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The general construction of a Spring Frame follows very closely, in its outline, its rigid, conventional counterpart, but the chain stay portion of the rear triangle of the spring frame is mounted at its forward end on a pivot (A) so positioned as to allow the rear fork end (B) to move with the rear wheel in a vertical plane, the shock of the movement being taken up by spring-loading (C) the seat-stay, and controlling the movement by a damper (D).
The essentials of good Spring Frame design are :—
(b) The pivots must be on wide centres to give a good working base.
(c) The pivots must be mounted on large taper roller bearings, the wear on which must be taken up easily.
(d) Lubrication must be made easy by the provision of suitable grease gun nipples.
NOTE.—Upswept Exhaust Pipes cannot be fitted with Spring Frame.
WHAT IT DOES —
(b) Gives you a new perception of riding comfort.
(c) Gives longer life to every part of the machine, particularly batteries and tyres.
(d) Converts third-class by-roads into A class highways.
(e) Gives you that " on rails " feeling on corners and makes for SAFETY FIRST.
WHAT IT DOES NOT DO—
(b) Cause skids.
(c) Roll on corners.
(d) Put the wheels out of track by the rear wheel " pulling round " — the taper roller bearings see to that.
Sprung Carrier, with pillion seat, 30/- extra.
If you have a query or information about New Imperial motorcycles please contact us
