King Kong 50 Magnum – Davmomoto Honda Z50

  • 22/09/2016

Honda’s miniscule Z series motorcycles have enjoyed huge success since their inception some 50 or so years ago. Everything about the tiny little motorcycles defies common sense. From their sub 22 inch seat height to the ridiculous riding position you have to assume to pilot one (hence their nickname of Monkey or Gorilla bike). The fact that Honda still produces the Z today, and that they can be registered and ridden legally on the road is mind boggling, but there’s one thing that no one can deny, they’re an absolute hoot to ride!

Today’s feature is about a different breed of Z. It’s a totally revised and, for lack of a better term, ‘grown up’ version of a Honda Z50A. Built by Z expert David Morales this is the Davmomoto “50 Magnum” and here’s the story of how it came to be…

“This custom is based on a 1969 Honda Z50A. The idea behind stretching the Z50A frame was to allow for bigger wheels and tires, to make more room for things like a bigger carburetor and so that I could change out the head tube and install some real front forks.

The concept was to create an adult sized Z50 with better brakes, suspension, ergonomics, and of course more power. Some of the outside design influences were obviously café racers, but also a little bit of streetfighter style. The concept also included the installation of a mountain bike shock under the seat to make the original hardtail setup a little less punishing.”

“The first stage of the build was to completely disassembled the frame into a number of small pieces. Using an inner sleeve along the entire length of the tubes, they were extended to make the height of the frame 2 inches taller, and the length 4 inches longer.  I also welded in a number of gusset plates into locations that are common damage points on these original frames. I also constructed aluminum torque plates to fit inside the rear frame loops to stiffen the tubes, as well as creating a place to mount the rear sets.
Next the custom seat and the assembly which uses a Fox float mountain bike shock was put together. The tank was extensively modified with the lower portion of it cut off and knee dents pounded into the sides. The front fairing was made from a wire form before being hand laid in fiberglass and uses the visor is from a Ducati 956. The rear fairing is made of steel and the taillight assembly was also made from scratch.”

A custom electronics panel in the front of the bike using WW2 era aircraft instrument lights which all runs off a custom wiring harness. The front lower fork brace is made from aluminum billet to match the rear plates and the pipe was also custom made using a supertrapp muffler.


Webike Shopping : HONDA MONKEY

                        : HONDA Z50R



  • Billet triple tree set-up from HondaTB
  • Honda NSR50 forks
  • Rear suspension Fox float mountain bike shock
  • Four pot Brembo brake on the front and the rear is from a CRF 250 with CRF 450 masters
  • Wheels are NSR 50 knockoffs with Dunlop TT 92’s
  • Engine uses cases from a CRF50 bored out to allow for a 124cc top end
  • Takegawa roller – rocker four valve head and jug
  • Takegawa 5 speed transmission and special clutch
  • Yoshimura TMJ 28 carb and intake
  • Woodcraft clip-ons with ASV levers


Photography by Peter J. Salisbury



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