Electronic Fuel Injection is now fitted as standard equipment on virtually every street motorcycle produced.  There is no equipment currently available that will enable a technician to accurately analyze the condition of the fuel injectors while they are on the motorcycle. This makes it impossible for the technician to correctly and accurately diagnose faults, or make adjustments, to a fuel injection system.  The MPS Fuel Injector Cleaning & Flow Testing service will ensure that you are starting with properly working injectors that flow a known amount.  Just send us your injectors and you will receive back ultrasonically cleaned injectors with a flow sheet measuring flow in cc per min for each injector.  When sending injectors please mark them by the cylinder they came from so we can identify each injector.

"The highest demands are made upon the injector during manufacturing. 
In the manufacture of the valve needle and assembly of the injector, tolerances of 1 micron apply”. 
Robert Bosch GmbH.

“When the solenoid windings are energized, the valve needle lifts by about 0.06mm (according to the valve design) and the fuel is then injected through a calibrated metering gap”. 
Robert Bosch GmbH.

"Every 200 injectors Bosch produce, 5 are checked and tested for quality and performance. After every 2000 Pintle shafts that are ground to 1 micron tolerances, the grinding tips are replaced."
Robert Bosch GmbH.

The Injector Valve has the finest tolerances of any mechanical component on the engine.

We are constantly checking Milliseconds, Millivolts, Milliamps. When do we check Milliliters? 

We change Air Filters, Oil Filters, Fuel Filters, how often do we change Injector Filters?

Heat Soak is the biggest cause of fuel injector problems.  Heat Soak occurs when the pintle is hot and the engine is turned off.  A small amount of residual fuel remains on the pintle end of the injector. The heat from the engine evaporates this residual fuel leaving microscopic layers of lacquers, waxes and varnishes from the fuel’s chemical additives on not only the tip and seats of the injector but also on to the inner walls. This drying process produces a fine layer of hard, "baked on", difficult to see and difficult to remove chemical coating. A small amount of this coating can affect the travel and seating of the pintle.  which in turn will affect the fuel delivery, the fuel distribution and the atomization, resulting in combustion related problems. With the latest generation of Lambda controlled engine management systems, a matched balanced set of injectors is critical to the engines correct performance and operation.

All parts sold by MPS are for off road closed course use. They are not intended for use on public streets or highways.

Motorcycle Performance Specialties
5350 McIntosh Point #132 - Sanford, Florida - 32773
Phone: (407)330-9727 - Fax: (407) 322-8632
Sales E-Mail: sales@mpsracing.com