I have noticed that in 2nd and 3rd gear on my 400 that it sometimes feels sluggish, could this be a jetting problem? If so what can I do about it? In 4th and 5th when I am going fast I don't seem to have any throttle problems. Also, yesterday when I was riding sometimes when I would slow down to scome to a stop pretty quick in 2nd I would pull in the clutch and get some backfiring, what would this be? This quad is 4 weeks old, I have rode it every weekend pretty hard, but never flat out full throttle, My first service is not due, so I am wondering what the deal is, It seems to run strong, but when I come in hard on a curve I would like to be able to grab throttle in 3rd and it be there. Please help.


P.s. No mods.

 

Check your air filter...