR 4/250 34 DATR 4/150 | 0.50 | 0.70 | Lancia Montecarlo S1 & S2 |