Honda CBX1000 Carbon Fibre (fiber) Fuel Injection project

Honda CBX1000 – Fuel Injection Project

(with one piece carbon fibre (fiber) injector bodies)

Step 1: Design on CAD the desired trumpet shape with appropriate taper and length

Step 2: in the absence of a CNC machine I printed the CAD drawing 1:1 scale and marked of the dimension at 10mm intervals and marked them on the 76mm dia Alloy round bar stock ready for machining.




Step 3: due to the small size and age on my lathe the process of machining and then subsequent hand finishing and polishing took some 8hrs of machine time.





Step 4: Cut and lay up the carbon fibre sock material over the mandrel. ( sorry can’t show you all the ticks to the process )



Step 5: Wet lay the resin into the carbon and let cure.



Step 6: Part the Carbon piece from the mandrel and trim the sharp edges ( sorry more secret steps used to part carbon from mandrel with 250mm length and only 0.5deg of taper ) then repeat the process 5 more times!


Step 7: Sourcing of parts:

  • Butterfly shafts x2
  • Shaft bearing x 12
  • Shaft seals x 12
  • 38mm Butterflies x 6
  • Bosch Injectors x 6
  • Injector Bosses x 6
  • Injector caps & wiring tails x 6
  • Balance tube nipples x 6
  • MAP sensor
  • TPS
  • Air intake sensor
  • Engine temp sensor
  • Fuel injection EMS
  • Wide Band O2 sensor and controller
  • Ignition trigger unit
  • Fuel regulator
  • Fuel rail
  • UJ to join the 2 banks of 3 injector bodies
  • Cable Pull & throttle stop
  • various plumbing parts
  • Inlet rubbers
  • Inlet clamps
  • fuel hose
  • high pressure fuel pump

When fitted to the 1425cc CBX engine in my red CBX cafe racer this set up will have significant BHP potential without the rideability sacrifices


Stay tuned for more pics and updates as the parts arrive and the build progresses.