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Honda CB125 K3

CB125 K3

This was the first of the 'vertical' twin supersports, running the same fabricated chassis as the CB175K3, and CB175K4. It was a little heavier than the tubular CR93 type chassis, and with a very rigid pivot for the sing arm, handled very well indeed.

The engine retained the side cam chain, and was considerably lighter than the centre cam chain engines, which by now were produced only as 175, CB sports and CD touring.

Mechanical specification of Honda CB125K3 model year 1969:

  • Engine type: Single overhead cam twin cylinder two valve.
  • Bore and stroke: 44mm x 41mm
  • Compression ratio 9:4:1
  • Carburation: twin Keihin 22mm slide type
  • Weight: 112kg
  • Dimensions: 1980mm x 1040mm
  • Displacement: 124cc
  • Power 15 BHP @ 11000 RPM
  • Torque 1.05kgm @ 9500 RPM
  • Tyre sizes: Front 2.50 x 18/rear 2.75 x 18

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