Browse Publications Technical Papers 2000-01-2914

Motorcycle Electronic Fuel Injection Retrofit 2000-01-2914

A 1996 Kawasaki ZX-6R motorcycle has been converted from a four-carburetor intake and non-load sensitive ignition to a programmable electronic fuel injection system for performance enhancement. Throttle response and power delivery are greatly affected by proper fuel and spark management. Quick throttle response and smooth power delivery are particularly important in motorcycle road-racing applications. In order to achieve this a programmable engine management system is necessary. Due to turbulent air flow phenomena the fuel requirements of an engine can oscillate throughout the engine speed range. These airflow efficiencies are dependant upon many items including intake size and shape, camshaft design, exhaust design, surface roughness of the intake and exhaust ports, etc. In order to achieve proper air/fuel ratios, relative to rider demand, the current setup is not optimal. The original equipment manufactured (OEM) ignition does not recognize engine-operating conditions; it only references engine speed. The original fuel configuration consists of (4) 36 mm Keihin constant velocity (CV) carburetors.
The new configuration includes (4) throttle bodies, (4) injectors, and a MoTeC M4 Pro engine control unit (ECU) with data acquisition. This system will be able to change the ignition timing and injection pulse width relative to engine load and speed.


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