i do agree in what zixxer says but i guess at the end of day you never know until you give this motor a go love it or hate it i personnely only used to use os motors and that was it but decided to give this little baby a shot so far happy i do like the way the motor delivers the power it is linier compared to other motors i have raced with in the past and the fact you get a pipe and all the carby inserts and also a pit towl to dry your tears at the end of the race meet wondering what went wrong its dam good value