2004 Polaris Pro X Factory Service Manual, Page 296Get this manual
ELECTRICAL If the ignition timing specification is listed in degrees only, convert to either inches or mm BTDC and use dial indicator to verify timing marksDisconnect the TPS (Throttle Position Sensor) connector from carburetors on models with TPSNOTE: Due to differing rod lengths and engine strokes, consult the engine model list for correct engine