I have a 88 blaster I just bought 2 weeks ago.was running great till 3 days ago when I rebuilt carb i put everything back together and fired right up for about 4 seconds then died.now I dont have spark.I have changed stater have checked cdi box and was told that coils hardly ever go out.so I'm lost,can someone please help.this is my first blaster,and as of right now it's looking like my last.