shyte, thats terrible to hear, hows your timing, spark plugs, did you put vaseline on the injector o rings,(thats what i hear) before you put them in, you did say it was your first time. check your piggyback and idk maybe you should retune it.
safe tune
http://www.ka-t.org/forums/viewtopic.php?t=18270
safc setup
http://www.ka-t.org/forums/viewtopic.php?t=8089