I hate novak products. We see more novak failures at our track then ANY other brand... actually, probably more than all the other brands put together. The tekin RS is a great speedo for running a 13.5 turn motor, but all of the current major brand motors will run just as good, or better, than the novak. My experience would point you towards either the Epic Duo3, or the LRP x12. Both are far better motors than the novak.