good battery, tried starting fluid. will crank just not fire. pulled spark plug has spark on first crank only then nothing. thinking it something electrical just dont know what. any ideas are really appreciated.

Specifications Polaris Sportsman Engine • Starter : Electric • Displacement (cc) : 549 • Engine Stroke : 4-Stroke • Cylinders : 1 • Engine Type : Single-Cylinder Polaris Sportsman Transmission • Reverse : Yes • Primary Drive (Rear Wheel) : Shaft • Transmission Type : Continuously Variable...