Ok here's the deal, this is on my 300ex. I thought that my battery was bad so I took it to the battery store & they tested it & it's fine. Soooo when I hit the start button it just makes a zinging noise?? Sorry wish I could explain better LOL but anyway so I took the switch assembly off of our 400 (same part #'s) & put that on there & still NOTHING sounds the same! Does anyone have ANY ideas what this might be?? We are going to get the test light on it tonight or this weekend but just looking for ideas, I did put another wiring harness on it (cuz it was having issues before but then it didn't make ANY noises) it was just plain dead. I havne't had any troubles w/ it since until last weekend it just all of a sudden started this It will bump start just fine & run but as soon as I turn it off it's done. Well I hope someone can help me, I WISH I had a kick start!!! Thanks for your help I really need to get this figured out, I can't race w/ it like this