Precision, Beardmore Precision and Green Precision Engines
1910 Built 499cc sv single-cylinder engines
1911 293cc, 499cc and 599cc singles, or 760cc V-twins.
1911 their well known 3½ h.p., 85x88 mm. bore and stroke, which is shown as a complete power unit with carburetter and magneto, also the engine alone to be fitted as required ; the new light-weight engine 2½ h.p., 70 x 76 mm. bore and stroke, suitable for a bicycle weighing from 100 to 120 lbs. ; a 6 h.p. twin for sidecar work, 75 x 80 mm., which, though not a racing engine, is capable of high speed; a 600 cubic cent. model, 90 x 96 mm., for those who, while wanting a powerful engine, prefer the simplicity of a single cylinder; and a 4½ h.p. water-cooled unit, 86 x 96 mm.
July 1914. Precision Two Stroke Engine announced. It is listed as the "Type Z" in the 1914 Precision catalogue, 225 cc 2¼ H.P. b/s 64mm x 70mm.
The 350 c.c. two-stroke Precision, which we described in our issue for May 29th this year, is more or less well known, and forms the main element of the power unit. This engine, it will be recalled, has a bore and stroke of 74 mm. and 81 mm. respectively, the capacity being 350 c.c, which makes it one of the largest single-cylinder two-strokes made at the present time.
Beardmore-Precision Models
1920-1921 Model A and A "Competition" 349 cc single cyl., two-stroke
1921-1924 Model C 598 cc single cyl. (89 x 96 mm), SV 4¼ h.p.
and
1922-1925 Model D 346 cc single cyl. (70 x 90 mm), SV 2¾ h.p.
and
1922-1925 Model E 496 cc single cyl., SV 3½ h.p.
1923-1924 Model F 246 cc single cyl. (59 x 90 mm), SV 2¼ h.p.
1925 250 cc single cyl., OHV
1920
Beardmore-Precision (11.5.)
3 h.p.; 71x84 mm. (332 c.c); single-cylinder two-stroke;
(Orig doc has typo, reads "(550 c.c.)"
Green-Precision
Introduced 1912 or earlier.
3½ hp Green Precision (85 x 88 cc, 499 cc) watercooled
Association with the Green Engine Co unclear. Green Engines
