I have a kawasaki kfx 400 quad the problem is when I baught it the seller said that the battery would not charge so I got new battery still won't start so I put a voltage regulator in and it still won't start so I put a new stator in still won't start then I put a new cdi box in and it still will not start I have spark and gas and plenty of compression but it will not start. I got it to start once for 1 min but then died and when I try to start it sometimes it backfires so anybody have any ideas ? Please help

 

The year of bike is 2004 kawasaki kfx 400

 

The next thing I would do is check the timing and valve clearance. Since you have spark, fuel, and compression that is the next big culprit. I would also throw in a new, properly gapped plug and make sure the air filter is properly serviced and the intake is unobstructed. Fresh fuel if it has been in there for any length of time as well.

 

I put new plug in and gas how do I check timing. The kid I got it from said he brought a jump pack with him when he went riding and when he shut it off he would just jump it this went on for a while and then the last time he jumped it it would not run

 

Anyone have any ideas ??????

 

Get a service manual for it to check the timing. It isn't hard to do on your own. You will have to take the head cover off and remove a couple of small covers on one of the cases. Use this opportunity to learn how to check the valve clearance also.