i got a 2008 420 on trade. It won’t start. Battery is good. Spark plug is good and firing good and blue. It’s getting plenty of fuel. Has new injector and it is working I’ve tested it. Has good compression. Ive treid getting it to hit on starting fluid and it still won’t start. Help

 

Is injector factory honda? NGK spark plug? what was compression reading? Just afew question here to try to help with the history of atv.

 

 

Might want to check timing....good spark means nothing if t happens at the wrong time.