Hi, I just rebuilt the centre cylinder of my 1991 RXL 650 EFI. The compression is now great on all cylinders, I am getting spark, and the fuel pump is kicking on. When it starts up, it runs absolutely fine. After about 30-45 seconds of running though, it stalls and shuts off. It is difficult to get it started again, though after waiting a few minutes, it starts up first pull. Im thinking it could be an electrical issue, maybe I missed a connection when putting the snowmobile together again after the rebuild? I have checked all the connections that I can see, without dismantling the engine again. What could be the issue...? I dont know what to do Thanks.