If 1 turn out is no different from 2.5 to 3 turns out. The carb may have something plugging a jet. It needs to be cleaned.

Another possibility is they are still using the piece of cardboard with the 3 small holes in the air filter box. My 125 had the air filter in the front nose of the quad. If yours is the same you might want to check that.

 

the air filter is on the back of the carb and is brand new i got it running good for about a 1/2 hour then it started to back fire and sputter just like before

 

Sounds like the symptoms one would associate with a weak spark.

Try pulling the spark plug- first inspect it to see what the business end looks like, the ground it and crank the motor, and see if you have a nice, fat blue spark.

I'd also try pulling the fuel line off the carb and see if it has a good flow.

I know, I know...this sounds rudimentary.....but ya do have to always check the simple things first.....

 

thanks the spark plug seems fine , cleaned it anyway the carb has good flow to iti even changed the fuel filter.

 

Are you still using the stock spark plug? NGK C7HSA is the replacement. Weird how it runs good for a while and then goes bad. Maybe the coil heats up and starts to fail? Confusing for sure...let me think about it some more....

 

my new carb came in today it took care of all my problems thanks for all the help i recieved

 

hi back agian the new caeb took care of the idleing problem but after running it for 1 hour or so it started to sputter agian and the idle went off i called the place where i bought it but they where not helpfull i dont know why this is happening pleasde help my son has had this for 1 month and can not ride it.

 

Damm...hmmmm...are you using a fuel filter.

 

yes i just replaced it along with a new fuel line.

 

How about the spark plug? Stock? If so start there..It might be a bad coil..they are known for working until hot..cool off and fine for a while.