I have an 03 Raptor and I was working on the jetting. After getting everything how I thought was right, I took it for a ride. Started up fine, idled fine, and rode great. After about a mile into riding, it killed and wouldn't start back up. It would just crank and crank on the motor. I checked the float levels again to make sure that they were filling up, and they were fine. Any ideas on what may be going on. Also, please add what you may think I should be running on jets. I have 144/146 DJ and went up to 146/148 and it ran like crap. Went back to the 144/146 setup with the 3rd clip and now I have this problem.......???????????

 

What does your plug look like? Are you getting spark? If not then check your coil and make sure the ORANGE wire from the CDI is pluged in and that its connected at the coil.

 

I agree. Check the spark, it sounds electrical.

 

Spark is good. It was also running on a brand new plug. I didn't even get to ride it long enough to get the plug to get a color to it before it shut down.

 

Try putting your old plug back in.
Check and see if your carbs didn't pop out of the boots.

 

I checked the carbs and they are still in the boots and it does the same thing with the old plug in.