O.S. Engines 50SX - Manual (Page 42)

MAX - 91FX RING
Dimensions(mm)
Displacement
Bore
Stroke
Practical R.P.M.
Power output
Weight 14.95 cc (0.912 cu.in.)
27.7mm (1.091 in.)
24.8mm (0.976 in.)
2,000
~ 16,000 r.p.m.
2.8 bhp / 15,000 r.p.m.
550g (19.42 oz.)
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SPECIFICATIONS
41
4-
φ
4.2
66.5 29.5
UNF5/16-24
24.7
42.6
43.5
61
25
52
103
81.5
21.5