After waiting 2l-1/2 months for the proper size jets, I finally rejetted my 1974 2002 according to the specs published in Motortech BMW’s book.
The owners manual shows the 1974 2002 with a Solex 32/32 DIDTA carb to be jetted as follows:
- Primary main jet 117.5
- Secondary main jet 140.0
- Air corrector primary 120.0
- Air corrector secondary 90.0
- Idle jet 47.5
I replaced the primary main jet with a 120.0 and changed the air corrector secondary to a 105.0.
I also advanced the nut on the accelerator pump linkage by 1% turns, thus giving a little more fuel to each squirt upon acceleration.
After reassembly I adjusted the idling mixture screw, using an air/fuel ratio meter, to get a CO reading of 1.8% with an air/fuel ratio of 13.8 to 1.
Results: FANTASTIC! Smooth strong performance throughout the entire range. No stumbling or surging whatsoever. It was hard to believe that such a small modification could make such a large difference in performance.
Author: Doug Baxter