polaris troubles need help

hey guys, i own a polaris 140msx 03 model and have been having trouble lately with it.. i've have narrowed it down to maybe one of the sensors.. problem: doesnt want to fire first go, runs in idle but has no excelleration when throttle is applied.. reset battery strats then revs for two or thres seconds like it fine then cuts out and want rev go figure.... anyway i'm having trouble finding wiring diagrams or anyone in tassie that has knowledge about polaris, typical!! just woundering if any one has had same problem or no's how to fix.. also how many sensors do they have found one!!! would have and info or diagrams to send.. any help would be greatly appreciated.. send diagrams etc to [email protected]