2004 Polaris Touring Service Manual, Page 25Get this manual
GENERAL INFORMATION TDC: Top Dead CenterPiston's most outward travel from crankshaftTransfer: The movement of fuelair from the crankcase to the combustion chamber in two stroke engineTrigger Coil: Pulser coilGenerates the voltage for triggering (closing) the thyristor and timing the spark in CDI systemsSmall coil mounted at the top of the stator plate next to the ignition generating coil, or on the outside of the flywheelV Regulator: Voltage regulatorMaintains maximum lighting coil output at approx14.5 ACV as engine RPM increasesVenturi: An area of air constrictionA venturi is used in carburetors to speed up air flow which lowers pressure in venturi to below atmospheric pressure, causing fuel to be pushed through jets, etc and into the venturi to be mixed with air and form combustible airfuel mixtureVolt: The unit of measure for electrical pressure of electromotive forceMeasured by voltmeter in parallel with the circuitWatt: Unit of electrical powerWattsamperes volts