I have 04 400 outlander and when you first get on it it runs like a dream quick and lots of power for a 400. But almost exactly at 5km it quits then when it fires back up it spits and sputters and lurches forward and dies. You have to have the choke on half for it to even idel at this point. If you shut the choke off it quits. We took the carb off and it was very clean no clogs we cleaned it up and blew some air threw it. What next?