A Go-Cart

The lost year for Technic. After the release of the pneumatic sets in 1984, many of which were not released in some markets until 1985, and anticipating the Arctic Action series of next year, Lego produced only 1 new set for 1985, the promotional 1972 go-Cart. which was designed as a starter or trial set.
The small blue Go-Cart had only 1 function, front-wheel rack and pinion steering. To its credit, however, it used 8 small wheels to simulate wide tires.
Besides this one set one technic part was released: Gear Worm Screw. This part however did not appear in any technic set until 1986 in 8660: Arctic Rescue Unit.

1985 sets:

1972 Go-Cart
Reference: Isodomus