I have been working on 99 gsr for about a year now. a mechanic rebuilt the motor and put it in for me but had family issues and has left the rest with me. i have done everything else including checking the timing and valve adjustments. i turned it over and its sputtering to start but not firing up. i didnt want to keep trying since i do not know if there are special procedures in starting a new motor. any tips would be appreciated.