- BSE engines first appeared in the model lineup in 250, 340, and 440 axial fan versions
- Available in the Cadet 250M, Zephyr 340T + 440T, MS-18 440T, and Grand Prix 340T-SS + 440T-SS
- The resemblence to a CCW is not coincidence. BSE's were manufactured in Japan by the same people who brought us CCW and Kiortz but to slightly different specs.
Exclusive use of BSE's
- All 1973 Moto-Skis came through with BSE's.
- 250, 340, and 440 fan engines stayed the same but were joined by a 295 twin fan, 400 twin F/A, 440 twin F/A, and a 340 triple F/A
- The 295 was a rotax in desguise. It is the same basic motor as found in the '73 ski-doo's and even has a "Made in Austria" tag
- The 400, 440, and 340 triple F/A engines were also rotax engines slightly reworked
- Models using BSE's were: Cadet 250 (fan) , Capri 295, 340, and 440 (fans), Zephyr 340 and 440 (fans), "F" 295, 340, and 440 (fans), "S" 400(F/A) and 440 (F/A), "SR" 340 F/A triple.