Rev Counter
gearboxes we supply are the ball race bearing type giving a smooth silent
output
These gearboxes reverse the rotation of the shaft to which
they are attached
Example Clockwise shaft gives anticlockwise cable
rotation and vice versa. The rotation is determined by looking at weather the
gear that is going to drive the gearbox, rotates clockwise or anti clockwise
when viewed end on. Most British four stroke machines take the drive from the
camshaft or magneto giving half true engine speed. Most common types used are
1/1 or 2/1 reversing gearbox.
Example: Gear driven in anti clockwise direction at half
engine speed would take 1/1 reversing gearbox matched to a 2/1 rev clock
(Doubling cable speed) = true crank RPM Likewise a 2/1 reversing gearbox would
match a 4/1 rev clock. It is assumed clockwise cable rotation is required at
the tacho head WHEN VIEWED FROM ABOVE LOOKING DOWNWARDS. Some machines
have clocks that require anti clockwise cable drive Examples are some Enfield
twins, Triumphs, and Vincent’s.
BG1508/04 BG1508/00 BG1507/08 1:1 REVERSING
We operate a no quibble exchange or
refund as positive feedback and customer satisfaction is paramount to our
business
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About Timeless Motorcycles:
Formerly A. Gagg & Sons - We specialise in the refurbishment, repair and servicing of Smiths Chronometric & Magnetic Speedometers & Tachometers. We are based in Mansfield Woodhouse, Nottinghamshire and can be found on Google maps or by contacting seller on this account.