Help Jetting problems

[renae]

Ok right now my son has a Keihn carb, DG type 2 pipe, K&N filter, and a vented air box lid. Here is the problem It won't kick start cold and it won't idle. I am putting it back to the stock carb and air box lid but I am leaving the K&N filter and pipe on it. What jetting should I start with. All of the work was done on this quad when we bought it so I don't know what the jetting was to start with.

[blaster99]

check the reeds, starting hard is a good indicator that the reeds are bad. then you could go wit hthe biggest jet you have, and work you rway leaner and leaner until you get it.

[Modifly]

Stock intake bar k&n.
stock engine + exhaust bar DG pipe.

start with a 260-270 and work your way down until correct.

I used to run my airboxlid off, K&N, gutted exhaust and wiseco piston and that was only 290