DanOnWD40

That makes sense yeah. Well I appreciate your help and advice!

By the way what is your opinion on Yamaha Warrior 350? Found one... it starts and runs but bogs under load. Probably just needs a carb clean and a spark plug. Its a 1988 in blue. It looks to be in really good shape for the price and year(listed under $1000).

LOL yeah definetely tutu fellahs... I guess I will pass on this one than. Who know's what kind of "top end" work they did on it...lol

Yeah true I'm currently 50/50 on buying it. It's a hit or miss. I have owned an atv before and it had wiring problems and I got it figured out but yeah. I just got interested in this one because it's listed for cheap and i'm not really afraid to fixing things. I also just want something simple and something reliable I'm not crazy on speed or performance just casual riding through forest

Yes compression would probably be the first thing I would check if I were to go and see it. I wish I had information to all those questions... According to the current seller he bought it off someone who did the top end and hot cam. I asked the current seller if it ran after the rebuild/hotcam and he said he isnt sure. He told me that the last owner told him that he had it running, but never got the issue figured out. He bought it not that long ago without hearing it run. I did get a picture of the receipt of the top end rebuild which was a while back. The current seller said that he changed all the wires, it has spark and everything but it does not want to start. I don't have the quad but I want to see what people say about this issue, so if I do get it(which im considering) then I would know what to target.

Hi guys, so Im i cam across this pretty nice quad. Its a 2003 400ex. Its priced at a little over $1,000. The seller states that it was previously rebuilt and has a hot cam in it. However, it is not firing. He says that it turns over and has spark. He also redid the wiring harness and still couldnt get it to run. I have some experience with quads from previously owning one. My thoughts are its either something witht he wiring harness(cdi, kill switch...) or it isnt getting the right amount of fuel(needs carb rebuilt) or it's the valves. Or could it be timing? What do you guys think? Let me know! 400EXTurningOver.mp4 I have attached a video so you guys can see how it sounds like. I feel like it wants to start but is missing something...