I bought this quad from my boss for cheap. It ran fine when he last ran it a year ago. I drained the fuel, changed the spark plug and battery. When i crank it over it just turns over and no fire. I pulled the plug and it has plenty of spark. I took the carb apart and cleaned it and everything is fine there. I sprayed a little ether in the plug hole and tried and no fire. I'm at a loss here and really hate to take it to a dealer. Is there something i'm missing? Any help is appreciated.

 

Okay i think now that i may have a weak spark. Should i replace the coil and stator? Anything else that could be causing the weak spark? Maybe the battery i bought isn't putting out the correct amps? No gurus here? Thanks

 

make sure the carb is really cleane. blow all holes and passages out with a rubber tiped nozel. i cleaned my wifes 350 3 times before i got it all cleane. runs great. also get a new spark plug.

after that if it still doesnt run, check the valve clearance. herd that from someone that hade a similar problem.

 

Thanks for the response. I have cleaned the carbs twice and will do it again. I bought 2 new plugs and tried each one. I get no fire at all and the plug has spark so maybe it is the valve clearance.

 

Just a stupid idea but you did check the kill switch and I mean the one on the handlebar. I have seen it many times that someone is chasing this foolish no start issue and it turns out the kill switch on the handlebars is switched to the X no start position. It will crank just no spark. Have done it myself.

 

Well i got it fixed on saturday and my daughter has been riding non stop. I did check that the kill switch was working. Turns out the intake valve had no slack for valve lash. I adjusted the valves, cleaned the carbs twice, changed the spark plug and oil, and put fresh gas in it and it runs like new. thanks for the help.

 

Good job!
glad to here it's running
i bet she is happy